SONET Transmission Products Digital Video Codec DV-45

PEC: NT2H7914 FWP02 3.05 NTP Update

SONET Transmission Products

Digital Video CodecDV-45

FWP02 3.05 NTP Update

Update to document release: FWP02 3.01 Standard April 1993Update publication date: December 1997

Filing instructions

Step Action

1

Replace the title page, ÒRevision historyÓ and ÒContentsÓ sections at the beginning of

About this Manual

, 323-1401-091.

2

Insert the revised pages in their respective volume(s) and NTP(s), by page number. Revision bars indicate where information has been changed, added, or deleted.

3

Remove and discard the replaced pages.

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Thi d d i h F B ild 4 0 4

About this Reference Manual 323-1401-091 FWP02 3.01

Ó

1990, 1992, 1993 Northern TelecomAll rights reserved

DV-45 is trademark of Northern Telecom

FiberWorld Transmission Product

Digital Video CodecDV-45

About this Reference Manual

Publication number: 323-1401-091Document release: FWP02 3.01 Date: April 1993

ii

Revision history

Digital Video Codec DV-45 FWP02 3.01

NTP Update FWP02 3.05 December 1997

Revision history

Table 1 and Table 2 list the changes and additions to the

DV-45

Reference Manual

.

Table 1Record of revisions

Revision number Issue date Reason(s)

DV-45 NTP Update FWP02 3.05

December 1997 Combines all previous revision packages and includes FWP02 3.04, FWP02 3.03, FWP02 3.02, R2.02, and 94-015.

DV-45 NTP Update FWP02 3.04

June 1997 New version of the DV-45 shelf (NT2H50AC) replaces the older version (NT2H50AA). The new version allows a maximum capacity of eight DV-MPEG units and replaces the 7.5 A fuse with a 15 A fuse.

DV-45 NTP Addendum FWP02 3.03

January 1997 Update of the Transaction Language 1 (TL1) alarm surveillance interface for DV-45 equipment, as supported by the NT2H35KA maintenance control unit (MCU).

DV-45 NTP Addendum FWP02 3.02

June 1996 Introduction of the Transaction Language 1 (TL1) alarm surveillance interface for DV-45 equipment, as supported by the optional NT2H35JA MCU.

DV-45 NTP Update R2.02

February 1995 PRS BE89694.

DV-45 NTP Update 94-015

January 1995 CSR XT401482; CSR XT401631; PCN DMT 90-03; PCN DV 92-01-2; PCN DV 93-04; PCN 19940068; PCN 19940120.

Initial NTPFWP02 3.01

April 1993 First Standard release of the

DV-45 Reference Manual

. Includes latestest design changes and comments from the review trial.

May 1992 DV-45A units replaced by equivalent but incompatible DV-45B units. DV-45B features include: broadcast quality option, frame store, improved performance under high BER, digital audio and low speed data interfaces. The orderwire feature was removed, and the DS1 interface unit replaced by the Data Comm Sync (DCS) unit.

August 1990 First release of the DV-45 (DV-45A series).

Revision history

iii



Table 2Record of changed pages and additions

NTP number Pages modified Pages added Pages reissued (no changes)

323-1401-002 1-1 1-2

323-1401-091 ii to iii iv, iv.1, iv.2 i

323-1401-100 iv2-2, 2-3, 2-56-1, 6-2

2-66-4

iii2-1, 2-46-3Back page

323-1401-101 iv, v1-3, 1-42-23-25 to 3-29

vi, viii

3-30

iii, vii

2-1

323-1401-102 iii, iv, v, vi1-2 to 1-42-113-2

vii, viii

Chapter 5 added

1-12-123-1

323-1401-150 iv3-66-1

iv.1, iv.2

7-1 to 7-20

iii3-56-2

323-1401-151 1-1 to 1-32-1 to 2-54-2, 4-3

1-4 to 1-62-6 to 2-8

4-1, 4-4

323-1401-180 1-24-17-5Back page

7-6

1-14-27-1 to 7-4

323-1401-201 iv, v3-37-1, 7-2Replace entire chapter 9

vi

7-5 to 7-8

iii3-4

323-1401-220 iii, iv 2-1, 2-2, 2-5, 2-15, 2-166-1, 6-5 to 6-78-1Back page

v, vi2-17, 2-18

8-8

2-66-2, 6-88-2, 8-7

323-1401-543 iii, ivReplace entire chapter 25-1, 5-4 5-5, 5-6

Chapter 7 added5-2, 5-3

iv

Revision history





iv.1

Contents 1-

About this document v

Release information vReference manual contents viTechnical Support and Information vii

Contents

iv.2



Topical Master Index 323-1401-002 FWP02 3.01NTP Update 94-015 January 1995

1-1

Master index

AAcceptance Tests: 220ACO: 301 1-2; 543 4-9AIS Signal: 543 4-4, 4-5, 4-6Alarms: 102; 1801-2; 301 1-2, 1-4; 543Alarm Outputs: 102 3-1, 4-1; 2017-1Applications: 150Audio: 150 4-1; 1806-1

cabling: 2014-1channels: 1006-2; 1012-5, 2-7, 2-11,2-13processing: 1006-2; 1013-4, 3-11;1806-1specifications: 1806-1

BBidirectional: 1011-3; 1514-1; 2013-2, 4-1Blank Information Cards: 1013-29; 1805-2;

2206-2, 6-5Broadcast Quality: 1006-1, 1013-4, 3-11, 3-16;

1501-1, 2-2; 1805-2algorithm: 1006-1description: 1016-1; 1013-4, 3-11option: 2202-3

CCabling/Connections: 201Clear Alarms: 301 1-4Coder Unit: 1002-4; 1013-4, 3-9; 1505-2;

2202-3Coding Modes: 1004-1, 5-1; 1012-4Configurations: 101 1-1; 1801-1; 2013-1

unidirectional: 1011-1; 1501-3bidirectional: 1011-3; 1501-4drop and insert: 101 1-4

DData Applications: 1013-17; 1504-1Data Comm Sync (DCS) Unit: 1002-5;

1013-16 – 3-19; 1022-6 – 2-8;1502-9, 5-1; 2015-1; 2202-7,5433-2, 4-5, 4-6, 5-4

Decoder Unit: 1002-4; 1022-3, 3-9 – 3-15;2014-4; 2202-5, 3-4; 5434-3, 4-4

DIP Switch Settingscoder unit: 2202-2, 3-2DCS unit: 2202-7decoder unit: 2202-4, 3-4DS-1 interface unit: 2203-6, 3-7MCU unit: 220 2-13, 3-9

Digital Audio: 1013-4, 3-11; 1504-1; 1807-3;2014-2, 4-4; 2202-2, 2-5

Digital Switching: 1502-6Displays, E2A: 102Delta Pulse Code Modulation (DPCM): 1004

6 bit mode: 1004-3; 2015-1; 2202-3, 3-27 bit mode: 1004-3; 2202-3, 3-2

Drop and Insert: 1011-3; 1501-6; 2013-2, 4-1DS-1 applications: 1505-1

field: 1012-3; 2016-2interfaces: 1013-4, 3-11, 3-17; 1807-3;2014-2, 4-4, 5-6, 6-2, 6-3; 5433-7LBOs: 220 2-5, 2-9, 3-7

DS-1 Interface unit: 1013-20; 2016-1DS-1 specifications: 1807-3DS-3 specifications: 1807-1

LBOs: 2202-3, 3-2DVLN: 1503-6; 150 Chapter 7

1-2 Master index


EE2A: 1024-1 – 4-12; 2017-4; 220 2-14, 3-9, 8-4;

3012-1; 5436-1, 6-2Educational Applications: 1503-6End to End transmission: 2206-5Environmental Specifications: 1803-1Equipment

configuration: 101 1; 151 4-1description: 1002-1; 101listing: 1511-1 – 1-3

Electronic News Gathering (ENG): 1503-1

FFaceplates: 101; 102; 3011-1 – 1-6; 543Failures, Unit: 5434-2 – 4-9Frame Store: 1002-4; 1013-11; 1502-5;

2202-5Frame Synchronization: 1013-16; 1502-6Fuses: 1804-1; 543 4-2, 4-4, 4-7, 4-9

GGrounding: 180 4-1; 201 2-10; 220 1-1;

543 1-1; 546 1-1; 547 1-1

IInitial Tests: 220Installation: 201

tools: 2012-2, 2-4, 2-6, 2-8, 2-10, 3-2, 4-2, 4-4, 5-2, 5-4, 5-6 – 5-8, 6-2, 7-3

LLamp Test: 1013-29; 3011-2; 5462-1Loopback: 1014-1; 3011-6; 5434-2

E2A: 3012-2, 2-3

MMechanical Specifications: 1802-1Maintenance: 1006-1; 546Maintenance Control Unit (MCU): 1002-5;

1013-25, 2-25; 1021-3, 1-4, 2-11, 2-12, 3-1, 4-1; 3011-3, 1-4; 5433-8

Major Alarm: 1022-3MCU

upgrade: 2019-1Medical Imaging: 1503-1Minor Alarm: 1022-3Module Replacement: 547Monitor Points: 1012-5

NNTSC Video Standard: 1003-1

OOffice Alarms: 102, 201 7-1Operations: 301Operational Tests: 220Option Settings: 2015-2; 220; 5472-3

DV-45A: 2203-1DV-45B: 2202-1

Ordering Information: 151Orderwire: 1013-29; 2203-4; 3011-5, 1-6

PPower: 1804-1

connections: 201 2-10Point of Use Power Supplies (PUPS): 1013-5, 3-13, 3-18, 3-23, 3-29requirements: 1804-1; 2205-7tests: 2205-7; 5462-1

Pulse Code Modulation (PCM): 1004-3;1013-4

RRemote Alarms: 1001-3; 1-4; 1021-3, 4-3;

180 1-1; 5432-1, 6-1Reset MCU: 3011-4RS-232: 1505-1; 1807-5; 2015-7; 2207-4RS-422: 1505-1; 1807-5; 2015-8; 2207-4

System Description 323-1401-100 FWP02 3.01

iii

ContentsAbout this document vAudience v_______________________________________________________________________________________________________

Introduction to the DV-45 1-1General 1-1

DV-45 and DV-45B 1-2Broadcast quality option – DV-45BQ 1-2

_______________________________________________________________________________________________________

System components 2-1DV-45 shelf assembly 2-1Coder 2-4Decoder 2-4Data Comm Sync (DCS) unit 2-5Maintenance Control Unit (MCU) 2-5_______________________________________________________________________________________________________

NTSC Video Standard 3-1NTSC composite video signal 3-1NTSC waveform 3-2_______________________________________________________________________________________________________

Network Quality Video Coding 4-1Network Quality 4-1Digital coding 4-1Video Compression 4-2VITS Coding 4-3Coding modes 4-3DV-45A Algorithm 4-5Digital Multiplexing 4-5

_______________________________________________________________________________________________________

Broadcast Quality Video coding 5-1BQ Option 5-1

_______________________________________________________________________________________________________

Digital Video Codec DV-45 FWP02 3.01NTP Update DV-45-R3.04 June 1997

iv Contents

DV-45 equipment features 6-1Modularity 6-1On board Power Supplies 6-1Coding modes 6-1Broadcast quality option 6-1Frame store 6-1VITS 6-1Audio 6-2Data Interfaces 6-2DS3 frame synchronization 6-2Monitor points 6-2Maintenance features 6-2Alarm outputs 6-3

_______________________________________________________________________________________________________

FiguresFigure 1-1 Basic digital video codec system 1-1Figure 2-1 DV-45 shelf NT2H50AC, front and rear views 2-3Figure 3-1 Interlaced scanning 3-1Figure 3-2 One line of the NTSC composite video signal 3-3Figure 4-1 Sampling the video waveform 4-1Figure 4-2 Orthogonal sampling (a) vs Field Quincunx

sub-sampling (b) 4-2Figure 4-3 DPCM and error mitigation loops 4-4Figure 5-1 DV-45BQ signal flow 5-2Figure 5-2 DV-45BQ circuit – block diagram 5-2

System Description 323-1401-100 FWP02 3.01

2-1

System componentsThis chapter describes the DV-45 shelf and plug in units.

A diagram of the DV-45 shelf equipped with plug-ins is shown in Figure 2-1. Avideo codec system can include some or all of the following:

• DV-45 shelf assembly

• Coder unit (DV45B or DV-45A)

• Decoder unit (DV45B or DV-45A)

• Data Comm Sync (DCS) unit

• Maintenance control unit (MCU)

• Heat deflector assembly

DV-45 shelf assembly The DV-45 shelf is a light weight steel card cage with a multilayer backplane.Modular plug in units slide along card guides into connectors mounted in thebackplane. The same DV-45 shelf assembly is used with both DV-45A andDV-45B units and provides the same connections.

The shelf has 11 plug-in positions which are keyed to prevent modules from beinginserted into the wrong position. Adjustable mounting brackets allow installationinto either a 482.6 or 584.2 mm (19 or 23 in.) bay without any additional hardware.An ESD jack is provided for anti-static bracelets.

The plug-in slots are designated 0 to 10; this convention will be used throughoutthis manual. Position 0 to 7 in the DV-45 shelf may be equipped with either coders,decoders, or DCS units. There is preferred positioning for coders and decoders in abidirectional configuration. To reflect this, the labeling on the shelf showscoder/decoder for the preferred coder positions and decoder/coder for the preferreddecoder positions. Positions 8 and 9 are for the DS1 interface units (nowdiscontinued). Position 10 is for an optional Maintenance Control Unit (MCU).

2-2 System components


An optional heat deflector can be mounted above the shelf to protect the equipmentmounted above the DV-45 from excess heat. The heat deflector may be mountedbelow the DV-45 to protect it from heat generated by equipment which is locatedlower on the bay. The heat deflector is two mounting spaces in height and may alsobe mounted on a 482.6 or 584.2 mm (19 or 23 in.) bay.

To conform with zone 4 earthquake specifications a locking bar is provided witheach shelf to keep the modules stationary. The locking bar can go across the top orthe bottom of the shelf.

The NT2H50AA shelf is equipped with a 7.5 A fuse and is limited to 5 DV-MPEGunits. The NT2H50AC shelf has been designed to increase the current capacity to15 A and thus enable it to be filled with 8 DV-MPEG units.

System components 2-3

System Description 323-1401-100 FWP02 3.01NTP Update DV-45-R3.04 June 1997

Figure 2-1 (FW-1487)

DV-45 Shelf NT2H50AC, front and rear views

Position # 7 6 5 4 3 2 1 0

Rear view

Position # 0 1 2 3 4 5 6 7 8 9 10

Front view

CodecNo. 1

CodecNo. 2

CodecNo. 3

CodecNo. 4

DS1units unused

MCU

Coder Decoder Coder Decoder Coder Decoder Coder Decoder MCU

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 4 CODEC 3 CODEC 2 CODEC 1

VIDEO & DS3 INPUT / OUTPUT FIELD

PORT 1

PORT 2

RS-232

BAT A

BAT B

DS1 FIELD FUSESRET BAT BAT RET

A B

POWER

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 2 CODEC 1

AUDIO INPUT / OUTPUT FIELD

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

DECODER/CODER CODER/DECODER DECODER/CODER

CODEC 4 CODEC 3

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

ALARMS

AUXILIARY

IN OUT



CoderThe coder unit converts an analog NTSC video signal and 4 audio inputs to a DS3digital output. It is a plug-in module, up to eight can be equipped in a DV-45 shelf.

Two versions of the coder unit are dealt with in this manual: the original DV-45Acoder and the new DV-45B coder. The DV-45B is an improved version of theDV-45 with a superior coding algorithm. Features of the DV-45B coder include:

• Improved video performance

• Broadcast Quality option - DV-45 BQ

• Error Mitigation

• VITS extended to line 10

• DS1 Digital Audio input

The two versions (DV-45A and DV-45B) are not interchangeable, a DV-45A coderrequires DV-45A decoders, a DV-45B coder requires DV-45B decoders. TheBroadcast Quality option is not available for the DV-45A. The orderwire feature ofthe DV-45A has been discontinued.

The coder unit can operate stand-alone. Alarms are displayed on the unit faceplate,or an optional MCU unit can be used to provide remote alarming abilities.

DecoderThe decoder unit performs the inverse of the coder unit. It converts the DS3 digitalinput back into a video signal and 4 audio outputs. Up to eight of these plug-inmodules can be equipped in a DV-45 shelf.

DV-45A decoders are compatible with the signal from a DV-45A coder. Likewise,DV-45B coders are required for DV-45B decoders. Features of the DV-45B decoderinclude:

• improved video performance

• broadcast quality option - DV-45 BQ

• frame store option

• error mitigation

• VITS extended to line 10

• DS1 Digital Audio output

The Broadcast Quality option and the Frame Store are not available for theDV-45A. The orderwire feature of the DV-45A has been discontinued.

Decoder units can operate stand-alone. Alarms are displayed on the unit faceplate,or an optional MCU can provide remote alarming abilities.

Data Comm Sync (DCS) unitThe Data Comm Sync unit inserts low speed data into the DS3 along with the videoand audio traffic. The DCS unit can be installed in any coder or decoder position.The audio connectors on the shelf rear are used as connections for the low speeddata. DS1, RS-232 and RS-422 interfaces are supported.

The DCS performs DS-3 frame alignment for seamless switching. Hits on the DS-3will be removed and will not propagate into the downstream transmissionequipment. Data services can either be enabled and data inserted into the DS3 or theDCS can pass-thru all of the contents of the DS3.

Maintenance Control Unit (MCU)The optional maintenance control unit (MCU) communicates with the other units ina DV-45 shelf and provides alarm and status information for the entire shelf.

The MCU provides major and minor relay closures for office alarms and an E2ATBOS alarm interface. Two E2A mappings are provided using the same alarminformation as on the unit faceplates.

A new software release has been created to work with both DV-45B and DV-45Aunits. Any previous version of NT2H35 MCU can be upgraded to the NT2H35KAby changing the firmware load.

System components 2-5





6-1

DV-45 equipment featuresThe DV-45 Digital Video Codec offers numerous equipment features.

ModularityDV-45 shelves and modules are designed for easy configuration. Eight slots areprovided for either coder, decoder or DCS units and any mix can be supported.This modularity allows a system using DV-45A units to be upgraded to DV-45B.Future enhancements will also take advantage of the ability to upgrade.


On board Power SuppliesAll DV-45 circuit packs contain their own power supply to convert the 48 voltoffice supply to the voltages required by the unit. No power converter units arerequired. A and B redundant power connections are provided. Reverse batteryprotection prevents damage from reversed battery connections.

Coding modesThree standard network quality coding modes are provided by both DV-45A andDV-45B units: 7 bit DPCM and 6 bit PCM and 7 bit PCM.

Broadcast quality optionTo provide superior video performance a broadcast quality option is available forDV-45B coder and decoder units. The feature is a factory installed daughterboardon the main PCB. Coders and Decoders with this option are called DV-45 BQ units.

Frame storeThe Frame Store (FS) option is available for the DV-45B decoder unit. Theoptional board stores the data from two frames of video. If the video or DS3 signalis interrupted by a transient or a permanent signal loss, the decoder will output thelast field of video information with proper NTSC field sequence.

6-2 DV-45 equipment features


VITSThe VITS lines are coded differently from active video to ensure transparency. TheDV-45B can carry time code, test signals and control information on lines 10 to 21inclusive. The DV-45A provides transparency on lines 15 to 21.

AudioFour high quality audio channels are combined with the video signal into the DS3.Each channel is a balanced 600 Ω interface with a bandwidth of 15 KHz.Connections are made to the audio program connectors for each slot.

The DV-45B provides 4 analog audio channels but these may be turned off to allowdirect input of a standard digital DS1 signal. The DS1 may carry data or controlinformation instead of audio.

Some DV-45A units were constructed with 2 channels and 0 channels (See323-1401-101 for a listing of units).

Data interfacesIn addition to the DS1 digital audio channel of the coders and decoders the DCSunit can provide an additional 4 DS1s capacity. The unit can be configured toprovide low speed RS-232 and RS-422 data channels at a variety of rates andprotocols.

DS3 frame synchronizationDigital switching frequently causes hits on the DS-3, frame loss and error bursts.The optional DCS unit will remove these hits and prevent them from propagatingthrough the digital network. Data services can either be provided or disabled.

Monitor pointsThe DV-45 shelf provides monitor points for the video and digital DS3 signals ofthe coders and decoders. The 10K ohm audio monitors of the DV-45A have beenremoved from the DV-45B.

Maintenance featuresThe maintenance loopback feature allows craftspeople to loop back the audio andvideo information from a remote site to verify signal continuity. The loopback canbe disabled on the decoder unit.

Black signal generation upon loss of video signal is a standard feature of bothDV-45A decoders. In the DV-45B decoder the Frame Store feature allows output ofthe last video frame.

Lamp test and Learn out are provided by the optional MCU. The order wire featureof the DV-45A has been discontinued.

System Description 323-1401-100 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996

Alarm outputsEach coder, decoder, and DCS unit has its own on-board processor for alarmdiagnostics. The units can operate stand-alone and will display alarms using LEDson the module faceplates.

An optional MCU provides remote alarm interfaces: relay closures, E2A-TBOS,and TL1. The MCU collects alarms from each module and stores them in memory.Contact relays output normally open (NO) and normally closed (NC). Remotealarms are available via the E2A or TL1 interface.

Two E2A mappings are now available on the MCU. Mapping 1 requires twodisplays per shelf with local alarms in the first display and remote alarms in thesecond display. Mapping 2 assigns half a display per unit and requires four displaysper shelf. The alarm points are the same as the LED indications on the modules.

A loss of video signal alarm can be disabled on the new MCU. This is useful ifoccasional video service is required. Remote alarms can also be disabled.

DV-45 equipment features 6-3

6-4 DV-45 equipment features



Digital Video CodecDV-45System Description

© 1990, 1992, 1993 Northern TelecomAll rights reserved.Information subject to change without notice.DV-45 is a trademark of Northern Telecom323-1401-100Release FWP02 3.01April 1993Printed in Canada.

Signal Flow and Circuit Pack Descriptions 323-1401-101 FWP02 3.01

iii

ContentsAbout this document viiAudience vii_______________________________________________________________________________________________________

Signal flow 1-1Signal flow in a video link 1-1

Transmit direction 1-2Receive direction 1-2

Bidirectional configuration 1-3Drop and Insert 1-4_______________________________________________________________________________________________________

Interface Connections 2-1Coder unit 2-2Decoder unit 2-3DCS unit 2-3DS1 field 2-3MCU connections 2-3Video program monitors 2-4Digital monitor points 2-4Audio program monitors 2-4_______________________________________________________________________________________________________

Circuit pack description 3-1DV-45B coder circuit pack (NT2H03) 3-2

Coder video processing section 3-2Broadcast quality option 3-4Audio processing section 3-4Digital output section (DS3) 3-5Microcontroller section 3-5Coder PUPS section 3-5Faceplate layout and LED definitions 3-5

DV-45A coder circuit pack (NT2H01) (discontinued) 3-7Signal flow 3-7

DV-45B decoder circuit pack (NT2H04) 3-9Digital input section (DS3) 3-9Video processing section 3-11Broadcast quality option - DV-45BQ 3-11Frame store (FS) option 3-11Audio processing section 3-11Microcontroller section 3-13PUPS 3-13Faceplate layout and LED definitions 3-13

iv Contents

Digital Video Codec DV-45 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996

DV-45A decoder circuit pack (NT2H02) (discontinued) 3-15Signal flow 3-15

Data Comm Sync unit (NT2H31) 3-16DS3 interface 3-16M1-2 Muldem 3-17Low speed Data interfaces 3-17Selection Logic 3-18Microcontroller Section 3-18PUPS 3-18Faceplate layout and LED definitions 3-18

DS1 interface circuit pack (NT2H30) (discontinued, optional) 3-21Transmit direction 3-21Receive direction 3-21Loopback 3-23Microcontroller Section 3-23PUPS 3-23Faceplate layout and LED definitions 3-23

Maintenance control unit circuit pack (NT2H35) (optional) 3-25Maintenance bus (MBus) 3-25Remote alarms 3-26External interfaces 3-26Central processing unit (CPU) 3-28Lamp test 3-28Reset and learn-in 3-28Orderwire (MCU) 3-28Maintenance control unit power supply section 3-28Faceplate layout and LED definitions 3-28

Blank information cards (NT2H39) 3-30_______________________________________________________________________________________________________

Maintenance Loopback 4-1Loopback 4-1

_______________________________________________________________________________________________________

FiguresFigure 1-1 Unidirectional DV-45 codec system – block diagram 1-1Figure 1-2 Bidirectional video system – block diagram 1-3Figure 1-3 Drop/Insert codec system – block diagram 1-4Figure 2-1 DV-45 shelf backplane 2-2Figure 2-2 DV-45 monitor connections 2-6Figure 3-1 DV-45B coder circuit pack – block diagram 3-3Figure 3-2 DV-45A and DV-45B coder module faceplate layout and LED

definitions 3-6Figure 3-3 DV-45A coder circuit pack – block diagram 3-8Figure 3-4 DV-45B decoder circuit pack – block diagram 3-10Figure 3-5 DV-45A and DV-45B decoder module faceplate layout and LED

definitions 3-12Figure 3-6 DV-45A decoder circuit pack – block diagram 3-14Figure 3-7 Data Comm Sync unit block diagram 3-19Figure 3-8 Data Comm Sync faceplate layout and LED definitions 3-20Figure 3-9 DS1 interface circuit pack — block diagram 3-22Figure 3-10 DS1 interface unit with DV-45A bidirectional system 3-22

Figure 3-11 DS1 interface faceplate layout and LED interpretation 3-24Figure 3-12 Maintenance control unit (MCU) – block diagram 3-27Figure 3-13 MCU faceplate layout and LED interpretation 3-29Figure 4-1 Loopback feature for a directional codec system 4-2_______________________________________________________________________________________________________

TablesTable 3-1 DV-45B coder circuit packs 3-2Table 3-2 Coding modes 3-4Table 3-3 DV-45A coder circuit packs 3-7Table 3-4 DV-45B decoder circuit packs 3-9Table 3-5 DV-45A decoder circuit packs 3-15Table 3-6 Data Comm Sync unit circuit pack 3-16Table 3-7 DS1 interface units 3-21Table 3-8 MCU modules 3-25Table 3-9 Blank information cards 3-29

About this document v

Signal Flow and Circuit Pack Descriptions 323-1401-101 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996

vi Contents



vii

About this documentThis document describes the signal flow in the DV-45. DV-45A and DV-45Bmodules are described, supported by functional block diagrams, and figures of thefaceplate for each circuit pack. Tables list product codes for each unit.

AudienceThis document is intended for the following people:

• planners

• provisioners

• network administrators

• transmission standard engineers

• maintenance personnel

It serves as a helpful description for anyone working with the DV-45 Digital VideoCodec equipment.

viii About this document


Signal Flow and Circuit Pack Descriptions 323-1401-101 FWP02 3.01NTP Update DV-45-R3.04 June 1997

Signal flow 1-3

Bidirectional configurationA bidirectional configuration (Figure 1-2) is more than just two unidirectionalsystems going in opposite directions. The coder and decoder slots in the DV-45shelf are paired so that the coder unit is placed in a position labeled Coder/Decoderand the decoder in the adjacent slot labeled Decoder/Coder. The NT2H35AA MCUis optioned to recognize the units as a bidirectional pair, the NT2H35CA and laterwill recognize the configuration automatically.

A bidirectional system offers a maintenance loopback and remote alarm features.When in loopback the analog video and audio from the decoder unit are routed tothe coder unit for retransmission along the return path. Remote alarms are availablethrough the optional MCU unit.


Bidirectional video system – block diagram

Coder

Decoder

Decoder

Coder

DS3 Radio/FiberTransport Network

Video/Audio In

Video/Audio Out

DV-45 Shelf, Term A

Video/Audio Out

Video/Audio In

DV-45 Shelf, Term B

1-4 Signal flow


Drop and InsertA drop and insert coder system is shown in Figure 1-4. A DCS unit has been addedto the system to provide low speed data interfaces. The DCS does so by droppingand inserting data from the DS3. The coder unit must be optioned for 6 bit DPCMcoding.

The maintenance loopback and remote alarm features are provided in drop/insert.The coder, decoder and DCS units occupy slots 0, 1 and 2 respectively or slots 4, 5and 6. This configuration is valid for both DV-45A and DV-45B. The NT2H35CAand later will recognize the configuration automatically.


Drop/Insert codec system – block diagram

Decoder

DCSUnit

Coder

Decoder

DCSUnit

Coder

DS3 Radio/FiberTransport Network

Video/Audio Out

DataIn/Out

Video/Audio In

DV-45 Shelf, Term A

Video/Audio Out

DataIn/Out

Video/Audio In

DV-45 Shelf, Term B


2-1

Interface connectionsThis chapter provides the interface connections for all the plug-in units.

A DV-45 shelf can contain up to 11 circuit packs (plug-in modules): eight coder,decoder or DCS modules, two optional DS1 interface modules (DV-45A only) andan optional MCU. A customer interface panel on the DV-45 shelf's backplane(Figure 2-1) provides terminations for interfacing with power, video, audio, DS1,DS3, orderwire, and alarm signals. Power is a redundant -48 Volt supply.

The first eight positions in the DV-45 shelf may be equipped with either coders,decoders or DCS units. Each slot provides video, audio, and DS3 connections at therear of the shelf. Connections are labelled to reflect both uses. If a coder unit isequipped, then the video and audio connections are inputs, and the DS3 connectionis an output. If the same position is equipped with a decoder, then the DS3connection is an input and the audio and video connections are outputs.

DCS units use these same connections for digital interfaces. The video input/outputconnectors connect DS-3 signals from the coder decoder or switch equipment. Theaudio connections become data interfaces for T-1, RS-232 or RS-422 transmission.


2-2 Interface connections


DV-45 shelf backplane

Coder unitThe coder unit provides the following interfaces:

• Video signal input – NTSC composite signal, 1.0 v. p-p.

• Video signal monitor – for looping the input signal to other equipment.

• DS3 output – digital output signal at 44.736 Mb/s.

• DS3 monitor – second digital output signal at 44.736 Mb/s for transmission ortest purposes.

• Audio program inputs – 600 ohm balanced, with ground connections.

• Digital audio input - Tip, Ring, Ground wire-wrap pins.

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR




PORT-1

PORT-2

RS-232

BAT A

BAT B


A B

POWER

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G




GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

ALARMS

AUXILIARY

IN OUT

Signal Flow and Circuit Pack Descriptions 323-1401-101 FWP02 3.01NTP Update DV-45-R3.04 June 1997

Circuit pack description 3-25

Maintenance control unit (MCU) circuit pack (NT2H35) (optional)Table 3-8 briefly describes DV-45 MCUs and lists their corresponding productengineering codes (PEC).The maintenance control unit (MCU) is the alarm unit forthe DV-45. The MCU is optional and occupies position 10 in the DV-45 shelf. TheDV-45 shelf backplane allows the MCU to communicate with the other units byway of an internal maintenance bus (M-Bus).

Table 3-8MCU modules

The NT2H35CA and later contain software compatible with DV-45A and DV-45Bcircuit packs. The NT2H35AA can be upgraded to the NT2H35KA by changing theEPROM firmware chips. The new MCU offers two selectable alarm mappings,alarm enable/disable options and support for DVLN educational application.

Both versions of the MCU perform the same functions of gathering alarms frominside the DV-45 shelf and outputting them to the outside world. Figure 3-10 showsa block diagram of the MCU.

Maintenance Bus (MBus)Each DV-45A and DV-45B plug-ins has its own microcontroller to performdiagnostics and detect alarms. These microcontrollers are sufficient to operatestand-alone and drive alarm and status LEDs on the unit faceplate. The MCUcommunicates with all of the units in the shelf by means of an internal maintenancebus (MBus) to collect this information.

Alarms are polled from each unit in succession and collected by the MCU. Toprevent silent alarms, slot sensors are provided to indicate whether there is amodule equipped in the shelf position or not. The same alarm conditions shown ona module faceplate are sent to the MCU which decides if the alarm is a major or aminor alarm condition, or not an alarm at all.

PEC No. Description

NT2H35AA Maintenance control unit (DV-45A)NT2H35CA and later Maintenance control unit (DV-45A and DV-45B)


3-26 Circuit pack description

The MBus allows the MCU to communicate to the individual plug-ins. Forexample, a remote loopback request can be sent to a coder unit for execution. Thisprovides the potential for future enhancements such as remote provisioning andsynchronization features.

Remote alarmsCoder units at the remote sites transmit their alarms by means of the X-bits of theDS3 stream. These X-bits are received by the decoder and collected by the MCU. Ifa codec pair is configured as a bidirectional channel, then the MCU will add thealarms of the associated decoder to the remote alarm transmission.

At a drop/insert site, the MCU will gather alarms for all three of the units in theconfiguration. The information will be transmitted via the X-bits of the DCS unit.

Note:Remote alarms do not effect the DV-45 TL1 alarm interface.

External interfacesThe system alarm and status information is stored in the memory of the MCU. TheMCU decides if the alarm is a major or minor alarm condition, or not an alarm atall. The MCU outputs this information via the faceplate display, relay closures,E2A interface, and TL1 alarm interface.

Major and minor alarms activate a dry contact relay. These relays have bothnormally open (NO) and normally closed (NC) outputs; they are isolated, floatingwith respect to ground. Separate outputs are provided for alarm cut-off (ACO) ofaudible alarms. LED indicators on the MCU faceplate also show the presence ofmajor and minor alarms.

Complete alarm and status information is stored in the memory of the MCU and isavailable through a standard E2A interface. An external alarm scanner can accessthis information for customer use. The MCU can accept remote controls toloopback on any bidirectional codec channel via the same E2A interface.

The stored alarm and status information is also available through a Bellcorecompliant DV-45 TL1 alarm surveillance interface. An external TL1 operationssystems (OS) can access this information for customer use.

The MCU contains RS-232 driver circuits connected to two DB-25 connectors atthe rear of the DV-45 shelf. They support the TL1 alarm interface for DV-45network elements (NEs). Presently not implemented, a CRT interface may beprovided as a future enhancement. The E2A2 port is used as a computer interfacefor DVLN educational applications.



Figure 3-12 (FW-0288)

Maintenance control unit (MCU) – block diagram

E2A1 SerialInterface

(TBOS - AlarmsStatus and Control)

Slots sensors(equipped/non

equipped status )

MBus Interfaceto/from individual

circuit packs

Alarm cutoff(ACO)

Lamp testbutton

ROM FW


(DVLN applications)

Major and MinorRelays

WatchdogTimer

DIP Switches

FaceplateLEDs

Battery A & Bsupplies

(Power fail alarms)

Intel 80C186 CPU

RAMMemory

TL1 alarmsurveillance

interface



Central processing unit (CPU)An Intel 80C186 microprocessor is at the heart of the MCU. Its operationalsoftware is stored as firmware in ROM chips on the MCU board. These chips havesockets to allow field upgrades of software.

The microprocessor performs self-check diagnostics and can declare its unit asfailed if it detects circuit failures or memory defects. A watchdog timer preventssilent failures.

Lamp testPressing the Lamp Test pushbutton on the MCU will cause it to first extinguish allof the MCU LED indicators and then illuminate them. The unit to the left on theshelf will go through the same cycle unit until all of the modules have done a lamptest. Failure of any unit to react to the lamp test may indicate MBus failures.

Reset and learn-inIn order to learn-in a new configuration of plug-in or to clear alarms, either a learn-in or a reset can be performed by way of the MCU faceplate. A reset implies are-initialization of the software and can cause time-outs on the E2A port. Trafficwill not be affected.

Orderwire (MCU)The orderwire feature has been removed from the DV-45. The selector button andorderwire indicators now have no function.

Maintenance control unit power supply sectionThe MCU circuit pack is equipped with its own power supply. The power supplyconverts the -48 V dc supplied to the DV-45 shelf to the regulated +5 V, -5 V,+15 V, and -15 V levels required by the MCU circuitry.

The power supply is fed by redundant, independently fused, A and B officesupplies. The MCU provides a display indicator for A or B battery failure. Reversebattery protection prevents damage from reversed battery voltage.

Faceplate layout and LED definitionsThe MCU faceplate is shown in Figure 3-13. Definitions are provided for the LEDindicators. The orderwire feature has been discontinued and the order wire controlsand indicators have no function.



Figure 3-13 (FW-0289)

MCU faceplate layout and LED interpretation

Major LED (Red)A service affecting alarm has occurred in the DV-45 shelf.

Minor LED (Yellow)A non-service-affecting alarm has occurred in the DV-45 shelf.

ACO LED (Red)Audible alarms have been silenced.

BAT A LED (Red)Battery A input to the DV-45 shelf has failed.

BAT B LED (Red)Battery B input to the DV-45 shelf has failed.

Rem LED (Green)An alarm has occurred at a remote site.

Orderwire C/D 1, 2, 3, or 4 LEDs (Green) Orderwire for codec 1, 2, 3 or 4 has been selected (using the SELECT button).Orderwire feature discontinued.

On LED (Green) The module is powered up.

Fail LED (Red)Hardware failure.

UNIT

ON

FAIL

ALARMCONTROL

SHELFALARM

MINORMAJOR

ACO

LAMP TEST

ALARMSTATUS

BAT B

BAT A

REM

ORDERWIRE

C/D 2

C/D 1

C/D 3

C/D 4

SELECT

JACK



Blank information cards (NT2H39)Blank information cards consist of a blank printed circuit board and faceplate. Theyare to be added to all unused positions to guarantee compliance with EMIrequirements and for cosmetic reasons. Table 3-9 lists blank information cards andtheir corresponding product engineering codes (PEC).

Table 3-9Blank Information cards

PEC no. Description

NT2H39AA Double width blank card, for unused coder and decoderpositions.

NT2H39BA Single width blank card for unused DS1 or MCU position.

Alarms and Surveillance 323-1401-102 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996

iii

ContentsAbout this document viiAudience vii_______________________________________________________________________________________________________

Alarm surveillance system overview 1-1System Architecture 1-1Maintenance Control Unit 1-3Alarms 1-3_______________________________________________________________________________________________________

Circuit pack alarm definitions 2-1NT2H03 and NT2H01 Coder Unit Alarms 2-2NT2H04 and NT2H02 Decoder Unit Alarms 2-4NT2H31 DCS Unit Alarms 2-6NT2H30 DS1 Interface Unit 2-9NT2H35 Maintenance Control Unit 2-11_______________________________________________________________________________________________________

Parallel alarm interface (Relay Outputs) 3-1Maintenance control unit 3-1Relay outputs 3-1_______________________________________________________________________________________________________

Serial alarm interface (TBOS - E2A) 4-1Maintenance control unit 4-1E2A serial alarm port 4-1DV-45 E2A Mappings 4-2Interpreting E2A alarm displays 4-3Troubleshooting with E2A 4-4

E2A Mapping 1.0 4-5E2A Mapping 2.0 4-8

_______________________________________________________________________________________________________

TL1 alarm surveillance interface 5-1TL1 overview 5-1NT2H35KA maintenance control unit 5-1TL1 implementation on DV-45 equipment 5-2

Standards compliance 5-3TL1 connectivity 5-5


iv Contents

TL1 data flow 5-6TL1 message overview 5-9

Autonomous TL1 messages 5-12TL1 message notation 5-12REPT ALM (report alarm) 5-13REPT EVT (report event) 5-14

Non-autonomous TL1 messages 5-15TL1 message notation 5-15RTRV-ALM (retrieve alarm) 5-16RTRV-COND (retrieve condition) 5-18RTRV-HDR (retrieve header) 5-10RTRV-EQPT (retrieve equipment) 5-22

Message parameters 5-24AID 5-25AIDTYPE 5-26ALMCDE 5-26ATAG 5-26CONDEFF 5-27CONDDESCR 5-27CONDTYPE 5-27CTAG 5-28DATE 5-28DIRN 5-28NTFCNCDE 5-29SCCM 5-29SID 5-30SPECIFIC BLOCK 5-30SRVEFF 5-30STATE BLOCK 5-30TID 5-31TIME 5-31TYPEREP 5-31

Error codes 5-32Summary of supported DV-45 TL1 AID parameters and surveillance alarms 5-34_______________________________________________________________________________________________________

Figures

Figure 1-1 DV-45 surveillance architecture 2-3Figure 1-2 Function of the maintenance control unit (MCU) Ð general

block diagram 2-4Figure 2-1 Coder faceplate description 2-3Figure 2-2 Decoder faceplate description 2-5Figure 2-3 Data Comm Sync faceplate description 2-8Figure 2-4 DS1 interface faceplate description 2-10Figure 2-5 MCU faceplate description 2-12Figure 3-1 Relay closure contacts 3-1Figure 3-2 Alarm relay contact connections 3-2Figure 4-1 E2A port transmission parameters 4-1Figure 4-2 E2A Version 1.0 General Alarm Mappings (Local Alarms/Status) 4-6Figure 4-3 E2A Version 1.0 General Alarm Mappings

(Remote Alarms/Status) 4-7

Figure 4-4 E2A Version 2.0 General Alarm Mappings (Unit #0, #1 Alarms/Status) 4-9




Figure 5-1 Example configuration for remotely monitoring DV-45 TL1 alarms 5-4Figure 5-2 Example configuration for locally monitoring DV-45 TL1 alarms 5-4Figure 5-3 DV-45 TL1 alarm data flow 5-9Figure 5-4 DV-45 TL1 message header examples 5-10_______________________________________________________________________________________________________

TablesTable 5-1 Autonomous DV-45 TL1 message types 5-12Table 5-2 Non-autonomous DV-45 TL1 message types 5-15Table 5-3 TL1 surveillance message parameters 5-24Table 5-4 Summary of TL1 AID parameters and surveillance alarms supported

by the NT2H35KA MCU for DV-45 circuit packs 5-34Table 5-5 TL1 AID parameters supported for DV-45B coders 5-36Table 5-6 TL1 surveillance alarms supported for DV-45B coders 5-36Table 5-7 TL1 AID parameters supported for DV-45B decoders 5-36Table 5-8 TL1 surveillance alarms supported for DV-45B decoders 5-36Table 5-9 TL1 AID parameters supported for DV-45 DCS units 5-37Table 5-10 TL1 surveillance alarms supported for DV-45 DCS units 5-37Table 5-11 TL1 AID parameters supported for DV-45 MCUs 5-37Table 5-12 TL1 surveillance alarms supported for DV-45 MCUs 5-37Table 5-13 TL1 AID parameters supported for DV-45 OC3 line interface

units 5-38Table 5-14 TL1 surveillance alarms supported for DV-45 OC3 line interface

units 5-38Table 5-15 TL1 AID parameters supported for DV-45B BTSC coders 5-39Table 5-16 TL1 surveillance alarms supported for DV-45B BTSC coders 5-39Table 5-17 TL1 AID parameters supported for DV-45B BTSC decoders 5-39Table 5-18 TL1 surveillance alarms supported for DV-45B BTSC

decoders 5-39Table 5-19 TL1 AID parameters supported for DV-45 Music-E45

multiplexers 5-40Table 5-20 TL1 surveillance alarms supported for DV-45 Music-E45

multiplexers 5-40Table 5-21 TL1 AID parameters supported for DV-45 Music-E45

demultiplexers 5-40Table 5-22 TL1 surveillance alarms supported for DV-45 Music-E45

demultiplexers 5-40Table 5-23 TL1 AID parameters supported for DV-45 Games-S45

multiplexers 5-41Table 5-24 TL1 surveillance alarms supported for DV-45 Games-S45

multiplexers 5-41

Contents v


vi Contents


Table 5-25 TL1 AID parameters supported for DV-45 Games-S45 demultiplexers 5-41

Table 5-26 TL1 surveillance alarms supported for DV-45 Games-S45 demultiplexers 5-41

Table 5-27 TL1 AID parameters supported for DV-45 Stereo-FM45 multiplexers 5-42

Table 5-28 TL1 surveillance alarms supported for DV-45 Stereo-FM45 multiplexers 5-42

Table 5-29 TL1 AID parameters supported for DV-45 Stereo-FM45 demultiplexers 5-42

Table 5-30 TL1 surveillance alarms supported for DV-45 Stereo-FM45 demultiplexers 5-42


vii

About this documentThis document provides details on the alarms and surveillance features availablewith the DV-45. Topics covered include alarm definitions, and external alarm interfaces.

AudienceThis document is for the following people:

¥ planners

¥ provisioners

¥ network administrators

¥ transmission standards engineers

¥ maintenance personnel

viii Contents


Alarms and Surveillance 323-1401-102 FWP02 3.01

1-1

Alarm surveillance system overviewThis chapter introduces the alarm surveillance system of the DV-45.

System architectureThe DV-45 provides the user with information to quickly troubleshoot and maintaina codec system. Figure 1-1 shows a block diagram of the surveillance architectureof the DV-45.

All DV-45 units contain on-board microcontroller units that perform control andsurveillance functions, as well as detect and diagnose alarms. Alarms are displayedon the unit faceplate. Each microcontroller uses firmware which directs itsoperation. The firmware is stored in erasable programmable read only memory(EPROM) chips.

Software upgrades can be accomplished by changing EPROM chips. The ICs aresocketed to allow field upgrades. The firmware loads are designed to operate oneparticular unit only, thus the coder firmware cannot be used in a decoder and thedecoder software cannot be used in a DCS unit.

1-2 Alarm surveillance system overview


Figure 1-1 (FW-0295.1)

DV-45 surveillance architecture

Local alarmsTx DS3 X-bits

µControllerRest of

Coder Unit

Loopbackrequest

LEDs onfaceplate

Coder unit

µController Rest of Unit

LEDs onfaceplate

Optional DCS unit

Remote alarmsRx DS3 X-bits

µControllerRest of

DecoderUnit

LEDs onfaceplate

Decoder unit

Maintenance Bus - MBus

DS-3 X-bitsremote alarms

µControllerRest of

MCU unit

E2Aserial

interface

Alarmrelays

TL1surveillance

interface

E2A portlocated onbackplane

Dry contactsurveillance

pointslocated onbackplane

RS-232port located

on backplane

E2A alarmscannersystem

Relayalarm

system

TL1operations

system

LEDs onfaceplate

MCUDV-45 shelf

FW-0295.1

Maintenance control unit The maintenance control unit (MCU) is an optional plug-in for the DV-45. It gathersalarms from each of the DV-45 plug-ins, classifies the alarm as a major or minoralarm condition, and outputs these alarms over a parallel (relay closure), serial (E2ATBOS),and TL1 alarm interface.

The alarm information gathered is the same as the LED indications from the modulefaceplate. Alarms for a remote coder are transmitted by way of the X-bits of theDS3 stream. If the coder is part of a bidirectional video link, the alarms from thedecoder unit are added. Remote alarms can be disabled on the NT2H35CA MCU.

Note: Remote alarms do not effect the DV-45 TL1 alarm interface.

AlarmsThe alarms are classified into three categories: major, minor, and remote. Majorand minor alarms appear as an LED, a normally open (NO) or normally closed (NC)relay output, an alarm point on the TBOS mapping, and TL1 messages in the DV-45TL1 alarm interface.

MajorA major alarm is raised by one or more of the following conditions:

• video sync loss on a coder or decoder unit when enabled

• DS3 frame loss (reported by the decoder or DCS unit)

• a local loopback is in effect

• hardware failure

• battery A or B failure

• A or B shelf fuse blown

• power supply failure on any of the units

MinorA minor alarm is raised by one or more of the following conditions:

• DS1 interface unit fail

• Data Degrade on a DCS unit

RemoteA remote alarm is raised by one or more of the following conditions:

• an alarm condition is in effect on a remote unit

• a remote loopback is initiated in one or more units

Alarm surveillance system overview 1-3


1-4 Alarm surveillance system overview



Function of the maintenance control unit (MCU) – general block diagram


(TBOS - AlarmsStatus and Control)

Slots sensors(equipped/non

equipped status )

MBus Interfaceto/from individual

circuit packs

Alarm cutoff(ACO)

Lamp testbutton

ROM FW


(DVLN applications)

Major and MinorRelays

WatchdogTimer

DIP Switches

FaceplateLEDs

Battery A & Bsupplies

(Power fail alarms)

Intel 80C186 CPU

RAMMemory

TL1 alarmsurveillance

interface

NT2H35 maintenance control unitThe MCU is an optional unit for alarm display. It gathers alarms and status fromthe other plug-ins and interprets them as major or minor. Relay closures, E2ATBOS interfaces, and TL1 alarm surveillance interfaces are provided by the MCU.A functional block diagram of an MCU follows:

(FW-1778)

Alarm indications are as follows:

Indication Colour Explanation

Shelf AlarmMajor Red Major alarm condition

Minor Yellow Minor alarm condition

Alarm ControlACO Red Alarm cut off active

Alarm StatusBAT A Red Failure of battery A

BAT B Red Failure of battery B

Rem Green Alarm at remote site

OrderwireC/D 1-4 Green No function

UnitOn Green Power is on

Fail Red Failure of module

E2A1

PowerA

B

Maj/MinRelays

ACO

DS1 No. 2

DS1 No. 1

Unit No. 7

Unit No. 1

Unit No. 0MBus TL1

E2A2

Circuit pack alarm definitions 2-11


2-1`2 Circuit pack alarm definitions



MCU faceplate description

Major LED (Red)A service affecting alarm has occurred in the DV-45 shelf.

Minor LED (Yellow)A non-service-affecting alarm has occurred in the DV-45 shelf.

ACO LED (Red)Audible alarms have been silenced.

BAT A LED (Red)Battery A input to the DV-45 shelf has failed.

BAT B LED (Red)Battery B input to the DV-45 shelf has failed.

Rem LED (Green)An alarm has occurred at a remote site.

Orderwire C/D 1, 2, 3, or 4 LEDs (Green) Orderwire for codec 1, 2, 3 or 4 has been selected (using the SELECT button).Orderwire feature discontinued.

On LED (Green) The module is powered up.

Fail LED (Red)Hardware failure.

UNIT

ON

FAIL

ALARMCONTROL

SHELFALARM

MINORMAJOR

ACO

LAMP TEST

ALARMSTATUS

BAT B

BAT A

REM

ORDERWIRE

C/D 2

C/D 1

C/D 3

C/D 4

SELECT

JACK


3-1

Parallel alarm interface (Relay Outputs)This chapter describes the relay output interface available on the DV-45 codec.

Maintenance control unitThe optional maintenance control unit (MCU) provides an E2A serial port andrelay closure outputs.

Relay outputsRelay closure contacts are available at the rear of the DV-45 shelf (refer to Figures3-1 and 3-2). These relays provide four alarm outputs: major audible, major visual,minor audible and minor visual. Only local alarms will generate a major or minoralarm.

Each relay output consists of three leads: common (COM), normally open (NO),and normally closed (NC). These contacts are driven by the MCU and are undersoftware control. NO shorts to COM to output an alarm, and NC opens a circuit tooutput an alarm.

Upon a power failure, both major and minor alarms (visual and audible) will beactivated. Alarm cut-off (ACO) contacts are available to silence both major andminor audible alarms. The ACO is operational even if there is a failure of the localpower supply or of one -48 V feed.

Figure 3-1 FW-2240

Relay closure contacts

MajorVisual

NO

COM

NC

MinorVisual

NO

COM

NC

MajorAudible

NO

COM

NC

MinorAudible

NO

COM

NC

ExtACO

BatRet

GndDet

3-2 Parallel alarm interface



Alarm relay contact connections

ALARMS

MON1MON2NOC

NCNO

CNCEXT ACO

BAT RETNOC

NCNO

CNC

MAJVISMAJAUD

MINVISMINAUD

T+T-R+R-T+T-R+R-

12345678

E2A1E2A2

OW

JACK


Revised for DV-45 FWP02 3.03 Addendum January 1997

5-1

TL1 alarm surveillance interface 5-

This chapter describes the DV-45 Transaction Language 1 (TL1) alarm surveillance interface supported by the optional NT2H35KA maintenance control unit (MCU).

Note:

A right-to-use (RTU) TL1 software license (PEC NT2H98AA) must be purchased from Northern Telecom for each DV-45 shelf configuration supporting TL1 alarm surveillance.

TL1 overview

TL1 is a common language protocol for messages exchanged between network elements (NEs) and an operations system (OS) within a telecommunications network used to support network surveillance, provisioning, and control functions. TL1 allows an OS to communicate with different vendor’s equipment through the common language protocol, thereby eliminating the need to support vendor-specific interfaces.

NT2H35KA maintenance control unit

The NT2H35KA MCU is an optional circuit pack that supports the following alarm surveillance outputs and interfaces for the DV-45 Digital Video Codec system:

• normally open (NO) and normally closed (NC) relay outputs

• industry-standard E2A telemetry byte oriented serial (TBOS) alarm interface

• Bellcore-compliant DV-45 TL1 alarm surveillance interface

Note:

Implementing TL1 alarm surveillance on DV-45 equipment disables E2A-TBOS alarm surveillance, and vice versa.

The alarm information collected from each DV-45 circuit pack by the NT2H35KA MCU becomes alarm points in an E2A display, and TL1 messages in the DV-45 TL1 alarm interface. They represent the same alarms as those routed to the LED faceplate indicators on the DV-45 circuit packs.

5-2

TL1 alarm surveillance interface



Alarms for a remote coder are transmitted by way of the X-bits of the DS3 stream. If the coder is part of a bidirectional video link, the alarms from the decoder unit are added. Remote alarms can be disabled on the NT2H35KA MCU. Remote alarms do not effect the DV-45 TL1 alarm interface.

The NT2H35KA MCU is compatible with all DV-45 circuit packs.

TL1 implementation on DV-45 equipment

The NT2H35KA MCU supports the following TL1 network surveillance and provisioning applications for DV-45 NEs:

• single RS-232 console interface

• alarm reports (REPT ALM messages)

• event reports (REPT EVT messages)

• current alarm summary (RTRV-ALM)

• current condition summary (RTRV-COND)

• header retrieval (RTRV-HDR)

• equipment retrieval (RTRV-EQPT)

• attribute retrieval (RTRV-rr)

• attribute deletion (DLT-rr)

• attribute editing (ED-rr)

• attribute entry (ENT-rr)

• circuit pack initialization (INT-SYS)

Note:

In provisioning commands, such as RTRV-rr, DLT-rr, ED-rr and ENT-rr, <rr> is an object entity.

The NT2H35KA MCU supports the following DV-45 circuit packs:

• DV-45B coders and decoders

• DCS units

• MCUs

• OC3 line interface units

• DV-45B BTSC coders and decoders

• Music-E45 multiplexers and demultiplexers

• Games-S45 multiplexers and demultiplexers

• Stereo-FM45 multiplexers and demultiplexers

• DV-MPEG coders and decoders

• DV-323 Mux-IMux units


5-3



When the DV-45 shelves are equipped with the NT2H35KA MCUs, the TL1 implementation on DV-45 equipment allows a TL1 OS to monitor remotely and provision the DV-45 NEs (DV-MPEG and DV-323 Mux-IMux). The TL1 OS equipment accesses the DV-45 TL1 interfaces by running a Transmission Control Protocol/ Internet Protocol (TCP/IP) telnet session over Ethernet. Monitoring capacity depends on the TL1 OS equipment engineering.

In the example shown in Figure 5-1, each DV-45 shelf equipped with the NT2H35KA MCU is connected to a terminal server using a separate point-to-point RS-232 connection. The terminal server maps each RS-232 connection to a separate TCP/IP connection. The DV-45 TCP/IP connections are then transported over the Ethernet LAN/WAN to the TL1 alarm display terminals for monitoring by the resident TL1 alarm display software application.

Alternatively, a VT-100 terminal can be directly connected through a null modem to a DV-45 shelf equipped with the NT2H35KA MCU for local monitoring and provisioning of that shelf’s TL1 messages (Figure 5-2). This is the most basic TL1 OS setup for monitoring and provisioning of DV-45 NEs.

The engineering, provisioning, and installation of the TL1 OS equipment is the customer’s responsibility. It can be performed by the original equipment manufacturer (OEM) as arranged by customers, or by customers themselves.

Note:

TL1 Managed Object Agent (MOA) is an optional TL1 alarm display software application from Northern Telecom that enables network operators to remotely monitor TL1 alarms on up to 50 DV-45 shelves using OEM TL1 OS equipment. When required, additional TL1 MOAs can be installed within the network for more monitoring capacity. It allows S/DMS Network Manager and Information Networking Architecture (INA) software to interface with any DV-45 NE supporting a Bellcore compliant operations, administration, maintenance, and provisioning (OAM&P) TL1 interface. For more information, see

TL1 MOA User Guide

, 323-4041-050, PEC NTRT66AG.

Standards compliance

The DV-45 TL1 alarm surveillance interface complies with the following standards:

•

Operations Technology Generic Requirements

, TR-NWT 0000811, TL1 Message Index

•

Operations Technology

, TR-NWT 000831, TL1 Language Specification

Note:

Proprietary extensions needed to support the DV-45 product functions are included with these standards.

5-4




Figure 5-1Example configuration for remotely monitoring DV-45 TL1 alarms

Figure 5-2Example configuration for locally monitoring DV-45 TL1 alarms

TL1 alarm display terminals

EthernetLAN

WAN

Router

Router

Terminalserver

Ethernet

RS-232

DV-45 shelvesequipped withNT2H35KA MCUs

VT100 terminal DV-45 shelfequipped withNT2H35KA MCU

Null modem


5-5



TL1 connectivity

Every DV-45 shelf equipped with the NT2H35KA MCU has its own DV-45 TL1 alarm surveillance interface, and is considered to be a TL1-manageable entity within the network.

Access to the DV-45 TL1 alarm surveillance interface is provided through RS-232 DB25 ports located on the DV-45 shelf backplane. The RS-232 ports support the asynchronous transfer of ASCII characters. By default they are configured for 8 data bits, no parity, and 1 stop bit (8N1) at 19,200 baud. Serial RS-232C or RS-232D links are supported for both local and remote communications with either a computer or standard ASCII terminal.

Local access is provided by directly connecting the RS-232 DB25 port on the DV-45 shelf backplane to a VT-100 terminal through a null modem. This is done using straight-through RS-232 cable equipped with DB25 connectors at each end. If the port on the VT-100 terminal is a DB9, then a DB9 to DB25 adapter is also required for the VT-100 terminal end.

Note:

Character echo is disabled to support a machine-to-machine interface. To use the DV-45 TL1 interface locally, it is recommended that the user enable the Local Echo option on the connected terminal equipment.

Remote IP access is provided by connecting the RS-232 DB25 port on the DV-45 shelf backplane to the TL1 OS data communications interface, according to network requirements. This is done using straight-through RS-232 cable equipped with the required connectors and adapters at each end. A separate point-to-point RS-232 link is required for each DV-45 shelf.

Note:

Ensure that all engineering, provisioning, and installation requirements are met for the TL1 OS equipment before connecting it to DV-45 TL1 interfaces. This is a customer responsibility that can be performed by the original equipment manufacturer (OEM) as arranged by customers, or by customers themselves.

5-6




TL1 data flow

See Figure 5-3 for a diagram of the DV-45 TL1 alarm and provisioning data flow between a DV-45 shelf equipped with the NT2H35KA MCU and the TL1 OS. The DV-45 TL1 alarm and provisioning data flow through each of the main sections shown in Figure 5-3 is described in the following text.

Generate TL1 notifications

This section of the TL1 OS generates TL1 notifications when it receives notifications of database changes. It does this by

1 receiving MCU database change notifications from the Update MCU database section

2 generating either a TL1 alarm or event report

3 placing each report on the TL1 transmit queue

Handle TL1 messages

This section of the TL1 OS performs semantic validation and processing of TL1 messages. It does this by

1 accepting syntactically validated TL1 messages

2 performing semantic validation of each TL1 message

3 generating an error response if semantic validation fails

4 processing the command if semantic validation passes by

— retrieving status information from the MCU database if the message is requesting data retrieval, or

— passing the message on to the Update MCU database section if the command contains control or provisioning information

5 generating an appropriate normal response

6 placing the response on the TL1 transmit queue


5-7



Receive TL1 messages

This section of the TL1 OS performs syntactic validation of TL1 messages received from the RS-232 DB25 port on the DV-45 shelf backplane. It does this by

1 accepting raw ASCII input from the RS-232 port

2 parsing the input to extract TL1 commands

3 performing syntactic validation of the TL1 messages, checking that

— the TL1 message uses the correct grammar

— the commands and modifiers are supported

— all parameters provided are supported

— all parameter values are in range

4 generating an error response if syntactic validation fails

5 placing any error response on the TL1 transmit queue

6 passing validated TL1 messages to the Handle TL1 messages section

Transmit TL1 messages

This section of the TL1 OS transmits TL1 messages in the same order as they are placed on the TL1 transmit queue.

Update MCU database

This section of the TL1 OS updates the MCU database, based on either status information received from monitored units, or control and provisioning information received from the Handle TL1 commands section. It then reports MCU database changes to the Generate TL1 notifications section.

5-8




Figure 5-3DV-45 TL1 alarm data flow

FW-3105

The TL1 OS interfaces with the MCU database to: - read status information including alarms and shelf configuration - write provisioning and control settings - retrieve current provisioning and control settings

The TL1 OS interfaces with the RSS-232 Port to: - receive TL1 messages - generate TL1 messages - generate autonomous TL1 notifications

MCUdatabase

Controls andprovisioning

TL1 messagesand notifications TL1 messagesStatus

TL1 operationssystem (OS)

TL1 RS-232DB-25 port

TL1 RS-232DB-25 port

DV-45 shelfbackplane

DV-45 shelfbackplane

TransmitTL1

messages

TL1 Txqueue

ReceiveTL1

commands

Raw TL1input

Syntacticallyvalidated TL1commands

Currentstatusprovisioningand controls

Errorresponses

GenerateTL1

notifications

UpdateMCU

database

MCUdatabase

HandleTL1

messages

Alarm reportsEvent reports

MCUdatabasechanges

Monitoredunit status

Provisioningand controls

Databaseupdates

Legend

TL1 operations system function

DV-45 TL1 interface

FW-3105


5-9



TL1 message overview

This section describes the types of DV-45 TL1 messages and common elements present in all DV-45 TL1 messages.

TL1 message types

TL1 alarm surveillance messages for the DV-45 system can be grouped into autonomous and non-autonomous types.

Autonomous messages are generated by the DV-45 NEs to report the occurrence or clearing of alarms, and are reported to the TL1 OS automatically. No request is required from the TL1 OS to receive autonomous messages. As a result, autonomous messages have an unidirectional data flow from the DV-45 NEs to the TL1 OS.

Non-autonomous messages consist of a request message from the TL1 OS and a response message from the DV-45 NE, and therefore have a bidirectional flow between the TL1 OS and the DV-45 NEs. For example, the TL1 OS message can be a user request for any outstanding minor alarms for a specified DV-45 NE, and the DV-45 NE sends the appropriate response message.

TL1 response header

The first two lines of all TL1 message responses have a common format.

The first line always contains the System IDentifier (SID), and the date and time the TL1 response was sent to the OS. An example of the first line is

The second line of the TL1 message is different for autonomous and non-autonomous messages. For autonomous messages, the second line in alarm messages begins with an alarm code, such as an asterisk (which represents a minor alarm). The second line in non-alarm messages begins with an A. The second line of autonomous messages also contains

• a numerical message tag which is automatically generated

• the TL1 message type

For non-autonomous messages, the second line always begins with an M, followed by the correlation tag (CTAG) used in the original TL1 request. The CTAG is in turn followed by either the word COMPLD to indicate a normal response, or DENY to indicate an error response.

Three examples of TL1 headers are shown in Figure 5-4.

SID Date and time of message

DV45 70-01-01 00:00:00

5-10




Figure 5-4DV-45 TL1 message header examples

rtrv-hdr:DV45::RQ0003;

DV45 70-01-01 00:00:00M RQ0003 COMPLD

M tagMessage tag (CTAG)

TL1 request

TL1 response(non-autonomous)

DV45 70-01-01 00:00:00** 49173 REPT ALM NTSC

Alarm code (major alarm)Message tag (ATAG)

Autonomous message type

TL1 response

(autonomous)header

DV45 70-01-01 00:00:00A 49181 REPT EVT NTSC

A tag (non-alarm)Message tag (ATAG)

Autonomous message type

TL1 response

(autonomous)header

(report alarm, NTSC video)

( report event, NTSC video)

COMPLD (normal)DENY (error)

Non-autonomous message example

Autonomous message example

Alarm type autonomous message response header

Non-alarm type autonomous message response header


5-11



Autonomous TL1 messages

The autonomous message types listed in Table 5-1 are supported by the NT2H35KA MCU, and are described in this section. See “Message parameters” on page 5-24 for descriptions of all the autonomous message parameters.

See “Summary of supported DV-45 TL1 AID parameters and surveillance alarms” on page 5-34 for a list summarizing the AID parameters and TL1 surveillance alarms supported by the NT2H35KA MCU for the DV-45 circuit packs.

See

Alarm and Trouble Clearing Procedures

, 323-1401-543, for procedures to clear DV-45 TL1 surveillance alarms.

TL1 message notation

The following notation is used to define the syntax of the TL1 messages:

Table 5-1Autonomous DV-45 TL1 message types

Message type Purpose

REPT ALM(report alarm)

Reports non-environmental alarms with severities of major, minor, and clear.

REPT EVT(report event)

Reports event logs, that is, conditions other than alarms.

Symbol Meaning

cr

ASCII carriage return

lf

ASCII line feed

^

ASCII space

[ ]

optional expression

< >

variable expression

5-12




REPT ALM (report alarm)Purpose

The REPT ALM message is an autonomous message generated by the DV-45 NE to report non-environmental alarms with severities of major, minor, and clear. Each alarm is reported in a separate REPT ALM message.

Output format

The syntax of the REPT ALM message is

cr lflf^^^<sid>^<date>^<time>cr lf<almcde>^<atag>^REPT^ALM^<sccm> cr lf^^^“<aid>:<ntfcncde>,<condtype>,<srveff>,,,,<dirn>:<condescr>”cr lf;

Parameter description

See “Message parameters” on page 5-24 for descriptions of all the autonomous message parameters.

Note:

Unless specified otherwise, all TL1 parameters are case insensitive.

Examples

Report alarm message telling that NTSC vertical synchronization loss is detected on slot 1, NTSC Port 0:

DV45 70-01-01 00:00:00** 37180 REPT ALM NTSC “NTSC-1-0:MJ,VSYNC,SA,,,,TRMT:\“NTSC Vertical Sync Loss\””;

Report alarm message telling that the NTSC vertical synchronization loss alarm reported for slot 1, NTSC Port 0, has been cleared:

DV45 70-01-01 00:00:00A 37181 REPT ALM NTSC “NTSC-1-0:CL,VSYNC,SA,,,,TRMT:\“NTSC Vertical Sync Loss\””;


5-13



REPT EVT (report event)Purpose

The REPT EVT message is an autonomous message generated by the DV-45 NE to report event logs, that is, conditions other than alarms. Each event is reported in a separate REPT EVT message.

Output format

The syntax of the REPT EVT log message is

cr lflf^^^<sid>^<date>^<time> cr lfA^^<atag>^REPT^EVT^<sccm> cr lf[cr lf^^^“<aid>:<condtype>,<condeff>,,,,<dirn>:<condescr>”]...cr lf;

Parameter description

See “Message parameters” on page 5-24 for descriptions of all the autonomous message parameters.

Note:

Unless specified otherwise, all TL1 parameters are case insensitive.

Examples

Report event message telling that an NTSC Black reference level signal is detected on slot 1, NTSC Port 0:

DV45 70-01-01 00:00:00A 37182 REPT EVT NTSC “NTSC-1-0:BLACK,SC,,,,TRMT:\“NTSC BLACK ACTIVE\””;

Report event message telling that the NTSC Black reference level signal condition reported for slot 1, NTSC Port 0, has been cleared:

DV45 70-01-01 00:00:00A 37813 REPT EVT NTSC “NTSC-1-0:CL,VSYNC,CL,,,,TRMT:\“NTSC BLACK ACTIVE\””;

5-14




Non-autonomous TL1 messages

The non-autonomous message types listed in Table 5-2 are supported by the NT2H35KA MCU, and are described in this section. See “Message parameters” on page 5-24 for descriptions of all the non-autonomous message parameters. See “Error codes” on page 5-32 for descriptions of all the error code parameters.

See “Summary of supported DV-45 TL1 AID parameters and surveillance alarms” on page 5-34 for a listing summarizing the AID parameters and TL1 surveillance alarms supported by the NT2H35KA MCU for the DV-45 circuit packs.

See


, 323-1401-543 for procedures to clear DV-45 TL1 surveillance alarms.

Table 5-2 Non-autonomous DV-45 TL1 message types

Message type Purpose

RTRV-ALM(retrieve alarm)

Used to instruct a DV-45 shelf to retrieve its active alarms which are normally reported automatically by the autonomous Report Alarm message. The response message provides information similar to the Report Alarm message.

RTRV-COND(retrieve condition)

Used to instruct a DV-45 shelf to retrieve its current active conditions or states (including alarms and other conditions) which are normally reported automatically by the autonomous Report Event and Report Alarm messages. Environmental alarms are not retrieved.

RTRV-HDR(retrieve header)

Used to instruct a DV-45 shelf to verify its target identifier (TID). This message is used primarily to check that the DV-45 shelf is active on the network and responding to the TL1 OS on a periodic basis. It is useful when troubleshooting NE link failures or loss of communications to the NE or TL1 OS.

RTRV-EQPT(retrieve equipment)

Used to instruct a DV-45 MCU to verify its system attributes. This message is used to check the PEC code of an MCU to ensure that the correct firmware is installed.

DLT-rr(delete attributes)

Used to instruct a DV- 323 Mux-IMux module to delete the system attributes of an object entity (rr).

ED-rr(edit attributes)

Used to instruct a DV-MPEG card and a DV-323 Mux-IMux to edit the service parameters (attributes) and appropriate state parameters of an object entity (rr).

ENT-rr(enter attributes)

Used to instruct a DV-MPEG card and a DV-323 Mux-IMux to enter the system attributes of an object entity (rr).

RTRV-rr(retrieve attributes)

Used to instruct a DV-MPEG card and a DV-323 Mux-IMux to retrieve the service parameters (attributes) of an object entity (rr).

INIT-SYS (circuit pack initialization)

Used to reboot and initialize any DV-45 series circuit pack.


5-15



TL1 message notation

The following notation is used to define the syntax of the TL1 messages:

Symbol Meaning

cr ASCII carriage return

lf ASCII line feed

^ ASCII space

[ ] optional expression

< > variable expression

5-16 TL1 alarm surveillance interface



RTRV-ALM (retrieve alarm)PurposeThe RTRV-ALM message is a non-autonomous message consisting of

• a request message from the TL1 OS instructing a specified DV-45 shelf to retrieve its active alarms

• a normal or error response message from the specified DV-45 shelf

The response message provides information similar to the autonomous REPT ALM message. All alarms autonomously reported by the REPT ALM message may also be retrieved using the RTRV-ALM message.

Request formatThe syntax of the RTRV-ALM request message isrtrv-alm-<sccm>:[<tid>]:<aid>:<ctag>;

Note: The SCCM and AID values are restricted to <all>.

Normal response formatThe syntax of the RTRV-ALM normal response message iscr lflf^^^<sid>^<date>^<time> cr lfM^^<ctag>^COMPLD [cr lf^^^“<aid>,<aidtype>:<ntfcncde>,<condtype>,<srveff>,,,,<dirn>:<condescr>”]... cr lf;

Error response formatThe syntax of the RTRV-ALM error response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^DENY cr lf^^^<errcde> cr lf^^^/*<error text>*/ cr lf;

Parameter descriptionSee “Message parameters” on page 5-24 and “Error codes” on page 5-32 for descriptions of all the non-autonomous message parameters.

Note 1: Unless specified otherwise, all TL1 parameters are case insensitive.

Note 2: The SCCM and AID values are restricted to <all> for the RTRV-ALM message.

TL1 alarm surveillance interface 5-17



ExamplesRTRV-ALM request message telling a DV-45 shelf to retrieve all alarms:rtrv-alm-all:DV45:all:rq0001;

RTRV-ALM normal response message telling that no alarms are active on the specified DV-45 shelf: DV45 70-01-01 00:00:00M RQ0001 COMPLD;

RTRV-ALM normal response message telling that a DS3 alarm inhibit signal (AIS) is detected on slot 2, DS3 Port 1, and that NTSC vertical synchronization loss is detected on slot 1, NTSC Port 0: DV45 70-01-01 00:00:00M RQ0001 COMPLD “NTSC-1-0,NTSC:MJ,VSYNC,SA,,,,TRMT:\”NTSC Vert Sync Loss\””;

RTRV-ALM error response message telling that an incorrect AID value was specified by the RTRV-ALM request message (SCCM and AID values are restricted to <all> for the RTRV-ALM message): DV45 70-01-01 00:00:00M RQ0001 DENY IDNV /* Input, Data, Not Valid AID */;




RTRV-COND (retrieve condition)PurposeThe RTRV-COND message is a non-autonomous message consisting of

• a request message from the TL1 OS instructing a specified DV-45 shelf to retrieve its current active conditions or states (including alarms and other conditions)

• a normal or an error response message from the specified DV-45 shelf

All alarms autonomously reported by the REPT EVT and REPT ALM messages may also be retrieved using the RTRV-COND message. Environmental alarms are not retrieved.

Request formatThe syntax of the RTRV-COND request message isRTRV-COND-<sccm>:[<tid>]:<aid>:<ctag>;

Note: The SCCM and AID values are restricted to <all>.

Normal response formatThe syntax of the RTRV-COND normal response message iscr lflf^^^<sid>^<date>^<time> cr lfM^^<ctag>^COMPLD [cr lf^^^“<aid>,<aidtype>:<ntfcncde>,<typerep>,<srveff>,,,,<dirn>:<condescr>”]... cr lf;

Error response formatThe syntax of the RTRV-COND error response message iscr lflf^^^<sid>^<date>^<time> cr lfM^^<ctag>^DENY cr lf^^^<errcde> cr lf^^^/*<error text>*/ cr lf;



Note 2: The SCCM and AID values are restricted to <all> for the RTRV-COND message.




ExamplesRTRV-COND request message telling a DV-45 shelf to retrieve all current active conditions or states (including alarms and other conditions):rtrv-cond-all:DV45:all:rq0002;

RTRV-COND normal response message telling that no alarms are active on the specified DV-45 shelf: DV45 70-01-01 00:00:00M RQ0002 COMPLD;

RTRV-COND normal response message telling that a DS3 AIS is detected on slot 2, DS3 Port 1, and that an NTSC Black reference level signal is detected on slot 1, NTSC Port 0 (no alarm, not service affecting): DV45 00-01-01 00:00:00M RQ0002 COMPLD “T3-2-1,T3:NA,AIS,SA,,,,RCV:\“DS3 AIS\”” “NTSC-1-0,NTSC:NA,BLACK,NSA,,,TRMT:\”NTSC Black Active\””;

RTRV-COND error response message telling that an incorrect AID value was specified by the RTRV-COND request message (SCCM and AID values are restricted to <all> for the RTRV-COND message): DV45 00-01-01 00:00:00M RQ0002 DENY IDNV /* Input, Data, Not Valid AID */;




RTRV-HDR (retrieve header)PurposeThe RTRV-HDR message is a non-autonomous message consisting of

• a request message from the TL1 OS instructing a specified DV-45 shelf to verify its TID

• a normal or error response message from the specified DV-45 shelf

This message is used primarily to check that the DV-45 shelf is active on the network and responding to the TL1 OS on a periodic basis. It is useful for troubleshooting RS-232 link failures or a loss of communciations to the DV-45 circuit packs or TL1 OS.

Request formatThe syntax of the RTRV-HDR request message isrtrv-hdr:[<tid>]::<ctag>;

Normal response formatThe syntax of the RTRV-HDR normal response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^COMPLD cr lf;

Error response formatThe syntax of the RTRV-HDR error response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^DENY cr lf^^^<errcde> cr lf^^^/*<error text>*/ cr lf;


Note: Unless specified otherwise, all TL1 parameters are case insensitive.




ExamplesRTRV-HDR request message telling a DV-45 shelf to retrieve its TID:rtrv-hdr:DV45::RQ0003;

RTRV-HDR normal response message telling that the RTRV-HDR request was successful: DV45 70-01-01 00:00:00M RQ0003 COMPLD;

RTRV-HDR error response message telling that the RTRV-HDR request was unsuccessful: DV45 70-01-01 00:00:00M RQ0003 DENY INUP /* Input, Non-Null Unimplemented Parameter AID*/;




RTRV-EQPT (retrieve equipment)PurposeThe RTRV-EQPT message is a non-autonomous message consisting of

• a request message from the TL1 OS instructing a specified DV-45 MCU to verify its system attributes

• a normal or an error response message from the specified DV-45 MCU

This message is used to check the PEC code of an MCU to ensure that the correct firmware is installed.

Request formatThe syntax of the RTRV-EQPT request message isrtrv-eqpt:[<tid>]:<aid>:ctag;

Note: The AID value is restricted to <MCU>.

Normal response formatThe syntax of the RTRV-EQPT normal response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^COMPLD cr lf^^^”<aid>::<specific block>:<state block>”... cr lf;

Error response formatThe syntax of the RTRV-EQPT error response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^DENY cr lf^^^<errcde> cr lf^^^/*<error text>*/ cr lf;



Note 2: The AID value is restricted to <MCU> for the RTRV-EQPT message.




ExamplesRTRV-EQPT request message telling a DV-45 MCU to retrieve its system attributes:rtrv-eqpt:DV45:MCU:RQ0004;

RTRV-EQPT normal response message telling that the RTRV-EQPT request was successful: DV45 70-01-01 00:00:00M RQ0004 COMPLD “MCU::VEND=\”Northern Telecom\”,EVER=\”NT2H35KA\”:IS-NR”;

RTRV-EQPT error response message telling that the RTRV-EQPT request was unsuccessful: DV45 70-01-01 00:00:00M RQ0004 DENY IDVN /* Input, Data, Not Valid AID*/;




DLT-rr (delete attributes)PurposeThe DLT-rr message is a non-autonomous message consisting of

• a request message from the TL1 OS instructing a specified DV-323 Mux-IMux module to delete the system attributes of an object entity.

• a normal or an error response message from the specified DV-323 Mux-IMux module deleting it before.

Note: The DLT attribute is only used by the DV-323 Mux. The IMux attributes can be overwritten without the use of the Delete command.

Request formatThe syntax of the DLT-rr request message isDLT-rr:[<tid>]:<aid>:<ctag>:::<specific block>;

The rr value is restricted to <T3> to indicate DS3 termination.

The AID value is restricted to T3-<slot id>-<ds3_id> (rr=T3), where <slot_id> is an integer from zero through seven and the <ds3_id> is an integer from one through three Mux = always 1, IMux = 1 to 3).

The <specific block> value is name defined and restricted as follows:

• POS=T2-<ds2_id>, where <ds2_id> is an integer from one through seven indicating the position of the first DS2 subchannel to be deleted

• LEN =<ds2_num>, where <ds2_num> is the number of DS2 subchannels to be deleted on the outgoing DS3 channel

Normal response formatThe syntax of the DLT-rr normal response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^COMPLD cr lf;

Error response formatThe syntax of the DLT-rr error response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^DENY cr lf^^^<errcde> cr lf^^^/*<error text>*/ cr lf;






ExamplesDLT-rr request message telling the DV-MPEG Mux module in slot 0 to delete three DS2 subchannels from the outgoing DS3 channel, starting from DS2 number three:DLT-T3:DV45:T3-0-1:RQ0001:::POS=T2-3,LEN=3;

Note: A Mux has only 1 DS3 output, therefore the outgoing channel number is always one.

DLT-rr normal response message telling that the DLT-rr request was successful: DV45 70-01-01 00:00:00M RQ0004 COMPLD;

DLT-rr error response message telling that the DLT-rr request was unsuccessful: DV45 70-01-01 00:00:00M RQ0004 DENY IDVN /* Input, Data, Not Valid TID*/;




RTRV-rr (retrieve attributes)PurposeThe RTRV-rr message is a non-autonomous message consisting of

• a request message from the TL1 OS instructing a specified DV-MPEG or DV-323 card to retrieve the system attributes of an object entity

• a normal or an error response message from the specified DV-MPEG or DV-323 card

Request formatThe syntax of the RTRV-rr request message isRTRV-rr:[<tid>]:<aid>:<ctag>;

The rr value is restricted to <T3> to indicate DS3 termination, <video> to indicate video termination, <audio> to indicate audio termination, and <mpeg> to indicate MPEG termination.

The AID value is restricted to:

• T3-<slot id>-<ds3_id>:rr=T3

• Video-<slot_id>-1:rr=video

• Audio-<slot_id>-<channel_id>:rr=audio

• MPEG-<slot_id>-1:rr=mpeg

where the <slot_id> is an integer from zero through seven, the <ds3_id> is an integer from one through three, and the <channel_id> is an integer from one to two.

Normal response formatThe syntax of the RTRV-rr normal response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^COMPLD cr lf[^^^”<aid>::<specific block>:<state block>”<cr><lf>;

The <specific block> value is name defined and restricted as follows:

• if <aid> is equal to Video/Audio/MPEG the specific block is as described in “ED-rr (edit attributes)”

• if <aid> is equal to T3 and card type is equal to DV-MPEG encoder, decoder, or DV-323 Mux-IMux, the specific block is as described in “ED-rr (edit attributes)” and “ENT-rr (enter attributes)”

• if <aid> is equal to T3 and card type is equal to DV-323 IMux, the specific block is <FROM>,<TO>:<LBO>, where <FROM> and <TO> are values restricted to T2-1 through T2-7




The <state block> value indicates the status of the equipment. Its value is restricted to IS-NR (In Service, Normal), and OOS-NR (Out Of Service, Normal).

Error response formatThe syntax of the RTRV-rr error response message iscr lf lf^^^<sid>^<date>^<time> cr lfM^^<ctag>^DENY cr lf^^^<errcde> cr lf^^^/*<error text>*/ cr lf;



ExamplesRTRV-rr request message requesting the DV-MPEG card in slot 0 to retrieve its terminal mode, the first DS2 subchannel to use, the number of DS2 subchannels to use, and the primary state of the DS3:RTRV-T3:DV45:T3-0-1:RQ0001;

RTRV-rr request message requesting the DV-MPEG card in slot 0 to retrieve its MPEG mode, video/audio/PCR PID, total bit rate, and type of MPEG-2 encoding:RTRV-MPEG:DV45:MPEG-0-1:RQ0001;

RTRV-rr normal response message telling that the RTRV-rr request was successful: DV45 70-01-01 00:00:00M RQ0004 COMPLD;

RTRV-rr error response message telling that the RTRV-rr request was unsuccessful: DV45 70-01-01 00:00:00M RQ0004 DENY IDVN /*Input, Data, Not Valid TID*/;




Message parametersThis section describes the DV-45 TL1 surveillance message parameters listed in Table 5-3.

Table 5-3TL1 surveillance message parameters

Parameter Description

AID Identification of the equipment/facility

AIDTYPE Type of access identifier

ALMCDE Identification of the alarm severity

ATAG Automatic transaction identifier

CONDEFF Indication of the condition

CONDESCR Condition text description

CONDTYPE Type of event

CTAG Correlation identifier

DATE Always 70 - 01-01

DIRN Direction of the event

NTFCNCDE Alarm code

SCCM Second command code modifier

SID NE identifier which originated the message

SPECIFIC BLOCK Identification of the equipment/facility system attributes

SRVEFF Service effect

STATE BLOCK Indication of the equipment/facility status

TID Target NE identifier

TIME Always 00 : 00 : 00

TYPEREQ Types of condition to be retrieved (equivalent to CONDTYPE)




AIDThe access identifier (AID) parameter is used in conjunction with secondary command code modifier (SCCM) or AIDTYPE parameters to identify a specific managed entity within the NE, such as a facility or circuit pack. The TL1 standard does not impose a specific syntax on access identifiers, but does make the following recommendations.

Note: Equipment or facility access identifiers do not have to include the type of entity being accessed, since messages with access identifiers also include either an SCCM or AIDTYPE parameter.

Equipment access identifiers may be

• physical, based on the location of the equipment (for example, <frame_id>-<shelf_id>-<slot_id>)

• functional, based on the role of the equipment (for example, PWRA to identify Power Unit A)

• an office equipment (OE) number

• a CLEI code

Note: It is also possible to combine the functional identifiers with the physical identifiers (for example, PWRA-5-2 to identify Power Unit A in Shelf 5, Slot 2).

Facility access identifiers may be

• physical, based on location (for example, <frame_id>-<shelf_id>-<slot_id>-<port_id>)

• hierarchical, based on multiplexing (for example, 4-3, to identify the third DS1 slot within the fourth DS3 channel)

• based on some other system

FormatThe AID parameter format for DV-45 equipment isCPK-<slot_id>

The AID parameter format for DV-45 facilities is

<SCCM>-<slot_id>-<port_id>

See Table 5-4 “Summary of supported DV-45 TL1 AID parameters and surveillance alarms” on page 5-34 for a list summarizing the AID parameters supported by the NT2H35KA MCU for the DV-45 circuit packs.




AIDTYPEThe AIDTYPE parameter indicates the type of access identifier. It is only used in the retrieve alarm and retrieve condition normal response message. AIDTYPE assumes the same value as the SCCM parameter in the corresponding autonomous report alarm message, with the exception of the value All. All is a short form to indicate all applicable SCCM values. It is meaningful only in retrieve alarm and retrieve condition request messages.

ALMCDEThe ALMCDE parameter is the alarm severity code for the TL1 alarm message. The ALMCDE parameter takes the value A^ only when the value of the NTFCNCDE is CL (cleared).

Note: The DV-45 TL1 surveillance interface does not support the reporting of critical alarms.

Note: The symbol ^ indicates space.

ATAGThe ATAG parameter is an integer number of up to 10 digits, max = 232. The maximum is not used in the TL1 autonomous messages to uniquely identify each of the TL1 messages which are generated.

The ATAG parameter is an automatic message counter which is incremented by one for each autonomous message, and it wraps around 1. Its value is autonomously generated by the TL1 software in the NT2H35KA MCU. The ATAG value of the first TL1 autonomous message is one (1).

The ATAG parameter is intended only as a sequence number and is used only in the autonomous messages. It is used by the TL1 OS to detect if any messages have been lost.

ALMCDE parameters

Description

** Major alarm

*^ Minor alarm

A^ Automatic message (cleared)




CONDEFFThe CONDEFF parameter indicates the effect of a non-alarm event on the condition of the NE.

Note: The DV-45 TL1 surveillance interface does not support the reporting of transient conditions. An exception is the reporting of DV-45 MCU reboots through CONDTYPE parameter SYSBOOT.

CONDDESCRThe CONDDESCR parameter is the detailed text description of an alarm or other condition for the TL1 message. It is up to 64 ASCII characters in length and is enclosed within escaped quotes (\”).

CONDTYPEThe CONDTYPE parameter identifies the type of condition event.

CONDEFF parameters

Description

CL Clear standing condition

SC Standing condition

TC Transient condition

CONDTYPE parameters

Description

AIS Alarm indication signal detected

BLACK (Note) NTSC Black reference level signal detected

CONTCOM Control communications equipment failure

FERF Far end receive failure

INC Incoming failure

INT Internal hardware failure

LOF Loss of frame

LOP Loss of pointer

LOS Loss of signal

LPBKLINE Line loopback active

MISM (Note) Mismatch

PROVERR (Note) Bad channel selected

SYSBOOT (Note) MCU reboot

T-BERL Line degrade

T-BERP Path degrade

T-BERS Section degrade

T-LPR Low optical power

—continued—




CTAGThe CTAG parameter is a correlation identifier generated by the TL1 OS. It is used to correlate non-autonomous request and response messages. It is up to six ASCII characters in length and can be a mix of numeric or alphabetic characters.

Each non-autonomous request message contains a CTAG with a value assigned by the TL1 OS. Each response message to the request contains the same CTAG value. The TL1 OS keeps track of correlation identifiers to detect if any non-autonomous requests are outstanding.

DATEThe DATE parameter is the date of origination of the TL1 message. The format for dates under the TL1 standard is yy-mm-dd.

Note: The DV-45 TL1 interface does not support datestamping, so all mandatory date fields are reported as 70-01-01.

DIRNThe DIRN parameter is the direction of the event.

UNEQ (Note) Unequipped

VSYNC (Note) NTSC vertical synchronization loss

YEL Yellow signal received

Note: This parameter is a proprietary extension to the TL1 standard.

—end—

Date parameters

Description

yy Last two digits of the year (00 to 99)

mm Month (01 to 12)

dd Day of the month (01 to 31)

DIRN parameters

Description

TRMT Transmit

RCV Receive

NA Not applicable

CONDTYPE parameters

Description




NTFCNCDEThe NTFCNCDE parameter is the notification code for the TL1 message. It indicates the effect of the associated event on the condition of the NE.

Note 1: The DV-45 TL1 interface does not support the reporting of critical alarms.

Note 2: The CL value is not used in retrieve alarm or retrieve condition messages.

SCCMThe secondary command code modifier (SCCM) parameter specifies the administrative view of a given TL1 message, that is, the class of entities on which a given TL1 message is to operate.

Note: The value ALL is a short form to indicate all applicable SCCM parameters.

NTFCNCDE parameters

Description

MJ Major alarm

MN Minor alarm

NA Non affecting

CL Cleared alarm

SCCM parameters

Description

ALL All facilities

EQPT Equipment

OC3 OC-3 facility

STS1 STS-1 facility at a DS3 STS mapper

T3 DS3 facility

T2 DS2 facility

DCOM (Note) Data communications facility

NTSC (Note) NTSC video signal

BTSC (Note) BTSC audio signal

GAME (Note) Games signal

MUSIC (Note) Digital music signal

FM (Note) Composite baseband FM signal

MPEG MPEG2 signal

Video Video signal

Audio Audio signal

Note: This parameter is a proprietary extension to the TL1 standard.




SIDThe system identifier (SID) parameter identifies the NE that originated the TL1 message. It is included in each non-autonomous response message and autonomous message generated by the NE.

The SID parameter format is identical to the target identifier (TID) parameter format, and is either

• a name specifically programmed for use as the SID. This name is up to 20 characters in length and is valid if it meets the TL1 requirement of containing only letters, digits, hyphens (-), underscores (_), and periods (.)

• the NE name (NEname), which is valid if it meets the TL1 requirement and is up to 13 characters in length

• the NE identity (NEid) if the NEname is not valid (if it contains spaces, for example)

FormatUp to 13 (NE name) or 20 (defined) ASCII characters limited to letters, digits, and hyphens (-), underscores (_), and periods (.). Up to four digits if the NE id is used.

Note: The SID parameter is set to DV45 for the DV-45 TL1 surveillance interface.

SPECIFIC BLOCKThe SPECIFIC BLOCK parameter identifies the system attributes of the MCU. The format for the SPECIFIC BLOCK parameter is

VEND=\”Vendor identification string\”, EVER=\”MCU version (PEC code)\”

SRVEFFThe SRVEFF parameter indicates the effect on service. The possible values are

• service-affecting (SA)

• non service-affecting (NSA)

STATE BLOCKThe STATE BLOCK parameter indicates the status of the MCU. It is set to IS-NR for the DV-45 TL1 surveillance interface.




TIDThe target identifier (TID) parameter identifies the target of a TL1 OS non-autonomous request message and is equivalent to the SID parameter. It is included in each non-autonomous request message generated by the TL1 OS.

The format of the TID parameter is identical to the SID parameter, and is either:

• a name specifically programmed for use as the TID. This name is up to 20 characters in length and is valid if it meets the TL1 requirement of containing only letters, digits, hyphens (-), underscores (_), and periods (.)

• the NE name (NEname), which is valid if it meets the TL1 requirement and is up to 13 characters in length

• the NE identity (NEid) if the NEname is not valid (if it contains spaces, for example)

FormatUp to 13 (NE name) or 20 (defined) ASCII characters limited to letters, digits, and hyphens (-), underscores (_), and periods (.). Up to four digits if the NE id is used.

Note: The TID parameter is set to DV45 for the DV-45 TL1 interface.

TIMEThe TIME parameter is the translation time of the TL1 message. The format for time under the TL1 standard is hh:mm:ss.

Note: The DV-45 TL1 interface does not support timestamping, so all mandatory time fields are reported as 00:00:00.

TYPEREPThe TYPEREP parameter is equivalent to the CONDTYPE parameter.

Time parameters

Description

hh Hour of the day [00 to 23]

mm Minute of the hour [00 to 59]

ss Seconds of the minute [00 to 59]




Error codesThe error codes present in the errcde parameter of non-autonomous error response output messages are defined in the following table.

ERRCDE parameter

Description

ENEQ Equipment, not equipped

EQWT Equipment, wrong type

IBEX Input, block extra

IBMS Input, block missing

IBNC Input, block not consistent

ICNC Input, command not consistent

IDMS Input, data missing

IDNC Input, data not consistent

IDNV Input, data not valid

IDRG Input, data range error

IEAE Input, entity to be created already exists

IENE Input, specified object entity does not exist

IIAC Input, invalid access identifier

IICM Input, invalid command

IICM Input, invalid command verb

IICM Input, invalid second command code modifier

IIFM Input, invalid data format

IIPG Input, invalid parameter grouping

IISP Input, invalid syntax or punctuation

INUP Input, non-null unimplemented parameter

IPEX Input, parameter extra

IPMS Input, parameter missing

IPNV Input, parameter not valid

PICC Privilege, illegal command code

PIUI Privilege, illegal user identity

SAAS Status, already assigned

SADC Status, already disconnected

SLEM Status, list exceeds maximum

SNCC Status, not cross-connected

SNVS Status, not in valid state

SPNF Status, process not found

SROF Status, requested operation failed

—continued—




SSRE Status, system resources exceeded

SSTP Status, execution stopped due to hardware or software problem

SCOS Status, channel-out-of-service

ENFE Equipment, feature not provided

SDBE Internal data base error

—end—

ERRCDE parameter

Description




Summary of supported DV-45 TL1 AID parameters and surveillance alarms

The tables listed in Table 5-4 summarize the AID parameters and TL1 surveillance alarms supported by the NT2H35KA MCU for the DV-45 circuit packs.

Table 5-4Summary of TL1 AID parameters and surveillance alarms supported by the NT2H35KA MCU for DV-45 circuit packs

TL1 AID parameters supported for DV-45B coders Table 5-5

TL1 surveillance alarms supported for DV-45B coders Table 5-6

TL1 AID parameters supported for DV-45B decoders Table 5-7

TL1 surveillance alarms supported for DV-45B decoders Table 5-8

TL1 AID parameters supported for DV-45 DCS units Table 5-9

TL1 surveillance alarms supported for DV-45 DCS units Table 5-10

TL1 AID parameters supported for DV-45 MCUs Table 5-11

TL1 surveillance alarms supported for DV-45 MCUs Table 5-12

TL1 AID parameters supported for DV-45 OC3 line interface units

Table 5-13

TL1 surveillance alarms supported for DV-45 OC3 line interface units

Table 5-14

TL1 AID parameters supported for DV-45B BTSC coders Table 5-15

TL1 surveillance alarms supported for DV-45B BTSC coders Table 5-16

TL1 AID parameters supported for DV-45B BTSC decoders Table 5-17

TL1 surveillance alarms supported for DV-45B BTSC decoders Table 5-18

TL1 AID parameters supported for DV-45 Music-E45 multiplexers

Table 5-19

TL1 surveillance alarms supported for DV-45 Music-E45 multiplexers

Table 5-20

TL1 AID parameters supported for DV-45 Music-E45 demultiplexers

Table 5-21

TL1 surveillance alarms supported for DV-45 Music-E45 demultiplexers

Table 5-22

TL1 AID parameters supported for DV-45 Games-S45 multiplexers

Table 5-23

TL1 surveillance alarms supported for DV-45 Games-S45 multiplexers

Table 5-24

—continued—




TL1 AID parameters supported for DV-45 Games-S45 demultiplexers

Table 5-25

TL1 surveillance alarms supported for DV-45 Games-S45 demultiplexers

Table 5-26

TL1 AID parameters supported for DV-45 Stereo-FM45 multiplexers

Table 5-27

TL1 surveillance alarms supported for DV-45 Stereo-FM45 multiplexers

Table 5-28

TL1 AID parameters supported for DV-45 Stereo-FM45 demultiplexers

Table 5-29

TL1 surveillance alarms supported for DV-45 Stereo-FM45 demultiplexers

Table 5-30

—end—

Table 5-4Summary of TL1 AID parameters and surveillance alarms supported by the NT2H35KA MCU for DV-45 circuit packs




Table 5-5TL1 AID parameters supported for DV-45B coders

Supported AIDs AID ranges

CPK-<slot_id> Can appear in slots 0-7

NTSC-<slot>-1 Single NTSC input

T3-<slot_id>-1 Single DS3 output

Table 5-6TL1 surveillance alarms supported for DV-45B coders

AIDTYPE CONDTYPE DIRN NTFCNCDE SRVEFF Description

EQPT INT NA MJ SA Circuit Pack Failure

NTSC VSYNC RCV MJ SA Vertical Sync Loss

LPBKLINE NA MJ SA Facility Loopback Active

Table 5-7TL1 AID parameters supported for DV-45B decoders



NTSC-<slot>-1 Single NTSC output

T3-<slot_id>-1 Single DS3 input

Table 5-8TL1 surveillance alarms supported for DV-45B decoders



DS3 LOF RCV MJ SA Loss of Frame

T-BERP RCV MN SA DS3 Path Degrade

AIS RCV NA SA DS3 AIS

NTSC VSYNC TRMT MJ SA Vertical Sync Loss

BLACK TRMT NA NSA Black Active




Table 5-9TL1 AID parameters supported for DV-45 DCS units



T3-<slot_id>-1 Bidirectional DS3 line side interface

T3-<slot>-2 Bidirectional DS3 equipment side interface

DCOM-<slot>-0 All datacomm alarms ‘or’ed

Table 5-10TL1 surveillance alarms supported for DV-45 DCS units



DS3 LOF RCV MJ/MN SA Loss of Frame

T-BERP RCV MJ/MN (Note)

SA DS3 Path Degrade


DCOM INC RCV MN SA Data Channel Fail

Note: Equipment side (1) generates major alarm; line side (2) generates minor alarm.

Table 5-11TL1 AID parameters supported for DV-45 MCUs

Supported AID AID ranges

MCU MCU AID does not include slot_id

Table 5-12TL1 surveillance alarms supported for DV-45 MCUs


EQPT PWR NA MN SA Power Failure

BATT NA MN SA Battery Fail

CONTCOM NA MJ/MN (Note)

SA Control Comm Failure

SYSBOOT NA NA NSA MCU Reboot

Note: Major alarm if communications are lost with an OC3 line interface unit, otherwise minor.




Table 5-13TL1 AID parameters supported for DV-45 OC3 line interface units


CPK-<slot_id> OC3 only allowed in even slots

OC3-<slot>-1

STS1-<slot_id>-(1..3) Three bidirectional STS-1s

T3-<slot_id>-(1..3) Three bidirectional DS3s

Table 5-14TL1 surveillance alarms supported for DV-45 OC3 line interface units



MISM NA MJ SA Circuit Pack Mismatch

OC3 LOS RCV MJ SA Loss of Signal

LOF RCV MJ SA Loss of Frame

AIS RCV NA SA Line AIS

FERF RCV MJ SA Far End Receive Fail

T-BERL RCV MN SA Line BIP Degrade

T-BERS RCV MN SA Section BIP Degrade

T-LPR RCV MN SA Optical Low Power

STS1 AIS RCV NA SA Path AIS

UNEQ RCV MJ SA Path Unequipped

LOP RCV MJ SA Loss of Pointer

MISM RCV MJ SA Signal Label Mismatch

T-BERP RCV MN SA Patch BIP Degrade

YEL RCV MJ SA Path Yellow

DS3 LOS RCV MJ SA Loss of Signal

LOF TRMT MJ SA Loss of Frame

LOF (note) RCV MJ SA Loss of Frame


AIS TRMT NA SA DS3 AIS


T-BERP TRMT MN SA DS3 Path Degrade

LPBKLINE NA NA SA DS3 Loopback Active

Note: Loss of frame or bipolar violation less than 10e-3.




Table 5-15TL1 AID parameters supported for DV-45B BTSC coders


CPK-<slot_id>


NTSC-<slot>-1 Single NTSC input

Table 5-16TL1 surveillance alarms supported for DV-45B BTSC coders



NTSC VSYNC RCV MJ SA Vertical Sync Loss


Table 5-17TL1 AID parameters supported for DV-45B BTSC decoders


CPK-<slot_id>


NTSC-<slot>-1 Single NTSC output

Table 5-18TL1 surveillance alarms supported for DV-45B BTSC decoders






NTSC VSYNC TRMT MJ SA Vertical Sync Loss

BLACK TRMT NA NSA Black Active




Table 5-19TL1 AID parameters supported for DV-45 Music-E45 multiplexers


CPK-<slot_id>


MUSIC-<slot_id>-(1..7) Seven digital music inputs

Table 5-20TL1 surveillance alarms supported for DV-45 Music-E45 multiplexers



MUSIC LOS RCV MN SA Loss of Signal

Table 5-21TL1 AID parameters supported for DV-45 Music-E45 demultiplexers


CPK-<slot_id> Can only appear in even slots


MUSIC-<slot_id>-(1..7) Seven digital music outputs

Table 5-22TL1 surveillance alarms supported for DV-45 Music-E45 demultiplexers



MISM NA MJ SA Circuit Pack Mismatch

SYNC NA MJ SA Loss of Sync




MUSIC LOS TRMT NA SA Loss of Signal




Table 5-23TL1 AID parameters supported for DV-45 Games-S45 multiplexers



T3-<slot_id>-1 Single bidirectional DS3

GAME-<slot_id>-(1..2) Two games inputs

Table 5-24TL1 surveillance alarms supported for DV-45 Games-S45 multiplexers



PROVERR NA MJ SA Bad Channel Selected




GAME LOS RCV MN SA Loss of Signal

SYNC RCV MN SA Loss of Input Clock

Table 5-25TL1 AID parameters supported for DV-45 Games-S45 demultiplexers




GAME-<slot_id>-(1..2) Two games outputs




Table 5-26TL1 surveillance alarms supported for DV-45 Games-S45 demultiplexers




SYNC NA MJ SA Loss of sync




GAME LOS TRMT NA SA Loss of Signal

Table 5-27TL1 AID parameters supported for DV-45 Stereo-FM45 multiplexers


CPK-<slot_id>


FM-<slot_id>-(1..6) Six FM baseband inputs

Table 5-28TL1 surveillance alarms supported for DV-45 Stereo-FM45 multiplexers







FM LOS RCV MN SA Loss of Signal

Table 5-29TL1 AID parameters supported for DV-45 Stereo-FM45 demultiplexers


CPK-<slot_id>


FM-<slot_id>-(1..6) Six FM baseband outputs




Table 5-30TL1 surveillance alarms supported for DV-45 Stereo-FM45 demultiplexers







FM LOS TRMT MN SA Loss of Signal

Table 5-31TL1 AID parameters supported for DV-45 MPEG encoders


CPK-<slot_id>

VIDEO-<slot_id> Single video input

T3-<slot_id>-<ds3_id> Single DS3 output

AUDIO-<slot_id>-<channel_id> Multiple audio input

MPEG-<slot_id>-1 Single MPEG2 output

Table 5-32TL1 surveillance alarms supported for DV-45 MPEG encoders




TEMP NA MN NSA Medium temperature

TEMP NA MJ NSA High temperature




VIDEO VSYNC RCV MJ SA Video Sync Loss


TST TRMT NA SA Test pattern active

AUDIO LOS RCV MJ SA Loss of Signal




Table 5-33TL1 configurations supported for DV-45 MPEG encoders


DS3 FIRST TRMT NA SA First T2 of the program

LEN TRMT NA SA Length of the program

TL_MODE RCV NA SA Terminal Mode

VIDEO D1_MODE RCV NA SA D1 Mode

FMT RCV NA SA Video Format Selection

SRC RCV NA SA Video Source Selection

TST TRMT NA SA Generate Test Pattern

LPBK NA NA SA Enable Loopback

BIT_RATE TRMT NA SA Video encoding bit rate

MPEG CLK_SRC RCV NA SA MPEG Clock Source selection

VI_PID TRMT NA SA Video stream PID

AU_PID TRMT NA SA Audio stream PID

PCR_PID TRMT NA SA PCR stream PID

MODE TRMT NA SA I, IP, or IBP mode

BIT_RATE TRMT NA SA Total encoding bit rate

AUDIO RATE TRMT NA SA Audio rate selection

SRC RCV NA SA Audio source selection

BIT_RATE RCV NA SA Audio encoding bit rate

Table 5-34TL1 AID parameters supported for DV-45 MPEG decoders


CPK-<slot_id>

VIDEO-<slot_id> Single NTSC output

T3-<slot_id>-<ds3_id> Single DS3 input

AUDIO-<slot_id>-<channel_id> Multiple audio output

MPEG-<slot_id>-1 Single MPEG2 input




Table 5-35TL1 surveillance alarms supported for DV-45 MPEG decoders




TEMP NA MN NSA Medium temperature

TEMP NA MJ NSA High temperature




VIDEO VSYNC TRMT MJ SA Video Sync Loss

BLACK TRMT NA SA Black Active

TST TRMT NA SA Test pattern active

AUDIO LOS RCV MJ SA Loss of Signal

Table 5-36TL1 configurations supported for DV-45 MPEG decoders


DS3 FIRST TRMT NA SA First T2 of the program


VIDEO FMT TRMT NA SA Video Format Selection

BLACK TRMT NA SA Insert black signal

FREEZE TRMT NA SA Freeze frame

TST TRMT NA SA Generate test pattern

DST TRMT NA SA Video destination selection

MPEG VI_PID TRMT NA SA Video stream PID

AU_PID TRMT NA SA Audio stream PID

PCR_PID TRMT NA SA PCR stream PID

AUDIO SRC TRMT NA SA MPEG source selection

LEVEL TRMT NA SA Set audio level

MUTE TRMT NA SA Set audio to mute




Table 5-37TL1 AID parameters supported for DV-45 323 MUX modules


CPK-<slot_id>

T3-<slot_id>-<1..3> Multiple directional DS3

T2-<slot_id>-(1..7) Multiple directional DS2

Table 5-38TL1 surveillance alarms supported for DV-45 Mux modules







DS2 LOS TRMT MN SA Loss of Signal

Table 5-39TL1 configurations supported for DV-45 Mux modules


DS3 FIRST TRMT NA SA First T2 of the program in incoming T3


POS TRMT NA SA Position of the program in outgoing T3

LBO TRMT NA SA LBO for outgoing DS3

PST TRMT NA SA Primary DS3 state (in-service or out-of-service)

TL_MODE RCV NA SA Terminal mode




Table 5-40TL1 AID parameters supported for DV-45 323 IMux modules



T3-<slot_id>-<1..3> Multiple directional DS3

Table 5-41TL1 surveillance alarms supported for DV-45 323 IMux modules






Table 5-42TL1 configurations supported for DV-45 323 IMux modules


DS3 FIRST TRMT NA SA First T2 of the program in incoming T3


POS TRMT NA SA Position of the program in outgoing T3

LBO TRMT NA SA LBO for outgoing DS3




System Applications 323-1401-150 FWP02 3.01

iii


DV-45 applications 1-1Introduction 1-1

Network Quality 1-1Broadcast quality – DV-45BQ 1-1Optional plug-ins 1-2DV-45 ordering 1-2

_______________________________________________________________________________________________________

Video applications 2-1Introduction 2-1Video distribution 2-2Broadcast Quality DV-45BQ 2-2Time Base Correction (TBC) 2-2VITC 2-5Video switching 2-5

Analog switches 2-5Synchronization 2-5Frame store option 2-5DS3 switches 2-6

_______________________________________________________________________________________________________

Miscellaneous Applications 3-1Security 3-1Electronic news gathering (ENG) 3-1Medical imaging 3-1Video conferencing 3-3Replace RA-3 3-3

Educational Applications 3-6Digital Video Learning Network 3-6

_______________________________________________________________________________________________________

Audio applications 4-1Audio traffic 4-1Switching 4-1Data/remote controls 4-1

Digital Video Codec DV-45 FWP02 3.01NTP Update 94-015 January 1995

iv Contents

Data applications 5-1Data applications 5-1DS1 applications 5-1

_______________________________________________________________________________________________________

DV-45 video demonstration system 6-1Components 6-2

DV-45 Equipment 6-2Sources 6-2Monitors 6-3Power 6-3Presentation material 6-3Waveform monitor 6-4Fiber demonstration 6-5Audio 6-5Troubleshooting the demonstration system 6-5

_______________________________________________________________________________________________________

DV-45 Digital Video Learning Network applications 7-1New Hardware Codes 7-2New Software Codes 7-2Features 7-3

Multi-Cell Networks Configuration 7-3Cell Autonomy 7-6Multiple DS-3 Feeds per Classroom Configuration 7-6Broadband OSS Interface Configuration 7-7Configurator Menu 7-8551 and 555 Quad Split Systems 7-9Room Reservation 7-11Point-to-Point Classes 7-11Alcatel DS3 Cross-Connect Interface 7-12Enhanced Class Overrun Control 7-12Software Packaging and Computer Memory Requirements 7-12

DVLN 3.0 Hardware Requirements 7-13Multi-Cell Network Hardware Requirements 7-13Multiple DS3 per Shelf Network Hardware Requirements 7-17

Alarms 7-19Fault Conditions 7-19Fault Recovery and Power UP 7-19

Operating Performance 7-20User Operating Environment 7-20System Requirements - Operation 7-20Man-Machine Interface 7-20System Security 7-20Power Requirements 7-20NTPs/Software Documentation 7-20

_______________________________________________________________________________________________________

FiguresFigure 2-1 DV-45 video entrance links 2-3Figure 2-2 DV-45 video distribution 2-4Figure 2-3 Switching of multiple inputs to DV-45 2-7

Figure 2-4 DV-45 with studio video switcher 2-8Figure 2-5 Digital switching application with data (with Data Comm Sync

unit) 2-9Figure 3-1 Surveillance 3-2Figure 3-2 Video conferencing 3-4Figure 3-3 Replacing an RA-3 analog radio system with DV-45 and a digital

radio system 3-5Figure 3-4 Digital Video learning Network 3-6Figure 5-1 RS-232/RS-422 Data Applications 5-2Figure 5-2 DS1 application remote switches/channel banks 5-3Figure 6-1 Basic Video demonstration set-up 6-2Figure 6-2 A waveform monitor and a second video monitor added to the

basic system 6-4Figure 6-3 DS3 connections to an OC-12 optical transport system 6-6Figure 7-1 2-Cell Multicell Network 7-4Figure 7-2 4-Cell Multicell Network 7-5Figure 7-3 Multiple Video Feeds Per Classroom Multicell Network 7-7Figure 7-4 Broadband OSS Network 7-8Figure 7-5 Signal Flow of 5:5:1 Quad Split System 7-10Figure 7-6 Signal Flow of 5:5:5 Quad Split System 7-11Figure 7-7 Quad Split Hardware Set-up 7-15_______________________________________________________________________________________________________

TableTable 6-1 Video demonstration troubleshooting guidelines 6-5

System Applications 323-1401-150 FWP02 3.01NTP Update 94-015 January 1995

Contents iv.1

iv.2 Contents


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Miscellaneous Applications 3-5



Replacing an RA-3 analog radio system with DV-45 and a digital radio system

70 MHzIF

RA-3Tx

(a) RA-3 Analog Radio Video Transmission System

RM-3ModulatorNTSC

Video70 MHz

IF

RM-3Demodulator

RA-3Rx

VideoClampingAmplifierNTSC

Video

DS3(45 Mb/s)

(b) Digital Radio Video Transmission System

DV-45Coder

NTSCVideo

DS3(45 Mb/s)

DV-45Decoder

NTSCVideo

SONETRadio

SONETRadio

Diplexer

Video

Audio

Diplexer

Audio

AudioAudio

3-6 Miscellaneous Applications


Educational applicationsThe DV-45 can be used in educational applications. Unidirectional channels candistribute educational video material and bidirectional channels can provideinteractive education.

Digital Video Learning NetworkThe Digital Video Learning Network (DVLN) is an interactive, computercontrolled, educational product from Northern Telecom. Refer to new Chapter 7 inthis Section for additional description concerning DVLN applications. DVLN NTP(NT2H65AB) and User Guides provide the complete literature.

In the DVLN (see Figure 3-4), a number of remotely located classrooms areconnected by bidirectional video links to a central site. At the central site, a DS3switch selects which classroom will be seen and heard at the others.

A microcomputer serves as a system controller by linking with other micros locatedat the remote sites. The instructor has scanning and preview controls to view theremote sites, and can allow a remote class to broadcast to all classrooms.


Digital Video Learning Network

RemoteClass 2

SwitchSite

Controller

TeacherClass 4

RemoteClass 6

RemoteClass 5

RemoteClass 3

RemoteClass 7

RemoteClass 1

System Applications 323-1401-150 FWP02 3.01NTP Update DV-45-R3.04 June 1997

6-1

DV-45 video demonstration systemThis chapter provides a video demonstration system for trade shows, salesdemonstrations and technical evaluations. Products named here are only suggestedand standard equipment can be substituted.

Equipment:DV-45 shelf (NT2H50AC)DV-45B coder unit (NT2H03AA)DV-45B decoder unit with FS (NT2H04BA)-48 Volt Power Source, 1.0 ampere75 Ω BNC terminations A0367547

Video source:Camera – Elmo TSN-271 with lensVideo disk player – Consumer modelNTSC test signal generator – Tektronics 1910

orVTR with time-base correction – Sony Betacam SP-75 or consumer VCR with

Hotronics AP41 TBC unit.

Video monitor:Sony PVM2030 professional video monitor

Coaxial cables – RG59 with BNC and/or RCA connectors

Presentation material.

Video switch – Videotek PVS-6

6-2 DV-45 video demonstration system


ComponentsThe basic video demonstration set-up, as shown in Figure 6-1, requires thefollowing.

DV-45 EquipmentThe DV-45 shelf provides eight universal coder /decoder positions. Equip one slotwith a DV-45 coder and a second with a DV-45 decoder. DV-45BQ units can beused for better video transmission quality. A DV-45B decoder unit must be usedwith a DV-45B coder.

An MCU or DCS unit may be added to the demonstration system as long as thepower supply can accommodate the increased load. Blank/Information units can beput in the unused slots for cosmetic enhancement.

SourcesThe DV-45 uses the NTSC composite video signal. This is labeled Comp Out orFull Field Out on professional systems and Video Out on consumer equipment.Only one source is required; multiple sources can be selected with a bang box videoswitch.


Basic video demonstration set-up

VideoSource

BNCor RCA

VideoOut

BNC

VideoIn

Mon

Coder

DV-45Shelf

Decoder

BNC BNC

RG-59

Video OutA Bat -

B BatA Ret

B Ret

48 VoltSource1.0 Amp

BNC

75Ω

BNC

75Ω

A

B

VideoMonitor

DS3Out

DS3In


NTP Update 94-015 January 1995

7-1

DVLN Digital Video Learning Network

applications 7-

The Digital Video Learning Network (DVLN) is an interactive educational system using Northern TelecomÕs DV45B digital video technology. A teacher at a single location can connect to and interact with students at multiple remote locations.

DVLN 3.0 provides a cell based architecture where a number of DS3 switching elements are interconnected via a Þber transport system to a central switching site. Within each switching element (or cell) are a Þnite number of schools, universities, libraries etc.

The system is controlled by a distributed network of microcomputers. These communicate with each other using in-band communications channels within the DS3 signals which transport encoded video and audio around the network.

Each cell is controlled by a Multi-Cell Controller (MCC) application running on an IBM compatible PC. Each MCC is responsible for running and shutting down individual class sessions.

The central switch site is controlled by a Multi-Cell System Controller (MSC) application, running on an IBM compatible PC. This provides a centralized OAM interface for system conÞguration, class scheduling and network surveillance. It is also responsible for setting up inter-cell trunking for classes which span more than one cell.

The MCC and MSC functions are provided by individual software application packages.


7-2

DVLN Digital Video Learning Network applications

Digital Video Codec DV-45 323-1401-150 FWP02 3.01


New Hardware Codes

¥ DVLN Decoder, Without Frame Store, NT2H04DA, VOTRTFU3AADVLN Decoder, With Frame Store, NT2H04EA, V0TRTFV3AA

These decoders are required to support DVLN 3.0.The main change between these new decoders and previous decoders is the addition of on-board audio muting and mixing capabilities. Previous versions of Decoder units can be upgraded by changing the Þrmware. Equipping the network with decoders with frame store (NT2H04EA) is strongly recommended, as this decoder will prevent picture roll following DS3 switching.

¥ DVLN Data Comm Sync (DCS) Unit, NT2H31CA, VOTR1XW3AA

This unit is used to process data communication signals routed through the network and is capable of processing synchronous RS-232 and RS-422 data up to 64 kbps. This unit has a new Þrmware load which is required to run DVLN 3.0. Previous versions of DCS units can be upgraded by changing the Þrmware in the Þeld. The DCS card must be upgraded at both ends to establish a functional datacomm channel.

¥ DVLN Maintenance Control Unit (MCU), NT2H35KA, VOTRWCY3AAThe MCU is the administration, control and alarming center for the DV-45 shelf. This unit has a new Þrmware load which is required to run DVLN 3.0. Old units can be upgraded by changing the Þrmware in the Þeld.

New Software Codes

DVLN 3.0 has three new distinct software packages:

¥ MSC Software, NT2H60BA, VOXXB001AA

This software load can be conÞgured to operate in one of three modes:

i. MSC Controller: In this mode the software will act as a Multi-Cell Systems Controller.

ii. Custom SCMP Controller (CSC): In this mode, the software will control a Broadband OSS type network.

iii. Single Cell System Controller (SSC): In this mode, the software will control a single cell network.

¥ MCC Software NT2H60CA, VOXXC001AA

This software load is used to run the DVLN 3.0 Multi-cell Cell Controller. It can only be conÞgured to act as a Multi-Cell Controller.

¥ Classroom Interface Software NT2H61BA, VOXXA001AA

This software runs DVLN 3.0 on the Classroom Macintosh Computer.


7-3



Features

Multi-Cell Networks ConÞguration

A multi-cell DVLN network consists of a central DS3 switch connected via DS3 trunks to a number of remote DS3 switches. The remote switches are in turn connected to a number of classrooms by DS3 lines (classrooms can also be connected directly to the central switch). Each remote switch with associated classrooms and switching site equipment is called a

cell.

DVLN 3.0 Multi-Cell networks allow phased expansion through the addition of new cells or the addition of classrooms to existing cells. Multi-cell networks can contain up to

30 cells

. Each cell can support up to

60 classrooms

for a maximum of

1800 classrooms

in the network.

DVLN 3.0 allows for a variety of different class session types. The type of class sessions which can be scheduled are Continuous Presence, Multipoint, Point to Point, and Network Wide.

A continuous presence class session is deÞned to be a class session in which all participants can hear and see each other at all times during the class session. This is accomplished through the use of quad split systems or alternately, multiple DS3 feeds per classroom. In quad split based networks, up to 5 classroom sites can participate in one continuous presence class session.

A Multipoint class session is one in which one class participant can be put on air at any one time. In this case, a certain measure of interactivity is provided through the ability to put any participant Ôon AirÕ. Up to a maximum of 16 classroom sites can take part in one Multipoint class session.

In a Network class session, all participants will see and hear the Teacher only. The Teacher is on air all the time.

Figure 7-1 illustrates a 2 cell Multicell network. In this case, there is a ÒMaster cellÓ containing an MSC and a ÒSlave cellÓ containing a MCC. Both cells can contain Classrooms and quad-split subsystems.

Figure 7-2 illustrates a 4 cell Multicell network with DS-3 trunking and quad split systems. Each cell in the network has a unique address. The cell which contains the MSC is always referred to as Cell 0. The other cells are numbered sequentially starting with Cell 1. Note that cells #1 and #2 both contain Quad Split Systems. One QS System can be used to set up a continuous presence class session containing up to 5 classrooms located in the same cell or in different cells.

7-4




The number of trunks per cell has to be resolved on a case-by-case basis. The following should be noted:

¥ If a classroom participates in a class run from another cell, two trunks are required:

Ð One from the local cell to the central switching site.

Ð One from the central switching site to the remote cell.

¥ If a cell does not have enough resources (such as quad-split subsystems), it cannot be selected to run a particular class, even if it provides the optimal trunking arrangement. Normally, the cell selected provides the optimal trunk arrangement,

DVLN 3.0 scheduling capabilities are enhanced to support classes which span multiple cells. Trunking and other resources (such as quad-split systems) are assigned automatically, and conßicts are detected and reported. The operator is informed of conßicting classes and of the resources causing the conßict.

Once a class has been scheduled, a speciÞc cell is selected to run the class. At the start of the session, DS3 signals from classrooms in other cells are backhauled via the central switching site to the selected cell. The DS3 switch in the selected cell then performs all interactive switching during the class.

Figure 7-12-Cell MultiCell Network

T-R-A-N-S-P-O-R-T-

T-R-A-N-S-P-O-R-T-

T-R-A-N-S-P-O-R-T-

Classroom-#1-

Classroom-#2-

Classroom-#3-

Master cell--

Switching-site-

equipment-

MSC-

QS system-

Classroom-#1-

Classroom-#2-

Classroom-#3-

Slave cell--

Switching-site-

equipment-

QS system-

DS-3-trunk-lines-

MCC-


7-5



Figure 7-24-Cell MultiCell Network

Cell #1-

Classroom-#1-

Classroom-#2-

Classroom-#3-

Classroom-#4-

Classroom-#15-

T-R-A-N-S-P-O-R-T-

Switching-site-

equipment-

MCC #1-

Cell #0-

QS system-

Data-

Switching-site-

equipment-

MSC-

Data-

Cell #2-

Classroom-#1-

Classroom-#2-

Classroom-#3-

T-R-A-N-S-P-O-R-T-

Switching-site-

equipment-

MCC #2-

Cell #3-

T-R-A-N-S-P-O-R-T-

QS system-

Data-

Switching-site-

equipment-

MCC #3-

Data-

DS-3 trunk lines-

Classroom-#1-

Classroom-#2-

Classroom-#3-

Classroom-#4-

Classroom-#15-

7-6




Cell Autonomy

Although class sessions can only be scheduled at the MSC, each cell controller in a Multicell Network is capable of running a class session once scheduled.If a communication fail occurs between a MCC and the Multi-Cell System Controller, the MCC will operate as follows:

¥ Classrooms in other cells will not be accessible.

¥ Classes will be started and ended based on the schedule in effect immediately prior to the failure. Each MCC has a local copy of the schedule, which is continuously updated by the MSC during normal operation.

All logs, alarms etc. will be buffered by the MCC and uploaded to the MSC once the failure condition clears.

Multiple DS-3 Feeds per Classroom ConÞguration

Up to three DS3 feeds per classroom is supported by DVLN 3.0 as an alternative to quad-split based continuous presence conÞgurations. In this conÞguration, each classroom will receive up to3 DS3 feeds from the network and will continue to generate a single DS3 output. Figure 7-3 illustrates this network. As in the Multicell network case,this network allows the scheduling of Continuous Presence, Multipoint, and Network wide class sessions.

This conÞguration results in a 3:1 ratio of switch outputs to inputs.

If this option is used with a Ditech switch, the number of rooms supported per cell will be reduced by a factor of 3, since the maximum Ditech switch size is 64x64.

Interworking between this conÞguration and quad-split systems is not supported by DVLN 3.0.


7-7



Figure 7-3Multiple Video Feeds Per Classroom MultiCell Network

Broadband OSS Interface ConÞguration

DVLN 3.0 supports a mode of operation which allows users to supervise independent DVLN MCC's within a switched ATM network. DVLN scheduling functions will be disabled in this mode and all classes will be scheduled and initiated by a Broadband OSS (BOSS). When operating in this mode, the DVLN controller is referred to as a Custom SCMP Controller (CSC).

Figure 7-4 illustrates a Broadband OSS Interface network. At the start of each class session, the BOSS establishes DS3 connections from each participating classroom to a Ditech Switch over the ATM network. Circuit emulation is provided by an ATM Service Multiplexer located in each classroom.

Once the connections are in place, details of the session to be run are downloaded to the DVLN controller using a special protocol. The CSC then runs the class independently of the OSS. Class termination handling (including overrun requests) are negotiated between the BOSS and the CSC.

Cell #0-

Classroom-#1-

3-Classroom-

#2-3-

Classroom-#3-

3-Classroom-

#4-3-

Classroom-#5-

3-Classroom-

#6-3-

T-R-A-N-S-P-O-R-T-

Switching-site-

equipment-

Unidirectional-DS-3-

Bidirectional-DS-3-

MSC--

T-R-A-N-S-P-O-R-T-

Cell #1-

Classroom-#1-

3-

Classroom-#2-

3-

Classroom-#3-

3-

T-R-A-N-S-P-O-R-T-

Unidirectional-

Bidirectional-

Switching-site-

equipment-

MCC-

7-8




Figure 7-4Broadband OSS Network

ConÞgurator Menu

A new ConÞgurator application will be supplied to install, conÞgure and expand the DVLN system. Using this application, the user will be able to:

¥ Select the mode of operation of the controllers depending on system conÞguration

¥ Add and delete cells and rooms

¥ Select the type of DS3 switch to be used (Ditech/Alcatel)

¥ Map rooms and trunks to switch ports

¥ Select idle ports which will be fed to all classrooms when not in use

¥ Add, delete and conÞgure quad split systems

¥ ConÞgure other items such as room names and passwords

When installing DVLN 3.0 software in a new Controller, the mode of operation (MSC, MCC, SSC,CSC) is provisioned locally. All other conÞguration changes are made at the MSC only and downloaded automatically to individual MCCÕs.

The ConÞgurator can be run directly on a Controller, or may be run on any 486 IBM compatible PC with at least 4Mb of RAM. This allows conÞguration changes to be made off-line and then loaded onto the DVLN network during network maintenance activities.ConÞguration data can be saved to disk for easy re-loading of this data in the event of a system failure.

Changing the system conÞguration will result in re-initialization of all controllers in the DVLN network, and therefore cannot be done in-service. The network administrator is required to initiate a re-veriÞcation of the network schedule after loading a new conÞguration.

Classroom-#1-

Classroom-#2-

Classroom-#3-

ATM-switched-network-

Smux-

Smux-

Smux-

DS-3-switch-

DCS-

DCS-

DCS-

CSC-OSS-

QS system-


7-9



551 and 555 Quad Split Systems

Two new quad-split system conÞgurations (551 and 555) are available in DVLN 3.0. These allow continuous presence video and audio class sessions to be scheduled in Multicell networks for class sessions spanning up to Þve sites.

The 551 system shown in Figure 7- 5, will require Þve decoders, Þve coders and one Panasonic Quad Split unit. In a multi-site continuous presence class session, one on-air site will receive a quad-split image of the other participants; the other participants will receive a full screen image of the on-air site. The on-air site can be selected dynamically from the teacher classroom site using the teacher Classroom Macintosh interface. Audio is provided on a continuous presence basis throughout. Everyone hears everyone else all the time.

The 555 system, shown in Figure 7-6, will require Þve decoders, Þve coders, 5 Panasonic Quad Split units, and a DIO-96 Parallel Input/Output card. It provides the same capabilities as the 551. In addition, during a 5 site continuous presence session, it allows all 5 classrooms to receive a quad-split image of the other four participants. This is made possible through the use of the DIO-96 parallel Input/Output unit. This card is installed in a spare expansion slot on the controller PC. The DIO-96 unit controls the 5 Quad split units, in order to send the correct quad image to each of the 5 sites in the network.

Both new quad split conÞgurations will eliminate the need for an external audio mixer. Audio mixing occurs directly on the decoder units in each classroom.

All new DVLN 3.0 networks should use either the 551 or 555 Quad split system conÞgurations. However, DVLN 3.0 still supports 441.

DVLN 3.0 allows for one quad-split type to be deployed in a Multi-cell network. Thus, if 555 is the quad split system type chosen, then all quad split systems in the Multi-Cell network must be 555.

7-10




Figure 7-5Signal Flow of 5:5:1 Quad Split System

Coder 15

2 34 5

Coder 21

5 34 5

Coder 31

2 54 5

Coder 41

2 35 5

Coder 51

2 34 Q

Decoder 1

Decoder 2

Decoder 3

Decoder 4

Decoder 5

DS3

Q1

Q2

Q3

Q4

Q5

Q1

Q2

Q3

Q4

Q5

T

S1

S2

S3

S4

T

S1

S2

S3

S4

Switch

Pana

soni

cQ

S Un

it

Legend:AudioVideoDS3

Audio DistributionAmplifiers

12345


7-11



Figure 7-6Signal Flow of 5:5:5 Quad Split System

Room Reservation

Scheduling capabilities are enhanced in DVLN 3.0 to permit classrooms to be reserved for other activities. Once a room is reserved, it will not be available for DVLN classes for the duration of the reservation period. An appropriate reservation message is displayed on the classroom Mac interface.

Point-to-Point Classes

Scheduling capabilities are enhanced in DVLN 3.0 to permit explicit scheduling of point-to-point classes.

Decoder 1

Decoder 2

Decoder 3

Decoder 4

Decoder 5

DS3

Q1

Q2

Q3

Q4

Q5

Q1Q2Q3Q4Q5

T

S1

S2

S3

S4

T

S1

S2

S3

S4

Switch

Legend:AudioVideoDS3

Audio DistributionAmplifiers

12345

Coder 152 34 Q1

Coder 215 34 Q2

Coder 312 54 Q3

Coder 412 35 Q4

Coder 512 34 Q5

QS Unit 152 34

QS Unit 215 34

QS Unit 312 54

QS Unit 412 35

QS Unit 512 34

7-12




Alcatel DS3 Cross-Connect Interface

DVLN 3.0 supports an Alcatel DS3 cross connect as an alternative to the Ditech DS3 Switch. While not recommended due to slow switching times, the capability is provided.

The Alcatel DS3 Cross-Connect is controlled using a TL-1 based interface. All capabilities provided with a Ditech DS3 switch are supported for the Alcatel cross-connect, but the user will be warned about scheduling sessions that require interactive, real-time video switching.

Although the Alcatel cross-connect can support more ports, the maximum total number of classrooms per cell is limited to 60 (as with the Ditech DS3 Switch).

Enhanced Class Overrun Control

In DVLN 3.0, the Teacher Mac displays a Ôclass endingÕ message 5 minutes before the end of a session. The Teacher is given the option of requesting a class overrun. If no overrun is requested, the class will be terminated on time and all network resources released. If an overrun is requested and granted, the class will continue until the new end time is reached or the class is ended manually. All overrun periods will be guaranteed once granted.

Class overrun will not be allowed to spill over into the time alloted for another class session.

Software Packaging and Computer Memory Requirements

DVLN 3.0 has three distinct software packages:

¥ MSC Software (including ConÞgurator) (NT2H60BA)

This software load can be conÞgured as a MSC, CSC, or SSC. One copy per network is required.In order to run MSC software, a PC with 4MB of free RAM is required.The MSC Software is delivered on a 1.4M 3.5Ó MF-2HD ßoppy disk formatted with DOS.

¥ MCC Software (NT2H60CA)

This software load is used to run the Multicell Cell Controller. One copy per cell in a network is required.In order to run MCC software, a PC with 4MB of free RAM is required.The MCC Software is delivered on a 1.4M 3.5Ó MF-2HD ßoppy disk formatted with DOS.

¥ Classroom Interface Software (NT2H61BA)

This software runs DVLN 3.0 on the Classroom Macintosh Computer. One copy per classroom site is required.


7-13



Classroom Software is delivered on a 1.2M 3.5Ó MF-2HD ßoppy disk with an HFS Macintosh format.

A Macintosh with at least 4 MB of RAM and a hard disk is strongly recommended to run classroom interface software.

DVLN 3.0 Hardware Requirements

Multi-Cell Network Hardware Requirements

Multi-Cell Classroom Hardware Requirements

As a minimum, DVLN V3.0 will require the following DV45B units in each classroom in the multicell network. The DV-45B units are installed in a single shelf which can be mounted in a Distance Learning Terminal Cabinet.

¥ One MCU (NT2H35KA): Used to support remote alarm gathering and the Receive Mute function.

¥ One DV45B Decoder unit equipped with the Frame Store option (NT2H04EA): The frame store version is recommended to prevent picture roll following DS3 switching. However, Decoder without frame store (NT2H04DA) can also be used.

¥ One DV45B Encoder unit (NT2H03AA)

¥ One DCS unit (NT2H31CA): This unit, optioned in DVLN mode, supplies two RS422 channels. One is used to carry RS-422 DVLN protocol leaving one serial channel free for customer use.

In addition, the following OEM equipment is required at each classroom site to properly run a class session:

¥ One Macintiosh computer with at least 4 Mb of RAM and a hard drive.

¥ Video camera

¥ At least one video monitor.

¥ Audio Speaker(s).

The following classroom OEM equipment is optional, but enhances the function of DVLN 3.0 at the classroom site:

¥ VSI video controller equipment

7-14




MCC Site Hardware Requirements

The following DV45B equipment must be supplied at

each

MCC Switching Site:

¥ At least one DV45 shelf equipped with an MCU and up to eight DCS units, one for each remote classroom connected to the cell. For example, if 12 classrooms are connected to the cell, then 2 DV-45 shelves, one equipped with 8 DCS units and 1 MCU, and the other equipped with 4 DCS units and 1 MCU, are required.

¥ At least one DV-45 shelf equipped with one DCS unit for handling communication between the MCC and the MSC, and a Digital Video Synchronization Unit (DVSU) for each DS3 trunk line running between the cell and the central cell. The central cell is deÞned to be the cell which contains the MSC.The DVSU unit is unidirectional, and itÕs purpose is to insure that no switch errors are transmitted down the line.

¥ At least one DS3 switch. The switch size required depends on a number of parameters including the number of classrooms connected to the cell, the number of DS3 trunk lines connected to the cell, and the number of quad split systems connected to the switch.

In addition, the following OEM equipment is required at each MCC site to properly run a class session:

¥ Release 3.0 requires a 486DX-33 based PC or higher with at least 4MB of RAM, using the 8MHz ISA bus. A mouse and a color VGA monitor are highly recommended. DVLN 3.0 will work with DOS version 5 or higher. Optional Multi-Cell conÞgurations, such as quad split, require additional hardware to implement. In addition, optional OEM equipment which enhances the use of DVLN is also available. The following outlines the various options and their speciÞc hardware requirements:

¥ Quad Split Continuous Presence ConÞguration. Each Quad split system will require two DV-45 shelves. One shelf houses DV-45B Decoder units and the other houses DV-45B coder units. In addition, 1 to 5 Panasonic Quad Split units are required. To implement a 555 QS system requires a DIO-96 Parallel I/O board,. Audio distribution ampliÞers are required for both QM 551, and 555. Figure 7-7 illustrates the hardware set -up of the two new quad split systems supported by DVLN 3.0.

¥ Optional Sigma Video distribution ampliÞers are used to amplify video signals.


7-15



Figure 7-7Quad Split Hardware Set-up

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

M-C-U-

C-o-d-e-r-

C-o-d-e-r-

C-o-d-e-r-

C-o-d-e-r-

C-o-d-e-r-

Audio distribution amps-

Quad split unit-

551-

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

D-e-c-o-d-e-r-

M-C-U-

C-o-d-e-r-

C-o-d-e-r-

C-o-d-e-r-

C-o-d-e-r-

C-o-d-e-r-

Audio distribution amps-

Quad split #1-

Quad split #2-

Quad split #3-

Quad split #4-

Quad split #5-

555-

50-pair-cable-

To DIO-96-board-

7-16




MSC Site Hardware Requirements

The following DV45B equipment must be supplied at the MSC Switching Site:

¥ At least one DV45 shelf equipped with an MCU and up to eight DCS units, one for each remote classroom connected to the cell. For example, if 12 classrooms are connected to the cell, then 2 DV-45 shelves, one equipped with 8 DCS units and 1 MCU, and the other equipped with 4 DCS units and 1 MCU, are required.

¥ At least one DV45 shelf equipped with DCS and DVSU units. This shelf is used to carry data communication between the MSC and each MCC, and, to carry DS3 trunk lines. One DCS card is required per each remote cell, to be used to carry data communication between the MSC and an MCC. In addition, one DVSU unit is required per DS3 trunk line going from the central cell site to a cell site.

¥ At least one DS3 switch. The switch size required depends on a number of parameters including the number of classrooms connected to the cell, the number of DS3 trunk lines connected to the cell, and the number of quad split systems connected to the switch.

In addition, the following OEM equipment is required at each MSC site to properly run a class session:

¥ A 486DX-33 based PC or higher with at least 4MB of RAM, using the 8MHz ISA bus. A mouse and a color VGA monitor are highly recommended. DVLN will work with DOS version 5 or higher.

Optional Multi-Cell conÞgurations, such as quad split systems, require additional hardware to implement. In addition,optional OEM equipment which enhances the use of DVLN is also available. The following outlines the various options and their speciÞc hardware requirements:

¥ Quad Split Continuous Presence ConÞguration. Each Quad split system will require two DV-45 shelves. One shelf houses DV-45B Decoder units and the other houses DV-45B coder units. In addition, 1 to 5 Panasonic Quad Split units are required. To implement a QM 555 QS system requires a DIO-96 Parallel I/O board,. Audio distribution ampliÞers are required for both QM 551, and QM 555. Figure 7-7 illustrates the hardware conÞguration of the two new quad split systems supported by DVLN 3.0.

¥ Optional Sigma Video distribution ampliÞers are used to amplify video signals.


7-17



Multiple DS3 per Shelf Network Hardware Requirements

Multiple DS3 per Shelf - Classroom Hardware Requirements

The following DV-45 equipment is required at each classroom site to implement the Multiple DS3 per shelf conÞguration. The equipment is housed in a DV-45 Shelf:

¥ One MCU (NT2H35KA): Used to support remote alarm gathering and the Receive Mute function.

¥ Up to three DV45B Decoder units equipped with the Frame Store option (NT2H04EA). The frame store version is recommended to prevent picture roll following DS3 switching. However, Decoders without frame store (NT2H04DA) can also be used.

¥ One DV45B Encoder unit (NT2H03AA)

¥ One DCS unit (NT2H31CA): This unit, optioned in DVLN mode, supplies two RS422 channels. One is used to carry RS-422 DVLN protocol leaving one serial channel free for customer use.

In addition, the following OEM equipment is required at each classroom site to properly run a class session:

¥ One Macintiosh computer with at least 4 Mb of RAM and a hard drive.

¥ A video camera

¥ One or more video monitor. Typically, 3 Video monitors are used.

¥ External audio Mixer to be used to mix the three received audio signals.

¥ Speaker.

The following classroom OEM equipment is optional, but enhances the function of DVLN 3.0 at the classroom site:

¥ VSI video controller equipment

Multiple DS3 - MCC Site Hardware Requirements

The following DV45B equipment must be supplied at

each

MCC Switching Site:

¥ One DV45 shelf equipped with an MCU and up to eight DCS units, one for each remote classroom connected to the cell. For example, if 12 classrooms are connected to the cell, then 2 DV-45 shelves, one equipped with 8 DCS units and 1 MCU, and the other equipped with 4 DCS units and 1 MCU, are required.

¥ One or more DV45 shelf equipped with DVSU and DCS units. This shelf is used to carry DS3 trunk lines between the cell switching site and the classroom decoder units. As well, it may also be equipped with a DCS unit for handling communication between the MCC and the MSC

7-18




¥ At least one DS3 switch. The switch size required depends on a number of parameters including the number of classrooms connected to the cell, and the number of DS3 trunk lines connected to the cell. Other parameters also inßuence switch size to a lesser degree.

In addition, the following OEM equipment is required at each MCC site to properly run a class session:

¥ Release 3.0 requires a 486DX-33 based PC or higher with at least 4MB of RAM, using the 8MHz ISA bus. A mouse and a color VGA monitor are highly recommended. DVLN will work with DOS version 5 or higher.

Multiple DS3 - MSC Site Hardware Requirements

The following DV45B equipment must be supplied at the MSC Switching Site to run DVLN 3.0:

¥ One DV45 shelf equipped with an MCU and up to eight DCS units, one for each remote classroom connected to the central cell.

¥ At least one DV45 shelf equipped with DCS and DVSU units. The DVSU cards are used to eliminate switching hits on DS3 signals headed for the decoders in each classroom site connected to the central cell. The number of DVSU cards required will depend on the number of classroom sites in the cell as well as the number of decoders in each classroom site. One DCS card is also required per each remote cell, to be used to carry data communication between the MSC and an MCC

¥ One DS3 switch. The switch size required depends on a number of parameters including the number of classrooms connected to the cell,the number of inter cell DS3 trunk lines, and the number of intra-cell DS3 trunk lines used to carry DS3 signals to the classroom sites connected to the Central cell. Other parameters also inßuence switch size to a lesser degree.

In addition, the following OEM equipment is required at each MSC site to properly run a class session:

¥ A 486DX-33 based PC or higher with at least 4MB of RAM, using the 8MHz ISA bus. A mouse and a color VGA monitor are highly recommended. DVLN will work with DOS version 5 or higher.


7-19



Alarms

Network-wide error and event logs are provided and are accessible from the Multi-Cell System Controller. Cell-wide information is available from individual MCCÕs. Logs can be viewed on the controller screen, printed, or saved to disk for off-line processing.

Real-time network-wide monitoring of switch status, class status and classroom status is provided at the Multi-Cell System Controller.

When a class is running, DVLN network failures are reported at the teacherÕs Classroom Interface. A failure to establish communication with a controller will result in a ÔController Not RespondingÕ message to be displayed on all Mac classroom interface. Only those failures affecting the running class are reported.

Fault Conditions

DVLN 3.0 does not provide fault monitoring capabilities other than those speciÞed in this document. Separate systems/equipment should be used to monitor failures of DS3 switches, DV45B equipment and Þbre optic transmission equipment.

DVLN 3.0 will detect, report and log

network fault

s (bidirectional failures of the DVLN control network). SpeciÞc causes will not be identiÞed and should be determined from other monitoring systems. Network faults can be caused by a number of failures including:

¥ Power down of a classroom Macintosh

¥ Exiting the application program on a classroom Macintosh

¥ Removal or failure of a DV45 MCU, Coder, or Decoder

¥ An unprotected Þbre cut

¥ An unprotected transmission equipment failure

¥ A data path fault

DVLN 3.0 will also detect, report and log any DS3 switch failures.

A complete list of DVLN logs and their meaning will be included in the DVLN 3.0 NTPs.

Fault Recovery and Power Up

¥ All conÞguration information required to maintain and operate a DVLN network will be held in the Multi-Cell System Controller, and should be backed up on a regular basis. If an individual MCC resets or is powered up, all required information will be downloaded automatically.

7-20




¥ During a class session, the MCC will control and monitor all interactions. It will report the session status to each Classroom Interfaces after changes and on a periodic basis. In the event that a Classroom Interface resets or powers up, it will re-synchronize once the Þrst status report is received.

¥ In the event that a MCC resets during a class session, the class will be restarted once the schedule is downloaded (if required) from the Multi-Cell System Controller.

¥ Comprehensive error checking will be performed on all DVLN control messages.

Operating Performance

User Operating Environment

The DVLN Controller PC is normally installed close to the DS3 switch to minimize cable length.

Location of the Classroom Interface Macintosh are at the discretion of the installer. Possible locations are:

¥ At the front of the class for operation by the teacher

¥ At the back of the class for operation by a facilitator.

System Requirements - Operation

It is recommended that a regular daily or weekly period be established for DVLN network maintenance, allowing for system re-conÞguration, data backup and other periodic tasks. No other special operational requirements apply.

Man-Machine Interface

DVLN Controller PC requires a keyboard for operation. A mouse is optional but highly recommended.

The Classroom interface Macintosh requires a mouse for operation. A touch screen interface can be provided as an option and is recommended.

System Security

DVLN can be password protected. A password is entered at the teacherÕs Classroom Interface to start a class session. This feature can be disabled.

Power Requirements

Both the controller PC and the Macintosh require a 120VAC power supply.

NTPs/Software Documentation

A full set of NTPs will be provided for DVLN 3.0. In addition, User Guides will be distributed with each DVLN software pack.

Ordering Information 323-1401-151 FWP02 3.01NTP Update DV-45-R3.04 June 1997

1-1

Equipment listingThis chapter lists available DV-45 equipment. Items are classified as either standard(STD) or addition and maintenance (A&M). Standard items are current productionitems, while A&M items can be ordered for a specified period before their statuschanges to Manufacture Discontinued (MD). Both A&M and STD items can beordered using Table 1-1.

Plug-ins from the DV-45A series (the original DV-45) have been discontinued andreplaced with DV-45B (the latest version of DV-45) units. The same shelf is usedand will accept both series of units.

The DV-45B uses a different algorithm from the DV-45A so coders from one seriesmust be matched by decoders from the same series. The DV-45BQ is an option forthe DV-45B that provides superior video performance. The Data Comm Sync unitis compatible with either series. The DV-45A MCU can be upgraded to theNT2H35KA unit for compatibility with both DV-45A and DV-45B plug-ins.

1-2 Equipment listing


Table 1-1Equipment listing (DV-45B)

ITEM EQUIPMENT DESCRIPTION CPC PEC STATUS EQPG.RULE

Shelf hardware

001 DV-45 shelf assembly A0664752 NT2H50AC STD 1003 Heat deflector A0362955 NT2H51BA STD 2

Plug-in modules

100 Coder, Network Quality, -48 V A0394041 NT2H03AA STD 3104 Coder, Broadcast Quality, -48 V A0394045 NT2H03AB STD 3

108 Decoder, Network Quality, -48 V A0394043 NT2H04AA STD 3112 Decoder, Broadcast Quality, -48 V A0394046 NT2H04AB STD 3

Decoder, Network Quality with FS A0396621 NT2H04BA STD 3114 Decoder, Broadcast Quality with FS A0396622 NT2H04BB STD 3

116 DCS (Datacomm Sync) Unit A0392292 NT2H31AA STD 4

120 Maintenance control unit, -48 V dc A0398460 NT2H35KA STD 5

122 Single blank/information card A0349017 NT2H39BA STD 6123 Double blank/information card A0349016 NT2H39AA STD 6

Cables and cable accessories

200 DS3 cable (SMZ to bare end), 5 m A0331149 NT5E61DA STD 7201 DS3 cable (SMZ to bare end), 10 m A0331150 NT5E61DB STD 7202 DS3 cable (SMZ to bare end), 20 m A0331151 NT5E61DC STD 7203 DS3 cable (SMZ to bare end), 30 m A0331152 NT5E61DD STD 7204 DS3 cable (SMZ to bare end), 40 m A0331153 NT5E61DE STD 7

— continued —

Equipment listing 1-3

Ordering Information 323-1401-151 FWP02 3.01NTP Update 94-015 January 1995

Table 1-1 (continued)Equipment listing (DV-45B)


Cables and cable accessories (continued)

208 DS3 (RG-59) cable (BNC to bare end), 5 m A0364731 NT7E42AA STD 7209 DS3 (RG-59) cable (BNC to bare end), 10 m A0365949 NT7E42AB STD 7210 DS3 (RG-59) cable (BNC to bare end), 20 m A0365950 NT7E42AC STD 7211 DS3 (RG-59) cable (BNC to bare end), 30 m A0365951 NT7E42AD STD 7212 DS3 (RG-59) cable (BNC to bare end), 40 m A0365952 NT7E42AE STD 7213 DS3 (RG-59) cable (BNC to bare end), 50 m A0365953 NT7E42AF STD 7214 DS3 (RG-59) cable (BNC to bare end), 60 m A0365954 NT7E42AG STD 7215 DS3 (RG-59) cable (BNC to bare end), 75 m A0365955 NT7E42AH STD 7

216 DS3 (734) cable (SMZ to bare end), 10 m A0370772 NT5E61FA STD 7217 DS3 (734) cable (SMZ to bare end), 20 m A0370773 NT5E61FB STD 7218 DS3 (734) cable (SMZ to bare end), 40 m A0370774 NT5E61FC STD 7219 DS3 (734) cable (SMZ to bare end), 80 m A0370775 NT5E61FD STD 7220 DS3 (734) cable (SMZ to bare end), 140 m A0370777 NT5E61FE STD 7

221 DS3 (734) cable (BNC to bare end), 5 m A0351121 NT7E43AA STD 7222 DS3 (734) cable (BNC to bare end), 10 m A0370975 NT7E43AB STD 7223 DS3 (734) cable (BNC to bare end), 20 m A0370976 NT7E43AC STD 7224 DS3 (734) cable (BNC to bare end), 30 m A0370977 NT7E43AD STD 7225 DS3 (734) cable (BNC to bare end), 40 m A0370978 NT7E43AE STD 7226 DS3 (734) cable (BNC to bare end), 50 m A0370979 NT7E43AF STD 7227 DS3 (734) cable (BNC to bare end), 60 m A0370980 NT7E43AG STD 7228 DS3 (734) cable (BNC to bare end), 75 m A0370981 NT7E43AH STD 7229 DS3 (734) cable (BNC to bare end), 80 m A0373188 NT7E43AJ STD 7230 DS3 (734) cable (BNC to bare end), 140 m A0373189 NT7E43AK STD 7231 DS3 (734) cable (BNC to bare end), 100 m A0375153 NT7E43AL STD 7

232 DS3 (728) cable (BNC to bare end), 5 m A0364488 NT7E41AA STD 7233 DS3 (728) cable (BNC to bare end), 10 m A0365935 NT7E41AB STD 7234 DS3 (728) cable (BNC to bare end), 20 m A0365936 NT7E41AC STD 7235 DS3 (728) cable (BNC to bare end), 30 m A0365937 NT7E41AD STD 7236 DS3 (728) cable (BNC to bare end), 40 m A0365938 NT7E41AE STD 7237 DS3 (728) cable (BNC to bare end), 50 m A0365939 NT7E41AF STD 7238 DS3 (728) cable (BNC to bare end), 60 m A0365940 NT7E41AG STD 7239 DS3 (728) cable (BNC to bare end), 75 m A0365941 NT7E41AH STD 7240 DS3 (728) cable (BNC to bare end), 100 m A0375151 NT7E41AJ STD 7241 DS3 (728) cable (BNC to bare end), 140 m A0375152 NT7E41AK STD 7

242 DS3 (735) cable (BNC to bare end), 5 m A0408003 NT7E43BA STD 7243 DS3 (735) cable (BNC to bare end), 10 m A0408004 NT7E43BB STD 7244 DS3 (735) cable (BNC to bare end), 20 m A0408005 NT7E43BC STD 7245 DS3 (735) cable (BNC to bare end), 30 m A0408006 NT7E43BD STD 7246 DS3 (735) cable (BNC to bare end), 40 m A0408007 NT7E43BE STD 7247 DS3 (735) cable (BNC to bare end), 50 m A0408008 NT7E43BF STD 7248 DS3 (735) cable (BNC to bare end), 60 m A0408009 NT7E43BG STD 7249 DS3 (735) cable (BNC to bare end), 70 m A0408010 NT7E43BH STD 7

— continued —





Cables and cable accessories (continued)

250 RG59B/U Coaxial cable (75-ohm) R0061488 RG59B/U STD 8251 RG59B/U (SMZ) Posi-lock connector A0327194 CXB02PS010 STD 8252 RG59B/U BNC connector (straight and crimped) A0360696 CXM01P1789S75 STD 8253 NT728A Coaxial cable (75-ohm) R0061307 NT728A STD 8254 NT728A BNC connector (straight and crimped) A0360989 R142090 STD 8255 NT734A Coaxial cable (75-ohm) R0114350 R0114350 STD 8256 NT734A (SMZ) Posi-lock connector A0368132 CX12PR75CABTL734 STD 8257 NT734A BNC connector (straight and crimped) A0361621 CX01P75C734A STD 8258 NT735 Coaxial cable (75-ohm) R0115193 R0115193 STD 8259 NT735 BNC connector (straight and crimped) A0609866 CX01PS008 STD 8260 Belden 8281 broadcast video cable (75-ohm) R0114352 R0114352 STD 7261 Audio Cable IRPVC 24 AWG (Red/Yellow) R0103029 R0103029 STD 7

(600-ohm balanced)262 ABAM 6 pair 22 AWG cable R0113431 ABAM-6 STD 7263 Power cable NS5482-01, 14 AWG, 2-wire R0057172 NS5482-01 2CON14 STD 15264 Power cable TRB64 14GA stranded black R0110533 TRB64 14GA BL STD 15265 Power cable TRB64 14GA stranded red R0110338 TRB64 14GA RD STD 15

Miscellaneous items

300 Switching mode rectifier B0216758 3 J02427A-1 STD 9110 V ac / -48 V dc / 25 Amp

301 7.5 Amps fuse A0108996 NSQ4088 L13 STD 1302 Batteries with shelf assembly A0325028 NT6H36AB STD 10303 AC power cord A0377620 NPS50160-01L2 STD 11304 Adapter bracket (23 in.) for rectifier P0675459 P0675459 STD 12305 Adapter bracket (23 in.) for battery shelf P0675460 P0675460 STD 13306 BNC right-angle adapter A0361070 CX01APJ75RT STD 8307 BNC termination (75-ohm) A0367547 CX01TP500Z75 STD 3308 DVLN DCS upgrade kit A0405434 NT2H99AA STD 4309 MCU upgrade kit A0398462 NT2H99CA STD 5310 DVLN Decoder with FS upgrade kit A0620694 NT2H99DD STD 3311 DVLN MCU upgrade kit A0620692 NT2H99EA STD 5312 DVLN Decoder without FS upgrade kit A0620693 NT2H99EE STD 3313 DLT Distance Learning Terminal cabinet A0393967 NT2H55AA STD 14314 DLT Distance Learning Terminal cabinet A0393968 NT2H55AB STD 14

with FMT-6 transport module315 Maintenance Control Unit upgrade kit A0655108 NT2H99JA STD 5, 21

for TL1 support316 Right-to-use (RTU) TL1 software license A0657987 NT2H98AA STD 21

for DV-45 shelf configurations

— continued —


Equipment listing 1-5

Ordering Information 323-1401-151 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996


Documentation

400 DV-45 Drawing Package A0350649 NT2H79AA STD 16401 DV-45 NTPs A0350651 NT2H7902 STD 17402 DV-45 NTP TL1 addendum A0659863 NT2H7914 STD 22403 DVLN (Digital Video Learning Network) NTPs A0681329 NT2H65AB STD 17404 DVLN System Controller User Guide A0618330 NT2H65BB STD 17405 DVLN Classroom Controller User Guide A0618331 NT2H65CB STD 17406 FMT-6 User Guide A0389753 NT7H0162 STD 17407 FMT-6 Drawing Package (Includes User Guide) A0389754 NT7H01PH STD 17408 Nortel Supertrunk system NTPs A0641193 NT2H7910 STD 18409 Nortel Supertrunk Planning Guidelines A0641194 NT2H7911 STD 19410 Complete DV-45 and Nortel Supertrunk A0641195 NT2H7912 STD 18

documentation package411 Nortel Supertrunk Drawing Package A0641196 NT2H7913 STD 20



Ordering Information 323-1401-151 FWP02 3.01NTP Update 94-015 January 1995

2-1

Equipping rulesThis chapter contains equipping rules which can be used as guidelines for orderingthe DV-45 equipment listed in Table 1-1 of this document.

Chart 2-1Equipment ordering guideline

RuleRule description

No.

1 Order one DV-45 shelf to house up to four bidirectional codecs, or any mixture of coder,decoder and DCs units, as long as the total quantity is less than or equal to eight. Refer toFigure 2-1 for the shelf layout and to Chapter 4 for typical system configurations. DV-45Aand DV-45B plug-ins will fit in the same shelf.

The DV-45 shelf can be mounted in 483.0 mm (19 in.) or 584.0 mm (23 in.) bays,adjustable mounting brackets are provided with the shelf. A maximum of four DV-45shelves can be mounted per 7 foot bay.

2 If heat-generating equipment is mounted underneath the DV-45 shelf, order one heatdeflector, (to be mounted underneath the DV-45 shelf). If the equipment mounted above theDV-45 shelf is heat sensitive and not equipped with a heat deflector, order one additionalheat deflector, (to be mounted above the DV-45 shelf). The heat deflector, when mountedabove the DV-45, prevents dust from entering the shelf.

Each heat deflector requires two 89.0 mm (3.50 in.) mounting spaces. Adjustable mountingbrackets are provided with the heat deflector to allow mounting in either 483.0 mm (19 in.)or 589.0 mm (23 in.) bays.

Ñ continued Ñ

2-2 Equipping rules


Chart 2-1 (continued)Equipment ordering guideline


No.

3 Order DV-45B coder or decoder units up to a maximum of eight per shelf. Any of the firsteight slots will accept a coder or decoder. Select the appropriate unit based on theapplication:

The NT2H0510 is an optional daugtherboard which can be applied to NT2H03AA to obtainBQ Broadcast Quality video performance (NT2H03AB). It can be installed in the field.

The NT2H0610 is an optional daugtherboard which can be applied to NT2H04AA/AB toobtain Frame Store functionality (NT2H04BA/BB). It can be installed in the field.

All DV-45B coders are compatible with all DV-45B decoders, manufacture discontinued(MD) DV-45A units NT2H01/02 are not compatible. However the NT2H01/02 (MD) andNT2H03/04 (STD) may be used together in a network, provided that they are not requiredto be interconnected. A Broadcast Quality unit combined with a Network Quality unit willdefault to Network Quality Operation.

The DV-45B decoder unit can be equipped with a frame Store (FS) option. This option willstore two frames of video and outputs one field with proper NTSC sequence if there is aninterruption of the video signal. It is useful for masking hits that occur during switching.Order one 75 ½ BNC termination for each coder unit to terminate the video input.

The NT2H03CB, Broadcast Quality Coder with HBIF replaces the NT2H03AB. TheNT2H03CA Network Quality Coder with HBIF is offered as an enhancement to theNT2H03AA. Both the new Coders are compatible and interchangeable with the existing units.

The HBIF (Horizontal Blanking Interval Filter) is an add on board to the Coders. The HBIFuses a digital signal processing technique to remove white noise from the horizontalblanking interval of the video signal without affecting the active video portion of the signal.

The HBIF is especially useful in applications dealing with video from satellite or analogmicrowave networks. Without this filter, the video output may demonstrate chroma-flashingwhere a flickering effect is visible. The HBIF will not work on video signals which are nottime base corrected, like VCR signals.

A new firmware load, AA13 has been created to support the HBIF. This firmware load isbackwards compatible, and supports both Coders with and without HBIF.

Ñ continued Ñ

Equipping rules 2-3




No.

3 The NT2H04DA/EA decoders are required to support DVLN application. The maincont'd change between these decoders and previous decoders is the addition of on-board audio

muting and mixing capabilities. Existing decoders can be upgraded with the NT2H99DDkit for decoders with Frame Store and the NT2H99EE kit for decoders without FrameStore by changing the firmware. Equipping the network with decoders with Frame StoreNT2H04EA is strongly recommended, as these decoders will prevent picture rollfollowing DS3 switching.

4 The NT2H30 (MD) are replaced by NT2H31 (STD). The Data Comm Sync (DCS) unitprovides access for low speed data connections to the video link. The DCS unit occupiesany free coder or decoder position. Four DS-1 channels are inserted into the DS3. The unitmay be configured for DS1, RS-232 or RS-422 data. Two RS-232 or 422 data channels areavailable.

The DCS unit can be used to transmit data only in Network Quality systems, not BroadcastQuality. In a Broadcast Quality system the DCS unit can still be used to provide DS3 framealignment. By optioning the DCS for pass-thru operation it will remove DS3 hits generatedby Digital Switching without affecting the BQ channel.

The NT2H31CA is used to process data communication signals routed through the networkand is capable of processing synchronous RS-232 and RS-422 data up to 64 kbps. The newDCS has a firmware load which is required to run DVLN 3.0. Previous versions of DCSunits can be upgraded with the NT2H99AA kit by changing the firmware in the field. TheDCS must be upgraded at both ends to establish a functional datacomm channel.

5 If major or minor external relay contacts, E2A (TBOS) serial interfaces, or TL1 alarmsurveillance interfaces are required, order one maintenance control unit (MCU) per shelf.The NT2H99JA MCU firmware upgrade kit provides the EPROMS and labels to upgradean NT2H35CA or higher MCU to an NT2H35KA to support TL1 alarm messaging.

Existing MCUs can be upgraded with the NT2H99JA kit by changing the firmware in thefield.

6 For proper EMI shielding, order single and/or double blank/information cards to completelyfill the shelf. A double blank/information card is equivalent to one coder or decoder space,whereas a single blank/information card will fill one DS1 position or one monitor andcontrol unit space. Refer to Figure 2-1 for the physical layout of the shelf and units.

Ñ continued Ñ

2-4 Equipping rules




No.

7 Whenever the DV-45 is to be directly connected to NT FOTS (Fiber Optical TransportSystem), order DS3 cable assemblies, (items 200-249). Select the length as required. Fourcoaxial cable types can be used (RG59B/U, 728, 734 and 735), one end is connectorized(SMZ or BNC connector) and the other end is bare. One DS3 cable and one BNC (male)connector, as per coaxial cable type, are required per coder or decoder.

Order loose coaxial cable for connection to a Fiberworld Product (OC-12, OC-48).

Order 728 or 734 coaxial cable for a DS3 cable length up to 137 m (450 ft). Order RG-59 or735 for distances not exceeding 76m (250 ft.). When space is a factor for installation,different nominal outer diameters of coaxial cable are available for short or long distances.

Order two BNC connectors (see rule 8) for each DS3.

Order Belden 8281 broadcast video coaxial cable for all video input and output signals.Order two BNC connectors (item 254) for each video connection.

Order IRPVC24 GA audio cable (600-ohm balanced) for all audio input and output signals.

Order ABAM 6-pair cable for all DS1 and low speed data connections.

8 Order BNC (Item 254) connector for NT728A or Belden 8281 type coaxial cable asrequired. Order BNC (Item 257) connector for 734, BNC (Item 259) connector for 735 andBNC (Item 252) connector for RG-59B/U type coaxial cable as required. To reduce rearshelf cabling projection, order one right-angle adapter (Item 306) per video or DS3terminated cable on the DV-45 shelf.

9 Order one switching mode rectifier when no -48 V dc source is available. This rectifier hasa capacity of 25 amperes at -48 V dc. It can be operated from a 110 V ac or a 220 V acsource.

Ñ continued Ñ

Coaxial Cable Nominal Outer Distance to DSX-3 Panel for LBO settingType (PEC) Diameter IN (short) OUT (long)

735 (NT7E43BX) 0.130 in. 0 - 50 m (0 - 164 ft) 50 - 76 m (164 - 250 ft)RG-59 (NT7E42AX) 0.375 in. 0 - 50 m (0 - 164 ft) 50 - 76 m (164 - 250 ft)

728 (NT7E41AX) 0.300 in. 0 - 68 m (0 - 225 ft) 68 - 137 m (225 - 450 ft)734 (NT7E43AX) 0.236 in. 0 - 68 m (0 - 225 ft) 68 - 137 m (225 - 450 ft)


Equipping rules 2-5



No.

10 Order one shelf with a set of batteries when a 50 ampere-hour battery backup is required.The power consumption for a fully equipped DV-45 shelf is 265 watts maximum (or 3.4amperes at -48 V dc).

11 Order one ac power cord, 2.7 m (9.00 ft) long, when the switching mode rectifier is to befed from a standard ac outlet.

12 Order one 584.0 mm (23.00 in.) rectifier adapter bracket whenever the rectifier shelf is to bemounted in a 584.0 mm (23.00 in.) wide bay, with 44.0 mm (1.75 in.) per mounting space.

13 Order one 44.0 mm (23.00 in.) battery shelf adapter bracket whenever the battery shelf is tobe mounted in a 44.0 mm (23.00 in.) wide bay, with 44.0 mm (1.75 in.) per mounting space.

14 The Distance Learning Terminal (DLT) is a customer premises cabinet containing oneDV-45 shelf (NT2H50AA), a DMI-F45 optical interface unit and a power rectifier foroperation from 110 volts ac (NT2H55BA). One Drop/Insert video configuration can beequipped consisting of one coder, one decoder, one DCS unit, and one MCU.

15 Order power cable as required (specify lengths). Use no. 14, NS5482-01 type cable forinter-bay cabling. Use TRB64 14-gauge type cable for intra-bay cabling. Each DV-45 shelfcan accept two paired feeders for protection (RETA, BATA) and (RETB, BATB). However,one paired feeder is sufficient to power the shelf.

16 Order one drawing package for each location to operate the DV-45 equipment. Eachdrawing package contains the following functional drawings: associated assembly drawing(AD), intraconnect schematic (IS), stock list (SL).

17 Order one set of Northern Telecom Publications (NTPs) for each site using the DV-45equipment. NTPs and User Guides for DVLN application are listed for additionalinformation.

18 Order one set of DV-45 NTPs and one set of Nortel Supertrunk system NTPs for eachNortel Supertrunk headend site. The complete DV-45 and Nortel Supertrunk documentationpackage can be ordered using PEC NT2H7912.

19 The Nortel Supertrunk Planning Guidelines, 324-2301-150, can be ordered separately usingPEC NT2H7911.

20 Order one drawing package for each Nortel Supertrunk headend site. Each drawing packagecontains the following functional drawings: associated assembly drawing (AD),intraconnect schematic (IS), stock list (SL).

2-6 Equipping rules




No.

21 Order one right-to-use (RTU) TL1 software license (PEC NT2H98AA) for each DV-45shelf configuration supporting TL1 alarm surveillance.

22 Order one DV-45 NTP TL1 addendum for each DV-45 site supporting TL1 alarmsurveillance.


Equipping rules 2-7


Shelf layout

Unused MCU

CodecNo. 1

Coder Decoder Coder Decoder Coder Decoder Coder Decoder

DoubleBlank/InfoCard

SingleBlank/InfoCard

CodecNo. 2

CodecNo. 3

CodecNo. 4

482.60 mm(19 in.)

311.15 mm(12.25 in.)

DV-45 Shelf

Heat Deflector

Note 1:

Note 2:

Note 3:

All coder and decoder slots can be filled with coder, decoder or Data Comm Sync (DCS) units.

All unequipped slots must be filled with blank or information cards to meet EMI specifications.

One heat deflector must be mounted under each DV-45 shelf when external fans are not used.

Unused

88.90 mm(3.5 in.)

2-8 Equipping rules


Ordering Information 323-1401-151 FWP02 3.01

4-1

Typical System ConfigurationsFigure 4-1 shows some typical configurations of DV-45 video codec equipment.Other configurations are possible.

Drop/insert ConfigurationBy equipping the plug-ins as shown the DV-45 provides a bidirectional videochannel with data services. The MCU provides local and remote alarms. The farend can consist of another Drop/Insert configuration or a DCS unit at a digitalswitching site.

Dual Drop/InsertBy equipping the units as shown the DV-45 provides two bidirectional videochannels with data services. The two channels may connect to different remotesites. Local and remote alarms are provided by the MCU.

Three Bidirectional Video channelsThree bidirectional video channels are shown. The channels may connect todifferent remote sites. Local and remote alarms are provided by the MCU.

Four Bidirectional Video channelsThe shelf is shown fully equipped with four bi-directional video channels. Detailsas with three bidirectional channels.

Eight coder unitsFully equipped for unidirectional transmission of eight video channels. Localalarms only are available from the MCU.

Eight Decoder unitsFully equipped for unidirectional reception of eight video channels. Local andremote alarms are available from the MCU. Remote alarms are organized byreceiving decoder unit.

Typical System Configurations 4-2


Figure 4-1 (Sheet 1 of 2) (FW-0292)

Typical system configurations

Two bidirectional codecs (coders and decoders) each equipped with a DCS unit,and one maintenance control unit (MCU).Plug-ins must be equipped as shown forremote alarms.Equipment required:1- NT2H50AC DV-45 shelf2- NT2H03xx coder2- NT2H04xx decoder2- NT2H31CA DCS unit1- NT2H35KA MCU2- NT2H39AA double blank/information2- NT2H39BA single blank/information2- 75W BNC (male) terminationOptions:1- NT2H51BA heat deflector

One bidirectional codec (coder and decoder)equipped with a Data Comm Sync (DCS)unit, and one maintenance control unit (MCU).Plug-ins must be equipped as shown forremote alarms.Equipment required:1- NT2H50AC DV-45 shelf1- NT2H03xx coder1- NT2H04xx decoder1- NT2H31CA DCS unit1- NT2H35KA MCU5- NT2H39AA double blank/information2- NT2H39BA single bank/information1- 75W BNC (male) terminationOptions:1- NT2H51BA heat deflector

Three bidirectional codecs (coders and decoders)with no data interface, and one maintenancecontrol unit (MCU).Equipment required:1- NT2H50AC DV-45 shelf3- NT2H03xx coder3- NT2H04xx decoder1- NT2H35KA MCU1- NT2H08xx OC32- NT2H39BA single blank/information6- 75W BNC (male) terminationOptions:1- NT2H51BA heat deflector

Drop/Insert Configuration

Drop/Insert Codecs

Three Bidirectional Video Channels

CODER

DECODER

DCS

UNIT

SINGLE

BLANK

MCU

DOUBLE

BLANK

DOUBLE

BLANK

DOUBLE

BLANK

DOUBLE

BLANK

DOUBLE

BLANK

CODER

DECODER

SINGLE

BLANK

MCU

DOUBLE

BLANK

DOUBLE

BLANK

CODER

DECODER

0 1 2 3 4 5 6 7 8 9 10

0 1 2 3 4 5 6 7 8 9 10

0 1 2 3 4 5 6 7 8 9 10

SINGLE

BLANK

DCS

UNIT

SINGLE

BLANK

DCS

UNIT

CODER

DECODER

CODER

MCU

DECODER

OC-3

CODER

DECODER

SINGLE

BLANK

SINGLE

BLANK

Typical System Configurations 4-3

Ordering Information 323-1401-151 FWP02 3.01NTP Update DV-45-R3.04 June 1997

Figure 4-1 (Sheet 2 of 2) (FW-0293)

Typical system configurations

Four bidirectional codecs (coders and decoders),and one maintenance control unit (MCU).

Equipment required:1- NT2H50AC DV-45 shelf4- NT2H03xx coder4- NT2H04xx decoder1- NT2H35KA MCU2- NT2H39BA single blank/information8- 75W BNC (male) termination

Options:1- NT2H51BA heat deflector

Four bidirectional Video Channels

CODER

DECODER

CODER

SINGLE

BLANK

MCU

DECODER

CODER

DECODER

CODER

DECODER

0 1 2 3 4 5 6 7 8 9 10

SINGLE

BLANK

Note: These configurations are given as examples. The flexibility of the DV-45allows for many more configurations.

Eight coders and onemaintenance control unit (MCU).

Equipment required:1- NT2H50AC DV-45 shelf8- NT2H03xx coder1- NT2H35KA MCU2- NT2H39BA single blank/information8- 75W BNC (male) termination


Eight Coder units

CODER

CODER

CODER

MCU

CODER

CODER

CODER

CODER

CODER

0 1 2 3 4 5 6 7 8 9 10

SINGLE

BLANK

SINGLE

BLANK

SINGLE

BLANK

SINGLE

BLANK

Eight decoders and onemaintenance control unit (MCU).

Equipment required:1- NT2H50AC DV-45 shelf8- NT2H04xx decoder (see note)1- NT2H35KA MCU2- NT2H39BA single blank/information8- 75W BNC (male) termination


Eight Decoder units

DECODER

DECODER

DECODER

MCU

DECODER

DECODER

DECODER

DECODER

DECODER

0 1 2 3 4 5 6 7 8 9 10

4-4 Typical System Configurations


Technical Specifications 323-1401-180 FWP02 3.01

1-1

General specificationsThis chapter contains the general specifications for the DV-45. Function, capacityand safety guidelines are briefly described.

GeneralThe DV-45 converts a standard National Television Standards Committee (NTSC)composite video signal into a 44.736 Mb/s DS3 digital signal for use in the NorthAmerican telephone system. Up to four audio channels are included with the videosignal in the DS3.

Coding and decoding are performed by separate coder and decoder units. Theoriginal DV-45A has been replaced by the new, superior DV-45B and DV-45BQSeries.. The DV-45 shelf can contain eight of these modules.

ConfigurationsAll eight coder/decoder slots of the DV-45 shelf may be equipped with coder unitsto transmit video and audio, with decoders to receive video and audio or with DCSunits for data interfaces at DS3.

A one-way video link (using a coder to transmit and a decoder at the receive end) isa unidirectional configuration.

Bidirectional codec pairs are configured with video traffic to and from anotherlocation, the coder and decoder are equipped in adjacent slots. The bidirectionalconfiguration provides the maintenance loopback feature and remote alarminformation.

A Drop/Insert configuration provides the features of a bidirectional configurationwith DCS units. The units must be equipped according to rule described inOrdering Information, 323-1401-151.

Some types of DV-45A coder and decoder modules are for video transmission onlyand do not have audio circuitry. To determine the audio capacity of a module, referto Signal Flow and Circuit Pack description,323-1401-101. All DV-45B coder anddecoder units are equipped for 4 audio channels.

1-2 General specifications


Low speed data traffic can be transmitted as part of the coded video signal. DS1,RS-232 and RS422 interfaces are supported. This requires an auxiliary Data CommSync unit to be equipped and the coder to be optioned for 6-bit differential pulsecode modulation (DPCM).

Alarm indicationsEach unit faceplate has LED indicators to provide module alarms and status. Theoptional maintenance control unit (MCU) provides standard C-type relay outputs(normally open/normally closed) and an E2A TBOS serial alarm interface. Fordetails on DV-45 alarms, refer to Alarms and surveillance, 323-1401-102.

Safety standardsDV-45 complies with the applicable performance requirements, labelingrequirements, and informational requirements outlined in the following documents:

• Canadian Standards Association standard "CSA 22.2 #7" (EquipmentElectrically Connected to a Telecommunication Network).

• Underwriter Laboratories standard "UL1459" (Telephone Equipment).

• Underwriter Laboratories standard "UL478" (Standard for Safety –Information Processing and Business Equipment).

• Part 1910 – Occupational Safety and Health Standards (Title 29 – Labor,Chapter XVII-OSHA, Dept of Labor).

• Department of Health, Education and Welfare Bureau of Radiological Health(BRH), 21 CRF 1040.10.

CompatibilityDV-45B and DV-45A modules use incompatible algorithms. DV-45B decoders willonly accept signals from DV-45B coders. DV-45A coders are required with DV-45Adecoders. The DV-45 shelf remains unchanged and can contain a mix of units.


Technical Specifications 323-1401-180 FWP01 3.01NTP Update DV-45-R3.04 June 1997

4-1

Power specificationsAll DV-45 units (both DV-45B and DV-45A) operate using a -48 V dc officesupply. The NT2H50AA shelf was designed with a maximum current capacity of7.5 A, the NT2H50AC shelf is designed with a maximum current of 15 A.

Battery voltage requirements

Power distributionShelf and circuit pack power is provided by means of redundant feeds. Failure dueto one open power feed or a short circuit to ground does not affect the system.

The DV-45 shelf has fuses for the A and B office batteries located at the rear of theshelf. All circuit packs are individually fused.

Grounding and isolationThe DV-45 complies with the isolated ground zone (IGZ) requirements ofspecification TA-EOP-000295. To comply with CSA safety requirements the shelfmust be grounded before power is supplied. Installing the shelf in a grounded bay isnormal installation practice, cabinets may require additional ground connection.

Range -42 to -56 V dc

Transient overload voltage to -60 V dc for up to 0.5 s

Battery step change 5 V

Battery amplitude slew rate 1 V/ms


Power specifications 4-2

Power dissipationAt the nominal battery voltage, the maximum power dissipation of each DV-45circuit pack will be as follows. As a worst case, a shelf filled with DV-45BQ coderswill consume 265 Watts.

Electromagnetic compatibilityEmission

RadiatedThe system, with blank/information units in the unused slots, meets therequirements of FCC Regulations Part 15 Subpart J; Class A (commercial andindustrial) limits, in its reasonable maximum worst-case configuration and Class Blimits (residential). DV-45 equipment also meets the Bellcore TR-EOP-000063 and DOC EMCAB-1requirements.

In addition, DV-45 meets both the Broadband and Narrowband Emissions of BellCanada DS-8465.

ConductedConducted emissions onto -48 V battery leads meet the requirements set out in BellCanada DS-8465 for Broadband and Narrowband Emissions.

SusceptibilityThe system is immune to the following environments:

• Narrowband conducted interference on signal leads, DS-8465, section 4.1.4.

• Narrowband conducted interference on -48 V power leads, DS8465, up to2 V RMS, both in differential and in common mode (10 kHz to 30 MHz).

• Narrowband radiated electric field, DS-8465, section 4.1.6, up to 5 V/m(10 kHz to 30 MHz), 10 V/m (1 to 10 GHz).

Circuit pack Maximum power

DV-45B Coder Unit 25 W

DV-45BQ Coder Unit 32 W

DV-45B/DV-45BQ Decoder Unit 19 W

DV-45B/DV-45BQ Decoder Unit with FS 20 W

Data Comm Sync Unit 13 W

DV-45A Coder Unit 18 W

DV-45A Decoder Unit 18 W

MCU Unit 10 W


7-1

Digital interface specificationsThe DV-45 interfaces at the standard DS3 and DS1 digital rates. These signals arethe same for DV-45B and DV-45A units and conform to all requirements for DS3and DS1. The DCS unit provides RS-232 and RS-422 data interfaces.

DS3 interfaceThe output of the coder module and the input to the decoder module is a standardDS3 with standard framing and parity bits. The interface has the followingcharacteristics.

Interconnect specifications

Pulse characteristics

The coder unit has a variable line build out (LBO) setting to accommodatecross-connect distances up to 137 m (450 ft) for NT-728A cable or 76 m (250 ft) forRG-59. The DS3 monitor output of the coder has a separate LBO and may be usedas a second DS3 source.

There is no LBO for the decoder, levels and pulse shape are accommodated for upto 137 m (450 ft) from cross-connect (NT-728A). The DS3 monitor output of thedecoder is provided by a splitter on the decoder board and is 3 dB down from theconnector input.

Shape As defined in Fig. 7-1

Amplitude 0.36 to 0.85 V peak, scaled to fit the template in Fig. 7-1.

Power level a) In a 3-kHz band, centered at 22.368 MHz, the power (for all ones level is between -1.8 and + 5.7 dBm.transmitted pattern

b) In a 3-kHz band, centered at 44.736 MHz: at least20-dB below the level in the 3-kHz band centered at22.368MHz.

Line rate 44.736 Mb/s ± 20 ppm

Line code Bipolar with B3ZS

Test load 75 ohms ± 5%, resistive

7-2 Digital interface specifications



DSX-3 isolated pulse shape

NormalizedAmplitude

DSX-3 Pulse Template Boundaries (3% tolerance margin)

TimeUnit Intervals

MaximumCurve

T -0.68

-0.68 T 0.36

0.36 T

0.5 1 + sin (1+ ) + 0.03

0.05 + 0.407e- 1.84 (T - 0.36)

£

£

£ £ [ ]T0.342

p

Curve

MinimumCurve

T -0.36

-0.36 T 0.28

0.28 T 0.11 e -0.03-3.42 (T - 0.3)

-0.03£

£ £

£

][0.5 1 + sin (1+ ) -0.03p2

T0.18

0.03

Am

plitu

de

Time, in nanoseconds

-40.0 -30.0 -20.0 -10.0 0 10.0 20.0 30.0 40.0 ns

0.4

0.3

0.2

0.1

0

-0.1

-0.2

-0.3

-0.4

Volts

Digital interface specifications 7-3


DS1 interfaceUp to four DS1s may be combined into the transmitted DS3. This requires 6-bitDPCM operation and a Data Comm Sync (DCS) unit at the transmit and receiveends. Individual LBOs allow up to 200 m (655 ft) of NT ABAM cable or equivalentto cross-connect. DV-45B units have an option for digital audio; the analog audiocircuits are bypassed and a single DS1 channel provided.

Interconnect specifications

Pulse characteristics

DS3 and DS1 Jitter requirementsInput jitter toleranceThe jitter tolerance of the DV-45 is in accordance with AT&T PUB 43806 and BellCore TA-TSY-000038.

Jitter transfer functionThe jitter transfer function of the DV-45 is in accordance with TA-TSY-000009.

Jitter generationThe maximum output jitter of the DV-45 is in accordance with ANSI T1.102.Variations below 10 Hz are excluded from the jitter definition.

Shape As defined in Figure 7-2

Amplitude 3 V (typical) measured at the center of the pulse and may be scaled by a constant factor to fit the template.

Power level a) In a 3-kHz band, centered at 772 kHz, the power level (for all ones is between 12.6 and 17.9 dBm.transmitted pattern

b) In a 3-kHz band, centered at 1544 kHz, the power is at least 29 dB below the power level in the 3 kHz bandcentered at 772 kHz.

Imbalance Less than 0.5 dB difference between the total power of the positive and negative pulses.

Line rate 1.544 Mb/s ± 130 ppm

Line code B8ZS or AMI

Test load 100 ohms ± 5%, resistive




DSX-1 isolated outgoing pulse shape

Time, in Unit Intervals

Normalized Amplitude

-0.77 -0.39 -0.27 -0.27 -0.12 0.0 0.27 0.35 0.93 1.16

0.05 0.05 0.8 1.15 1.15 1.05 1.05 -0.07 0.05 0.05

MINIMUM CURVE


Normalized Amplitude

-0.77 -0.23 -0.23 -0.15 0.0 0.15 0.23 0.23 0.46 0.66

-0.05 -0.05 0.5 0.95 0.95 0.9 0.5 -0.45 -0.45 -0.2

1.160.93

-0.05 -0.05

1.0

0.5

0.0

-0.5


Nor

mal

ized

Am

plitu

de

1.5

-1.0

0.50.0-0.5-1.0 1.0 1.5

MaximumCurve

MinimumCurve

DSX-1 PULSE TEMPLATE CORNER POINTS

MAXIMUM CURVE

RS-232/RS-422 low speed data interfacesThe Data Comm Sync (DCS) unit allows insertion and extraction of two low speeddata interfaces into the DS3 along with the Video and Audio traffic. Asynchronousand HDLC protocol are supported with RS-232 and RS-422 electrical interfaces,DIP switches on the DCS module select the data channel interface type, speed, andprotocol.

Asynchronous DataDIP switches allow selection of the following asynchronous parameters:

Rates: 1200 bps Protocol: 7/8 bit data2400 bps Even/Odd/Ignore parity9600 bps 1/2 stop bits19.2 Kbps38.4 Kbps

HDLC Formatted DataDIP switches allow selection of the following HDLC parameters:

Rates: 2400 bps Protocol: Internal/External Clocking9600 bps Transmit Flags/Idles19.2 kbps 16/32 bit CRC38.4 kbps NRZ/NRZI Encoding56 kbps64 kbps128 kbps256 kbps

Electrical Interfaces

TL1 alarm surveillance interfaceEvery DV-45 shelf equipped with the NT2H35KA MCU has its own DV-45 TL1alarm surveillance interface, and is considered to be a TL1-manageable entitywithin the network.

Access to the DV-45 TL1 alarm surveillance interface is provided through the RS-232 DB25 ports located on the DV-45 shelf backplane. The RS-232 portssupport the asynchronous transfer of ASCII characters. By default they areconfigured for 8 data bits, no parity, and 1 stop bit (8N1) at 19,200 baud. Serial RS-232C or RS-232D links are supported for both local and remotecommunications with either a computer or standard ASCII terminal.

RS-232 Unbalanced Tx and Rx, maximum cabling distance 50 feet at19.2 Kbps or 20 feet at 38.4 Kbps. External clock input fromterminal equipment, output from DCS unit selectable.

RS-422 Balanced interface Tx and Rx, maximum distance 50 feet.Balanced clockleads, external input from terminal equipment oroutput from DCS unit selectable.

Digital interface specifications 7-5

Technical Specifications 323-1401-180 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996




Digital Video CodecDV-45Technical Specifications


Installation 323-1401-201 FWP02 3.01

iii

ContentsAbout this document vAudience viiOrganization viiRequired tools and materials viii_______________________________________________________________________________________________________

Observing safety guidelines 1-1Circuit pack care 1-1

Handling circuit packs 1-2Storing circuit packs 1-2Installing and replacing circuit packs 1-2

_______________________________________________________________________________________________________

Install a DV-45 shelf in a bay 2-1

List of procedures Proc. 2-1 Install a DV-45 shelf in a 482.6 mm (19.00 in.) bay,

protruding 2-2Proc. 2-2 Install a DV-45 shelf in a 584.2 mm (23.00 in.) bay,

protruding 2-4 Proc. 2-3 Install a DV-45 shelf in a 482.6 mm (19.00 in.) bay, flush

mounting 2-6Proc. 2-4 Install a DV-45 heat deflector above a shelf 2-8Proc. 2-5 Connect -48 V power 2-10_______________________________________________________________________________________________________

Install the DV-45 plug-in modules 3-1

List of proceduresProc. 3-1 Install the DV-45 modules 3-2_______________________________________________________________________________________________________

Connect the video coder and decoder interfaces 4-1

List of proceduresProc. 4-1 Connect a video coder unit 4-2Proc. 4-2 Connect a video decoder unit 4-4_______________________________________________________________________________________________________

iv Contents


Connect the Data Comm Sync (DCS) Unit 5-1

List of proceduresProc. 5-1 Connect the Data Comm Sync (DCS) unit to coder and

decoder units 5-2Proc. 5-2 Connect the Data Comm Sync (DCS) unit to a DS3 switch 5-4Proc. 5-3 Connect the DS1 interfaces 5-6Proc. 5-4 Connect RS-232 interfaces 5-7Proc. 5-5 Connect RS-422 interfaces 5-8_______________________________________________________________________________________________________

Connect the auxiliary DS1 interface unit (NT2H30) 6-1

List of proceduresProc. 6-1 Connect the auxiliary DS1 interface unit (NT2H30) 6-2_______________________________________________________________________________________________________

Connecting the MCU option 7-1

List of proceduresProc. 7-1 Connect the office alarms and telemetry 7-3Proc. 7-2 Connect the DV-45 TL1 alarm interface 7-5_______________________________________________________________________________________________________

Install Time Base Corrector (TBC) 8-1

List of proceduresProc. 8-1 Install Time Base Corrector (TBC) 8-2_______________________________________________________________________________________________________

Upgrade DV-45 MCU firmware 9-1

List of proceduresProc. 9-1 Install DV-45 MCU firmware 9-2_______________________________________________________________________________________________________

FiguresFigure 2-1 Installing a DV-45 shelf and heat deflector in a 482.6 mm

(19.00 in.) rack, protruding 2-3Figure 2-2 Installing a DV-45 shelf and heat deflector in a 584.2 mm

(23.00 in.) rack, protruding 2-5Figure 2-3 Installing a DV-45 shelf and heat deflector in a 482.6 mm

(19.00 in.) rack, flush mounting 2-7Figure 2-4 Installing a DV-45 heat deflector above a shelf 2-9Figure 2-5 Connect -48 V power 2-11Figure 3-1 DV-45 Shelf NT2H50AC, front and rear views 3-3Figure 3-2 Installing modules in the DV-45 shelf 3-4Figure 4-1 DV-45B and DV-45A video coder connections (NT2H03 and

NT2H01) 4-3Figure 4-2 DV-45B and DV-45A video decoder connections (NT2H04 and

NT2H02) 4-5Figure 5-1 Data Comm Sync connections to Coder/Decoder units 5-3Figure 5-2 Data Comm Sync connections to a DS3 switch 5-5Figure 5-3 Data interface connections to the DCS unit (Mode 0) 5-9Figure 5-4 Data interface connections to the DCS unit (Mode 1) 5-10

Figure 5-5 Data interface connections to the DCS unit (Mode 2) 5-11Figure 5-6 Data interface connections to the DCS unit (Mode 3) 5-12Figure 5-7 Data interface connections to the DCS unit (Mode 4) 5-13Figure 5-8 Data interface connections to the DCS unit (Mode 5) 5-14Figure 6-1 Auxiliary DS1 interface connections 6-3Figure 7-1 Connect the office alarms and telemetry 7-2Figure 8-1 Time Base Corrector Video connections 8-3Figure 9-1 Maintenance Control Unit firmware location 9-5

Contents v

Installation 323-1401-201 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996

vi Contents


Install the DV-45 plug-in modules 3-3

Installation 323-1401-201 FWP02 3.01NTP Update DV-45-R3.04 June 1997

Figure 3-1 FW-1487

DV-45 Shelf NT2H50AC, front and rear views

Position # 7 6 5 4 3 2 1 0

Rear view

Position # 0 1 2 3 4 5 6 7 8 9 10

Front view

CodecNo. 1

CodecNo. 2

CodecNo. 3

CodecNo. 4

DS1units unused

MCU

Coder Decoder Coder Decoder Coder Decoder Coder Decoder MCU

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR




PORT 1

PORT 2

RS-232

BAT A

BAT B


A B

POWER

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 2 CODEC 1


MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

DECODER/CODER CODER/DECODER DECODER/CODER

CODEC 4 CODEC 3

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

ALARMS

AUXILIARY

IN OUT


3-4 Install the DV-45 plug-in modules

Figure 3-2 FW-0477

Installing modules in the DV-45 shelf

ElectrostaticDischarge Jack

Locking Bar

01

2

45

67

89

10

DV-45 Installation 323-1401-201 FWP02 3.01

Revised for DV-45 FWP02 3.02 Addendum June 1996

Connecting the MCU option 1-

This chapter describes the method of connecting the maintenance control unit (MCU) option.

List of procedures

7-1 Connecting the office alarms and telemetry 7-3

7-2 Connecting the DV-45 TL1 alarm interface 7-5

7-1


Connecting the MCU option



Figure 7-1Connect the ofÞce alarms and telemetry

FW-0301.2

(FW-301.2)

ALARMS

MON1MON2NOCNCNOCNC

EXT ACOBAT RETNO

CNCNOCNC

MAJVISMAJAUD

MINVISMINAUD

T+T-R+R-T+T-R+R-12345678

E2A1E2A2

OWJACK

PORT-1

PORT-2

RS-232

Female DB25connectors

7-2




Procedure 7-2

Connecting the DV-45 TL1 alarm interface

This procedure outlines how to connect the TL1 RS-232 DB25 ports on the DV-45 shelf backplane (Figure 7-1) to the data communications interface of a TL1 operations system (OS) using straight-through RS-232 cable. The DV-45 DB25 ports can be used in combination for TL1 alarms surveillance and are conÞgured for use through the NT2H35KA MCU option settings (see Chapter 2, ÒSelect options for the NT2H35KA MCU moduleÓ, in

Option Settings and Site Testing Procedures

, 323-1401-220).

Ensure that all engineering, provisioning, and installation requirements are met for the TL1 OS equipment before connecting it to DV-45 TL1 alarm surveillance interfaces. This is a customer responsibility that can be performed by the original equipment manufacturer (OEM) as arranged by customers, or by customers themselves.

To discuss engineering considerations for TL1 OS equipment, contact your next level of support or the OEM support group. Also refer to the vendor documentation accompanying OEM TL1 OS equipment. The vendor documentation provides information on safety precautions and handling, as well as detailed instructions on installing, conÞguring, and connecting the equipment.

Familiarity with Chapter 5, ÒTL1 alarm surveillance interfaceÓ, in Digital Video Codec DV-45

Alarms and Surveillance

, 323-1401-102, is assumed.

Note 1:

A separate point-to-point RS-232 link is required for each DV-45 shelf.

Note 2:

TL1 Managed Object Agent (MOA) is an optional DV-45 TL1 alarm display software application from Northern Telecom. It enables network operators to remotely monitor TL1 alarms on DV-45 network elements (NEs) using OEM TL1 OS equipment. For more information, see

TL1 MOA User Guide

, 323-4041-050, PEC NTRT66AG.

ÑcontinuedÑ

7-5




Procedure 7-2 (continued)


The DV-45 TL1 RS-232 DB25 ports support the following standard RS-232 asynchronous signals for data ßow control:

¥ Transmit Data (TxD)

¥ Receive Data (RxD)

¥ Data Terminal Ready (DTR)

¥ Clear To Send (CTS)

¥ Data Set Ready (DSR)

¥ Request To Send (RTS)

¥ Data Carrier Detect (DCD)

The RS-232 ports support the asynchronous transfer of ASCII characters. By default they are conÞgured for 8 data bits, no parity, and 1 stop bit (8N1) at 19,200 baud. Serial RS-232C or RS-232D links are supported for both local and remote communications with either a computer or standard ASCII terminal.

Note:

Character echo is disabled to support a machine-to-machine interface. To use the DV-45 TL1 surveillance interface locally, it is recommended that the user enable the Local Echo option on the connected terminal equipment.

Requirements

Tools

wire cutterswire strippersconnector pin-crimping toollong-nose pliersßat-blade screwdriverPhillips screwdriver set

Materials

DB25 male connectors and adapters straight-through RS-232 cablecable ties (optional)null modem (VT-100 terminal only)

ÑcontinuedÑ

7-6






Action

Step Action

1

Identify which RS-232 TL1 DB25 port on the DV-45 shelf backplane is being used, that is, either port 1 or port 2 (Figure 7-1).

2

Identify cable dressing and connector requirements (Table 7-2) for both the originating (DV-45 shelf) and terminating (TL1 OS data communications interface) ends of the RS-232 cable.

Note 1:

Port requirements at the TL1 OS data communications interface may necessitate the use of DB25 male adapters at either the originating end, terminating end, or both ends of the RS-232 cable. To discuss connector and adapter considerations for TL1 OS equipment, contact your next level of support or the OEM support group. Also refer to the vendor documentation accompanying OEM TL1 OS equipment.

Note 2:

If you are directly connecting a VT-100 terminal to the DV-45 DB25 port identiÞed in Step 1, connect it through a null modem using straight-through RS-232 cable equipped with DB25 connectors at each end. If the VT-100 terminal is equipped with a DB9 port, then a DB9 to DB25 adapter is also required.

3

Cut the RS-232 cable to the appropriate length (Table 7-1). Allow extra length for a margin of error.

4

Identify the two ends of the RS-232 cable for the originating end (DV-45 shelf), and the terminating end (TL1 OS data communications interface).

5

At the originating end of the RS-232 cable, install the connector identiÞed in Step 2 according to standard procedure. Connect the cable to the DV-45 DB25 port identiÞed in Step 1, using an adapter if required, and secure the connector.

6

Route and dress the cable from the DV-45 shelf to the TL1 OS data communications interface.

7

At the terminating end of the RS-232 cable, install the connector identiÞed in Step 2 according to standard procedure. Connect the cable to the TL1 OS data communications interface port, using an adapter if required, and secure the connector.

8

Perform Þnal dressing and secure the cable.

9

See Chapter 8, ÒMCU testsÓ, in

Option Settings and Site Testing Procedures

, 323-1401-220, to verify the proper operation of the DV-45 TL1 alarm interface.

ÑcontinuedÑ

7-7






Table 7-1RS-232 port pin and signal assignments for RJ45 and DB25 connectors

RJ45 pin Signal Direction DB25 pin

1 RTS OUT 5

2 DTR OUT 8 and 6

3 TxD OUT 3

4 DCD IN 20

5 RxD IN 2

6 GND GND 7

7 DSR IN 20

8 CTS IN 4

Table 7-2Maximum recommended lengths for RS-232 cable links

Line speed Cable length

50 to 19.2 kb/s 75 m (250 ft)

38.4 kb/s 60 m (200 ft)

57.6 kb/s 30 m (100 ft)

115.2 kb/s 15 m (50 ft)

7-8


9-1

Upgrade DV-45 MCU firmwareThe maintenance control unit (MCU) circuit pack contains firmware on twoEPROM chips. To upgrade this firmware, the existing EPROM chips are removedfrom the MCU, and replaced with those containing the new firmware.

Procedure 9-1 describes how to install the NT2H35KA firmware into theNT2H35CA (or higher) MCU. The NT2H35KA firmware supports TL1 alarmmessaging, and is compatible with all DV-45 circuit packs.

All NT2H35CA (or higher) MCUs can be upgraded in the field with theNT2H99JA MCU firmware upgrade kit to support TL1 alarm messaging.

Note: Before reinstalling the module into the shelf, proper selection of circuitpack switch option settings should be completed (see Option settings and sitetesting procedures, 323-1401-220).

List of procedures

9-1 Install DV-45 MCU firmware 9-2

9-2 Upgrade DV-45 MCU firmware


Procedure 9-1Install DV-45 MCU firmware______________________________________________________________________________________________________________________________

Purpose: This procedure details the steps required to install the NT2H35KAfirmware into the NT2H35CA (or higher) MCU.

Note: Circuit pack options are different for the NT2H35CA (or higher) MCUand the NT2H35KA MCU. Consult Option Settings and Site TestingProcedures, 323-1401-220.

MaterialNT2H35CA (or higher) MCU moduleNT2H99JA MCU firmware upgrade kit

Toolsantistatic braceletantistatic work surfacesmall, flat-bladed screwdriverintegrated circuit (IC) chip extractor (optional)IC chip inserter (optional)

_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

1 Observe the antistatic precautions as described in Chapter 1. Attach theantistatic bracelet to the ground or use an antistatic mat.

2 Locate the MCU module in the DV-45 shelf, position 10.

3 Verify that there are no Unit Fail LEDs lit at the site of the MCU upgrade.Any unit failure prior to the upgrade should be investigated and corrected.

4 Identify the release number of the MCU to be upgraded.

5 Remove the locking bar (see Figure 3-2, "Installing modules in the DV-45shelf").

6 Remove the MCU circuit pack from the shelf.

7 Place the MCU circuit pack onto the antistatic work surface. Using a chipextractor, or a small, flat-bladed crewdriver, carefully remove the U2 and U3EPROM chips from their sockets (see Figure 9-1 for chip location). Returnthese EPROM chips to Northern Telecom.

Ñ continued Ñ

8 Install the new U2 EPROM chip provided in the upgrade kit as follows:

a. Insert the EPROM chip into the IC chip inserter (optional).

b. Hold the EPROM chip above the socket and orient it so that the notch in the chip aligns with the notch in the socket. Be careful not to bend any of the pins on the EPROM chip.

c. One side at a time, align the pin bottoms of the EPROM chip with the corresponding holes in the socket. Be careful not to bend any of the pins on the EPROM chip.

d. With the pins on the EPROM chip well aligned with their corresponding socket holes, push the EPROM chip down until it is fully seated. This usually requires a strong push with even pressure across the chip. If any pins should bend at this point, remove the EPROM chip from the socket and replace it with a new one, or long- term reliability may be sacrificed.

9 Repeat Step 8 for the new U3 EPROM chip provided in the upgrade kit.

10 Attach the new bar code label provided in the upgrade kit to the bottomlatch of the MCU to identify it as an upgraded unit.

Note: Place the new bar code label over the old bar code label so that theold release number of the MCU is still visible. This number is not changedby the firmware upgrade and remains the same.

11 Select circuit pack options according to Option Settings and Site TestingProcedures, 323-1401-220. Options are different for the NT2H35CA andNT2H35KA.

12 Align the card with the slot, and insert part-way. Open the latches bysqueezing lightly (see Figure 3-2, "Installing modules in the DV-45 shelf", in Chapter 3).

13 Insert the card into position. Use the latches to secure the card into thebackplane connector.

Ñ continued Ñ



Procedure 9-1 (continued)Install DV-45 MCU firmware______________________________________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________



14 Replace the locking bar.

15 Once the upgraded MCU is plugged into a powered DV-45 shelf, the greenunit active LED should turn on. If the red LED remains on after power up,or turns on unexpectedly:

¥ Remove the EPROM chips and check for bent pins.

¥ Verify that the EPROM chips are in the correct sockets with notches properly aligned, and that they have not been confused with EPROM chips belonging to another card.

Damaged or defective devices must be replaced.

Ñ end Ñ

Procedure 9-1 (continued)Install DV-45 MCU firmware______________________________________________________________________________________________________________________________

Step Action______________________________________________________________________________________________________



Figure 9-1 (FW-1692.1)

Maintenance control unit firmware location

MCU

SHELFALARM

MAJORMINOR

ALARMCONTROL

ACO

LAMP TEST

ALARMSTATUS

BAT ABAT B

REM

ORDERWIRE

C/D 1

C/D 2

C/D 3

C/D 4

SELECT

JACK

UNITON

FAIL

AlarmCut-Off

Lamp Test/Learn

U2 U3

8 S

yn A

larm

Ena

ble

7 R

emot

e A

larm

Ena

ble

6 X

-bit

Ena

ble

5 S

ingl

e A

ddre

ss

4 T

L1 (

port

0)

3 E

2A M

appi

ng 1

/TL1

(po

rt1)

2

E2A

Add

ress

MS

B 0

/Not

Use

d1

E2A

Add

ress

LS

B 0

/Not

Use

d

Syn

c A

larm

Dis

able

R

emot

e A

larm

Dis

able

X

-bit

Dis

able

D

ual A

ddre

ss

E2A

(po

rt0)

E

2A M

appi

ng 2

/DV

LN (

port

1)

E2A

Add

ress

MS

B 1

/Not

Use

dE

2A A

ddre

ss L

SB

1/N

ot U

sed

SW3 SW4

DVLN Address

8

7

6

5

4

3

2

1

B

A



iii


Safety guidelines and warnings 1-1Circuit packs 1-1

Handling circuit packs 1-2Storing circuit packs 1-2Installation and replacement 1-2

_______________________________________________________________________________________________________

Option Settings (DV-45B) 2-1

List of proceduresProc. 2-1 Select options for the DV-45B coder module NT2H03 2-2Proc. 2-2 Select options for the DV-45B decoder module NT2H04 2-5Proc. 2-3 Select options for the Data Comm Sync (DCS) unit 2-7Proc. 2-4 Select options for the NT2H35CA MCU module 2-13Proc. 2-5 Select options for the NT2H35KA MCU module 2-16_______________________________________________________________________________________________________________

Option Settings (DV-45 A) 3-1

List of proceduresProc. 3-1 Select options for the DV-45 A coder module NT2H01 3-2Proc. 3-2 Select options for the DV-45A decoder module NT2H02 3-4Proc. 3-3 Selection options for the NT2H30 auxiliary DS1 interface 3-6Proc. 3-4 Select options for the NT2H35AA MCU module 3-9__________________________________________________________________

Test apparatus 4-1_______________________________________________________________________________________________________

Initial setup 5-1List of proceduresProc. 5-1 Calibrating video waveform analyzer 5-2Proc. 5-2 Verify DS1 digital transmission test set performance 5-4Proc. 5-3 Verify DS3 digital transmission receiver test set performance 5-6Proc. 5-4 Measure shelf power 5-7_______________________________________________________________________________________________________

Option Settings and Site Testing Procedures 323-1401-220 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996


iv Contents

Coder and decoder tests 6-1List of proceduresProc. 6-1 Video level tests 6-2Proc. 6-2 Video Signal to Noise Ratio 6-5Proc. 6-3 Local DS3 tests 6-8Proc. 6-4 End-to-end DS3 test 6-9Proc. 6-5 Analog audio continuity test 6-10_______________________________________________________________________________________________________

Auxiliary data interface tests 7-1List of proceduresProc. 7-1 Testing the auxiliary DS1 7-2Proc. 7-2 Testing RS-232/RS422 Data Channels 7-4_______________________________________________________________________________________________________

Maintenance control unit tests 8-1List of proceduresProc. 8-1 Test minor and major alarm relay closures 8-2Proc. 8-2 Test E2A (TBOS) alarm interface 8-4Proc. 8-3 Loopback test 8-5Proc. 8-4 Test DV-45 TL1 alarm interface 8-8_______________________________________________________________________________________________________

FiguresFigure 5-1 Video test set calibration 5-3Figure 5-2 Composite test signal no. 1 5-3Figure 5-3 DV-45 shelf Ñ power leads 5-8Figure 6-1 Video test connections 6-3Figure 6-2 Composite test signal no. 1 6-3Figure 6-3 Video test connections 6-7Figure 6-4 100 IRE Pedestal 6-7Figure 6-5 Local DS3 test 6-8Figure 6-6 End-to-end DS3 test 6-9Figure 6-7 Audio test setup 6-11Figure 7-1 Auxiliary DS1 channel test setup 7-3Figure 7-2 DCS channel setup 7-5Figure 8-1 Video loopback setup 8-6Figure 8-2 Coder faceplate 8-7_______________________________________________________________________________________________________

TablesTable 4-1 Recommended test apparatus and test cords 4-1Table 5-1 Required operating voltage 5-7


2-1

Option settings (DV-45 B)This chapter describes how to set the options for DV-45B plug-in modules.

List of procedures2-1 Select options for the DV-45B coder module NT2H03 2-2

2-2 Select options for the DV-45B decoder module NT2H04 2-5

2-3 Select options for the Data Comm Sync (DCS) unit 2-7

2-4 Select options for the NT2H35CA MCU module 2-13

2-5 Select options for the NT2H35KA MCU module 2-16

2-2 Option settings (DV-45B)


Procedure 2-1Select options for the DV-45B coder module NT2H03_______________________________________________________________________________________________________

Purpose: This procedure details the steps required to select the video coding mode,enable options, and set the DS3 LBO settings on the DV-45B coder module.

_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

1 Refer to Figure 2-1 and select the S1 switch settings as per Table 2-1.

2 Refer to Figure 2-1 and set S1 (DS3 Out) and S2 (DS3 Monitor) LBOswitches according to the distance to the cross-connect as follows:

_______________________________________________________________________________________________________

Table 2-1Coder Unit S1 switch settings

Switch No. Positions Description

8, 7 Coding Mode Select coding mode as per Table 2-2.

6 1 = DS-1 audio Select for DS1 digital audio input. 0 = Analog audio: 4 x 15 KHz audio output.

5 1 = B8ZS Selects B8ZS coding for digital audio input.0 = AMI Selects AMI coding.

4 1 = Disable HBIF Horizontal Blanking Interval Filter option0 = Enable HBIF for NT2H03CA/CB Coders only.

3 1 = Free run Coder generates DS3 clock, Normalapplications.

0 = Loop timing DS3 clock from decoder, Synchronousswitch application.

2 1 = Test Do not use, factory test.0 = Normal Select Normal setting

1 not used

Table 2-2Video coding mode selection

S2, S3 LBO switch settings for NT2H03 coder

Option settings (DV-45B) 2-3

Option Settings and Site Testing Procedures 323-1401-220 FWP02 3.01

LBO switch settingsDistance to DSX-3 panel

RG-59 NE-728

IN 0 Ð 50m (0 Ð 164 ft) 0 Ð 70 m (0 Ð 230 ft)

OUT 50 Ð 76 m (164 Ð 250 ft) 65 Ð 137 m (214 Ð 451 ft)

Positions Description

8 7

1 1 6-bit DPCM. Select for data applications

1 0 Enables Broadcast Quality option. Select only if BQ option equipped.

0 1 7-bit DPCM. Network Quality coding

0 0 7-bit PCM. Not recommended for DV-45B.




DV-45B Coder unit switch settings (NT2H03)

VIDEO STATUSSYNC LOSS

LOOP BACKLOCAL ACTIVEREMOTEREQUESTED

REM. REQ.

ON OFF

UNITON

FAIL

Coder

S2

S3

DS-3 Out

DS-3 Mon

LBOOut

LBOIn

LBOOut

LBOIn

6 A

nalo

g A

udio

5 A

MI

4

3 L

oopt

imin

g2

Nor

mal

Set

ting

1

B

A

6 bi

t/BQ

Net

wor

k Q

ualit

yD

S-1

Aud

ioB

8ZS

Fre

e R

unT

est

S1

7bit

BQ

HBIF Option

HB

IF E

nabl

eH

BIF

Dis

able

Broadcast Quality (BQ)Option



Procedure 2-2Select options for the DV-45B decoder module NT2H04_______________________________________________________________________________________________________

Purpose: This procedure lists the steps required to enable video loopback, Framestore/Black output, alarm holdoff and digital audio on the DV-45B decoder unit.There is no DS3 LBO setting on the decoder board, an automatic LBO circuitadjusts for cabling distances of up to 137 m. Coding mode is selected on the coderunit.

_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

1 Refer to Figure 2-2 and select S1 switch settings according to Table 2-2.

Table 2-2S1 switch settings Ñ decoder

Table 2-3Digital audio LBO settings

Switch Options

1 1 = Loopback Enable: Enable maintenance loopback.0 = Loopback Disable: Disable loopback feature

2 1 = No Video output: 0 volts output on Signal loss.0 = Black/Frame Store: Generates black video output on

Signal loss. Generates last field when FS option is equipped.

3 1 = 8 sec holdoff: Select to holdoff video sync loss alarm 8 sec.0 = No holdoff: Select for immediate alarm declaration.

4 1 = B8ZS: Selects B8ZS coding for DS-1 Digital Audio output.0 = AMI: Selects AMI coding.

5, 6, 7 DS-1 LBO. Set per Table 2-3.

8 1 = DS-1 audio: For digital DS1 audio output.0 = Analog audio: 4 x 15 KHz audio output.

Distance to DSX-1 Connection S17 6 5

0 - 40 m (0 - 133 feet) 0 1 140 - 80 m (133 - 266 feet) 1 0 080 - 120 m (266 - 399 feet) 1 0 1120 - 160 m (399 - 533 feet) 1 1 0160 - 200 m (533 - 655 feet) 1 1 1




DV-45B Decoder unit switch settings (NT2H04)

VIDEO STATUSSYNC LOSS

BLACK ACTIVE

DIGITALSIGNAL STATUS

DS3 DEGRADEDDS3 FAILEDAIS DETECTED

UNITON

FAIL

Loop

back

Dis

able

Bla

ck/F

S V

ideo

Out

put

No

Syn

c Lo

ss H

oldo

ffA

MI

Ana

log

Aud

io

Loop

back

Ena

ble

1N

o V

ideo

28

sec.

Ala

rm H

oldo

ff 3

B8Z

S 4 5 6 7

DS

-1 A

udio

8

DS

-1 L

BO

S1

B

A

Decoder

Frame Store (FS) Option



Procedure 2-3Select options for the NT2H31 Data Comm Sync (DCS) Unit_______________________________________________________________________________________________________

Purpose: This procedure shows how to configure the modes of the DCS unit toselect DS-1, RS-232 or RS-422 data interface. Each interface is configuredaccording to the desired rate and protocol._______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

Select Data Mode

1 Locate S9 on the DCS circuit pack (see Fig. 2-3).

2 Set position 8 to zero for Drop option so as to enable data transmission. Setto 1 if DCS used for DS3 frame synchronization without data. If set to 1,proceed to set DS3 LBOs, all other settings ignored.

3 For data transmission, set positions 1, 2 and 3 according to the desiredmode.

________________________________ continued ________________________________

SW 9Mode 3 2 1 Capacity

0 0 0 0 4 DS-1s1 0 0 1 2 RS232, 3 DS-1s2 0 1 0 1 RS232, 1 RS422, 2 DS-1s3 0 1 1 1 RS232, 1 RS-422, 1 DS-14 1 0 0 2 RS-422, 1 DS-15 1 0 1 2 RS-422, 2 DS-1s



Procedure 2-3 (continued)Select options for the NT2H31 Data Comm Sync (DCS) Unit_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

4 The RS-422 channels can be optioned for a tri-state output. If requiredlocate positions 6 and 7 and set to tri-state enable or disable as desired.

RS-422 Tri-State Enable

If multiple DCS units are connected to a single data source in a tri-statemode, then the last unit on the bus must provide terminations or the Rx andClk.

RS-422 Bus Terminations

________________________________ continued ________________________________

J5 In - To select Channel 2 RS-422 Rx terminationOut - Normal position

J6 In - To select Channel 1 RS-422 Clk terminationOut - Normal position

J7 In - To select Channel 2 RS-422 Clk terminationOut - Normal position

J8 In - To select Channel 1 RS-422 Rx terminationOut - Normal position

Posn 6 1 = Ch.1 tri-state enable

0 = Ch.1 tri-state disable

Posn 7 1 = Ch.2 tri-state enable

0 = Ch.2 tri-state disable


Step Action_______________________________________________________________________________________________________

Set DS3 LBOs

Note: Independent LBO circuits are provided to accommodate cablingdistances for line and equipment outputs.

1 Locate S1 LBO setting for the DS3 to local coder or switch equipment.Locate S2, LBO setting for the DS3 to the transmission system.

DS3 LBO switch settings for NT2H31 DCS Unit

Select DS-1 Coding

Note: The DCS unit can provide up to four DS-1 interfaces in mode 0.Each is independently configured. In modes 1 to 5 DS-1 #1 should be set toB8ZS.

1 Locate S12 and select either AMI or B8ZS Tx coding for the DS-1.

2 Locate S13 and select either AMI or B8ZS Rx coding for the DS-1

3 Locate S11 and select either an unframed all ones (A1S) or all zeros (A0S)for output upon loss of signal.

4 Locate LBO S3 for DS-1 #1, LBO S5 for DS-1 #2, LBO S4 for DS-1 #3and LBO S10 for DS-1 #4. Set according to table, as follows:

5 Set S1 and S2 according to the table, as follows:

DS1 LBO switch settings for NT2H31 DCS Unit

________________________________ continued ________________________________

Distance to cross-connect Setting

0-46m (0 - 150 ft) Short

46 - 137 m (150 - 450 ft) Medium

137 - 200 m (450 - 650 ft) Long

LBO switch settingsDistance to DSX-3 panel

RG-59 NE-728

IN 0 Ð 50m (0 Ð 164 ft) 0 Ð 70 m (0 Ð 230 ft)

OUT 50 Ð 76 m (164 Ð 250 ft) 65 Ð 137 m (214 Ð 451 ft)






Step Action_______________________________________________________________________________________________________

Select Data Channel Configuration, Modes 1 to 5

1 Locate S8 for Data Channel 1. Locate S7 for Data Channel 2.

2 Set position 8 to select HDLC or asynchronous data channel. Set positions2 to 7 according to Table 2-4 for HDLC and Table 2-5 for asynchronouschannels.

_______________________________________________________________________________________________________

Table 2-4HDLC Data Channel Settings, Ch. 1 = S8, Ch. 2 = S7

Position

1 1 = NRZI Encoding Select as required0 = NRZ Encoding

2 1 = 32 bit CRC Select as required0 = 16 bit CRC

3 1 = Transmit Idles Select as required0 = Transmit Flags

4 1 = External Clk External if terminal equipment supplies clock.0 = Internal Clk Internal for the DCS to generate clock.

5, 6, 7 Data Rate See Table 2-6.

8 1 = HDLC Select for HDLC data channels.

Table 2-5Asynchronous Data Channel Settings, Ch. 1 = S8, Ch. 2 = S7

Table 2-6Data Rate Ch. 1 = S8, CH. 2 = S7

By selecting DVLN V1.X, the channel defaults to 9600 bps, 8 bits, Odd, 2. Byselecting DVLN V2.X, the channel defaults to 19.2 Kbps, 8 bits, Odd, 2. The otherswitches will be ignored.

7 6 5 Async Sync

0 0 0 1200 24000 0 1 2400 96000 1 0 9600 19.2 K0 1 1 19.2 K 38.4 K1 0 0 38.4 K 56 K1 0 1 DVLN V1.X 64 K1 1 0 DVLN V2.X 128 K1 1 1 Not Used 256 K



Position

1 1 = 2 Stop bit Select 1 or 2 stop bits as required0 = 1 Stop bit

2 1 = Even Select Odd or Even Parity as required0 = Odd Parity

3 1 = Parity Select to generate parity bits as required.0 = No Parity

4 1 = 8 bits Select 8 or 7 data bits as required.0 = 7 bits

5, 6, 7 Data Rate See Table 2-6.

8 0 = Async Set to Async for asynchronous datachannels.




NT2H31 AA Switch Options (DVLN Settings Shown)

DS

-1 #

1D

S-1

# 2

DS

-1 #

3D

S-1

# 4

DIGITAL SIGNALSTATUS EQPT

DS3 DEGRADED

DS3 FAILED

AIS DETECTED

DIGITAL SIGNALSTATUS LINE

DS3 DEGRADED

DS3 FAILED

AIS DETECTED

DATA COMMUNICATIONSTATUS

DATA DEGRADED

UNITON

FAIL

S7

Data Chan 2ProtocolSettings

S8

S9

Not UsedNot Used

Pass Thru

123Not UsedNot Used

Drop

Mode

S14

B A

S1

LBO Out LBO In

DS-3 Eqpt Out

S2

DS-3 Line Out

LBO Out LBO In

ShortDS-1 # 1 LBO Medium

Long


Long


Long


Long

S3

S5

S4

S10

LBO

for DS

-1 interfaces

Tx Code AIS Rx Code

DS

-1 #

1D

S-1

# 2

DS

-1 #

3D

S-1

# 4

S11

S12

S13

B

A

DCS Unit

Legend:= Green

= Red

= Yellow

AM

IA

MI

AM

IA

MI

All

1sA

ll 1s

All

1sA

ll 1s

DS

-1 #

1D

S-1

# 2

DS

-1 #

3D

S-1

# 4

B8Z

SB

8ZS

B8Z

SB

8ZS

All

0sA

ll 0s

All

0sA

ll 0s

B8Z

SB

8ZS

B8Z

SB

8ZS

Not

Use

d

AM

IA

MI

AM

IA

MI

Not

Use

d

Data Chan 1ProtocolSettings

DATA TRANSMITTED

DATA RECEIVED

RS-422 Tri-state

OutIn

J8

InOut

J5

InOut

J7

OutIn

J6

12345678



Procedure 2-4Select options for the NT2H35CA MCU module_______________________________________________________________________________________________________

Purpose: This procedure lists the steps required to select options for theNT2H35CA MCU.

_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

1 Locate SW3 on the unit as shown in Fig. 2-4.

2 Select options according to Table 2-7.

Table 2-7SW3 switch settings setting - MCU


1 E2A address LSB Set the least significant bit in the address of0/1 the DV-45 shelf on the E2A port. Set per Table 2-8 for

E2A mapping 1 or Table 2-9 for mapping 2.

2 E2A address MSB Sets the most significant bit in the address of0/1 the DV-45 shelf on the E2A port. Set per Table 2-8 for

E2A mapping 1 or zero for mapping 2.

3 E2A Mapping 2 Select Mapping 1 for 4 MCUs per port. SelectMapping 1 Mapping 2 for 2 MCUs per port.

4 DVLN V2.0/V1.0 Set data rate for DVLN applications, otherwise ignored.

5 Not used.

6 No used.

7 Remote Alarm Enables/Disables remote alarm gatheringEnable/Disable and display.

8 Sync Alarm Enables/Disables major alarm on loss ofEnable/Disable video synchronization.



Procedure 2-4 (continued)Select options for the NT2H35CA MCU module_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

3 Select DVLN address on SW4 if required, see DVLN literature otherwiseunused. It is a binary address from 0 to 255.

SW4 DVLN address.

Table 2-8E2A address settings E2A Mapping 1


MCU MSB LSB Displays

0 0 0 0 - Units # 0, #11 - Units #2, #32 - Units #4, #53 - Units #6, #7

1 0 1 4 - Units #0, #15 - Units #2, #36 - Units #4, #57 - Units #6, #7


1 0 0 0 - Local1 - Remote




position Value

1 12 23 44 85 166 327 648 128


Option Settings and Site Testing Procedures 323-1401-220 FWP02 3.01NTP Update 94-015 January 1995


Maintenance control unit settings (NT2H35CA)

MCU

SHELFALARM

MAJORMINOR

ALARMCONTROL

ACO

LAMP TEST

ALARMSTATUS

BAT ABAT B

REM

ORDERWIRE

C/D 1

C/D 2

C/D 3

C/D 4

SELECT

JACK

UNITON

FAIL

AlarmCut-Off

Lamp Test/Learn

8 S

yn A

larm

Ena

ble

7 R

emot

e A

larm

Ena

ble

6 U

nuse

d5

Sin

gle

Add

ress

4 D

VLN

V1.

03

E2A

Map

ping

12

E2A

Add

ress

MS

B 0

1 E

2A A

ddre

ss L

SB

0

Syn

c A

larm

Dis

able

Rem

ote

Ala

rm D

isab

leU

nuse

dD

ual A

ddre

ssD

VLN

V2.

0E

2A M

appi

ng 2

E2A

Add

ress

MS

B 1

E2A

Add

ress

LS

B 1

SW3 SW4

DVLN Address

8

7

6

5

4

3

2

1

B

A



Procedure 2-5Select options for the NT2H35KA MCU module_______________________________________________________________________________________________________

Purpose: This procedure lists the steps required to select options for theNT2H35KA MCU.

_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

1 Locate SW3 on the unit as shown in Figure 2-5.

2 Select options according to Table 2-10.

Table 2-10SW3 switch settings setting - NT2H35KA MCU


1 E2A address LSB Sets the least significant bit in the address of the DV-45 0/1, or Not Used shelf on the E2A port if switch 4 of SW3 is set for

TBOS. See Table 2-9 for E2A Mapping 1 addresssettings or Table 2-10 for E2A Mapping 2 addresssettings. Not used when switch 4 of SW3 is set for TL1.

2 E2A address MSB Sets the most significant bit in the address of0/1, or Not Used the DV-45 shelf on the E2A port if switch 4 of SW3 is

set for TBOS. See Table 2-9 for E2A mapping 1address settings or Table 2-10 for E2A mapping 2address settings. Not used when switch 4 of SW3 is setfor TL1.

3 E2A Mapping 2/ Selects either E2A Mapping 1 for four MCUs per port, DVLN (port 1), or or E2A Mapping 2 for two MCUs per port, whenE2A Mapping 1/ switch 4 of SW3 is set to E2A-TBOS. When switch 4 ofTL1 (port 1) SW3 is set to TL1 on RS-232 port 0, then switch 3

selects either DVLN on RS-232 port 1, or TL1 onRS-232 port 1, in addition to TL1 on RS-232 port 0.

4 E2A (port 0)/TL1 (port 0) Selects either E2A on port 0 to enable the E2A-TBOSalarm interface, or TL1 on RS-232 port 0 to enable theDV-45 TL1 alarm interface.

5 DVLN Dual/Single Selects either dual or single address for DVLNapplications, otherwise ignored.

Address

6 X-bit Disable/Enable Enables/Disables X-bit transmission.

7 Remote Alarm Enables/Disables remote alarm gatheringEnable/Disable and display. This has no effect on the DV-45 TL1

interface.

8 Sync Loss Alarm Enables/Disables major alarm on loss ofEnable/Disable video synchronization.

Procedure 2-5 (continued)Select options for the NT2H35KA MCU module_______________________________________________________________________________________________________

Step Action_______________________________________________________________________________________________________

3 Select DVLN address on SW4 if required (see DVLN literature), otherwiseunused. It is a binary address from 0 to 255.

SW4 DVLN address.




0 0 0 0 - Units # 0, #11 - Units #2, #32 - Units #4, #53 - Units #6, #7

1 0 1 4 - Units #0, #15 - Units #2, #36 - Units #4, #57 - Units #6, #7






position Value

1 12 23 44 85 166 327 648 128





Figure 2-5 (FW-1692.2)

Maintenance control unit settings (NT2H35KA)

MCU

SHELFALARM

MAJORMINOR

ALARMCONTROL

ACO

LAMP TEST

ALARMSTATUS

BAT ABAT B

REM

ORDERWIRE

C/D 1

C/D 2

C/D 3

C/D 4

SELECT

JACK

UNITON

FAIL

AlarmCut-Off

Lamp Test/Learn

8 S

yn A

larm

Ena

ble

7 R

emot

e A

larm

Ena

ble

6 X

-bit

Ena

ble

5 S

ingl

e A

ddre

ss

4 T

L1 (

port

0)

3 E

2A M

appi

ng 1

/TL1

(po

rt1)

2

E2A

Add

ress

MS

B 0

/Not

Use

d1

E2A

Add

ress

LS

B 0

/Not

Use

d

Syn

c A

larm

Dis

able

R

emot

e A

larm

Dis

able

X

-bit

Dis

able

D

ual A

ddre

ss

E2A

(po

rt0)

E

2A M

appi

ng 2

/DV

LN (

port

1)

E2A

Add

ress

MS

B 1

/Not

Use

dE

2A A

ddre

ss L

SB

1/N

ot U

sed

SW3 SW4

DVLN Address8

7

6

5

4

3

2

1

B

A

Note: When switch4 of SW3 is set to TL1 (port 0), it defaults switch 3 settings to either DVLN (port 1) orTL1 (port 1), and switch 2 and 1 settings to Not Used. When switch4 of SW3 is set to E2A (port 0), it defaultsswitch 3 settings to either E2A Mapping2 or E2A Mapping 1, switch 2 settings to either E2A Address MSB 1or E2A Address MSB 0, and switch 1 settings to either E2A Address LSB 1 or E2A Address LSB 0.


Digital Video CodecDV-45Option Settings and Site Testing Procedures


Alarm and Trouble Clearing Procedures 323-1401-543 FWP02 3.01Revised for DV-45 FWP02 3.02 Addendum June 1996

iii

ContentsAbout this document v

Audience v_______________________________________________________________________________________________________

Safety guidelines and warnings 1-1Circuit packs 1-1

Handling circuit packs 1-2Storing circuit packs 1-2Installation and replacement 1-2

_______________________________________________________________________________________________________

DV-45 troubleshooting 2-1DV-45 alarm system 2-1Troubleshooting using circuit pack LEDs 2-2General troubleshooting 2-3Monitor and test connections 2-3Troubleshooting philosophy 2-3_______________________________________________________________________________________________________

Circuit pack LED definition 3-1Definition 3-1_______________________________________________________________________________________________________

Troubleshooting alarms 4-1Troubleshooting using circuit pack LEDs 4-1_______________________________________________________________________________________________________

General Troubleshooting 5-1_______________________________________________________________________________________________________

Serial interface alarm (E2A) 6-1Maintenance control unit 6-1E2A serial alarm port 6-1Interpreting E2A alarm displays 6-1Troubleshooting with E2A 6-2

_______________________________________________________________________________________________________

TL1 alarm surveillance interface 7-1Interpreting TL1 alarm messages 7-1Troubleshooting an alarm condition 7-1Troubleshooting a loss of communications 7-2

_______________________________________________________________________________________________________

iv Contents


FiguresFigure 2-1 DV-45 maintenance bus processor intercommunications 2-4Figure 3-1 Video coder (NT2H01 and NT2H03) 3-4Figure 3-2 Video decoder (NT2H02 and NT2H04) 3-5Figure 3-3 Data Comm Sync Unit (NT2H31) 3-6Figure 3-4 DS1 interface module (NT2H30) 3-7Figure 3-5 Maintenance control unit (NT2H35) 3-8

_______________________________________________________________________________________________________

TablesTable 3-1 Circuit packs LED definition 3-2Table 4-1 Troubleshooting with circuit pack LEDs 4-2Table 5-1 General troubleshooting 5-2

Alarm and Trouble Clearing Procedures 323-1401-543 FWP02 3.01


2-1

DV-45 troubleshooting 2-

This chapter briefly describes the alarm detection system of the DV-45 Digital Video Codec.

DV-45 alarm system

Each DV-45 circuit pack has its own micro-processor controller performing alarm surveillance and diagnostics. The micro-processor controller detects failure of an on-board circuit or traffic, and routes alarm information to both LED faceplate indicators on the DV-45 circuit packs, and the internal maintenance bus (MBus) on the DV-45 shelf backplane.

The optional DV-45 maintenance control unit (MCU) circuit pack can be equipped in DV-45 shelves to support serial or parallel alarm surveillance output. Without the MCU, only the LED faceplate indicators on the DV-45 circuit packs are provided for DV-45 alarm surveillance and interpretation.

Figure 2-1 shows the processor communication network of the DV-45 shelf. The MCU collects alarms from the internal MBus on the DV-45 shelf backplane, classifies them as major or minor, stores them in memory, and routes them to parallel (relay closure) and either E2A-telemetry byte oriented serial (TBOS) or Transaction Language 1 (TL1) alarm surveillance ports at the rear of the DV-45 shelf. For more information on the E2A-TBOS and DV-45 TL1 alarm surveillance interfaces, see Chapter 6, Chapter 7, and Digital Video Codec DV-45


, 323-1401-102.

Note:

Implementing TL1 alarm surveillance on DV-45 equipment disables E2A-TBOS alarm surveillance, and vice versa.

The alarm information collected by the MCU is the same information displayed on the circuit pack faceplates. Remote alarm information is transmitted by way of the DS3 X-bits and can be disabled on the MCU.


2-2

DV-45 troubleshooting



The major alarm for Video Sync Loss can be enabled or disabled, or an 8 second holdoff can be selected. Any condition (for example, fuse fail, video loss), which may be either due to failures on the circuit pack, or due to external causes, generates a unit fail alarm that is registered as a major alarm.

Troubleshooting using circuit pack LEDs

All DV-45 circuit packs are equipped with faceplate LEDs. These LEDs indicate the status of each circuit pack for the purpose of alarm surveillance and interpretation. This section tells where to find the LED definitions for DV-45 circuit packs to aid in the troubleshooting of DV-45 system problems.

Chapters 3 and 4 provide LED definitions for the following DV-45 circuit packs:

• DV-45B coders and decoders

• DCS units

• MCUs

LED definitions for DV-OC3 line interface units are provided in Chapter 3, “Alarm indications”, of the Digital Video Codec DV-45

DV-OC3 Unit Reference Manual

, 323-1401-380.

LED definitions for the following Nortel Supertrunk circuit packs are provided in Chapter 3, “Circuit pack descriptions”, of the Nortel Supertrunk

System Description

, 324-2301-100:

• DV-45B BTSC coders and decoders

• Music-E45 multiplexers and demultiplexers

• Games-S45 multiplexers and demultiplexers

• Stereo-FM45 multiplexers and demultiplexers

Also see Chapter 1, “Supertrunk alarm facilities”, of the Nortel Supertrunk


, 324-3201-500, for a summary of the alarms that can be generated by Nortel Supertrunk circuit packs.

Note:

The Nortel Supertrunk is an advanced cable services system that uses the DV-45 system as a building block for distributing video and specialty service signals over a broadband digital network. Contact your next level of support or your Northern Telecom support group for more information on the Nortel Supertrunk system.


2-3



General troubleshooting

Chapter 5 provides general advice and steps to be taken to analyze and correct DV-45 system problems that might occur.

Monitor and test connections

To aid in systems monitoring and troubleshooting, the DV-45A and DV-45B units are equipped with the following monitor points:

•

Coder unit video monitor.

This is a loop monitor point for connection to other equipment. The monitor must be terminated in 75

Ω

.

•

Coder unit DS3 monitor.

The coder module has a second DS3 output. This output can be used as a second DS3 driver or as a test point for the output DS3. It has an independent driver circuit and uses a BNC connector.

•

Decoder unit video monitor.

The decoder module has a second video output for monitoring the incoming signal. It uses a BNC connector and specifications are not guaranteed.

•

Decoder unit DS3 monitor.

A hybrid splits the DS3 input. This DS3 can be tested with a DS3 test generator for parity measurements. This BNC connector should not be used to connect to another system. If the board is removed, no signal appears at the connector. The DS-3 monitor must be terminated in 75

Ω

•

Coder/decoder audio monitors.

Each of the audio channels has a 600

Ω

balanced input or output. The audio monitor connections are 10 k

Ω

monitor points for DV-45A coders and decoders and should not be connected on DV-45B units. Used for data interface connectors for the DCS unit.

Troubleshooting philosophy

Identify the most upstream alarm and determine which bay, shelf, and circuit pack is in alarm. Then, clear the alarms one channel and one direction at a time. Many features are selected with circuit pack DIP switches and may be disabled. Unit fail may signify loss of input signal. DV-45A and DV-45B coder and decoder units are not compatible.

CAUTION

Safety guidelines

Refer to the Safety guidelines, Chapter 1. Care must be taken not to interrupt traffic or perform any traffic-affecting task without a valid reason. Ensure that the traffic has been rerouted prior to replacing any traffic-carrying circuit pack.

2-4




Figure 2-1DV-45 maintenance bus processor intercommunications

(FW-0295.1)

Local alarmsTx DS3 X-bits

µControllerRest of

Coder Unit

Loopbackrequest

LEDs onfaceplate

Coder unit

µController Rest of Unit

LEDs onfaceplate

Optional DCS unit

Remote alarmsRx DS3 X-bits

µControllerRest of

DecoderUnit

LEDs onfaceplate

Decoder unit

Maintenance Bus - MBus

DS-3 X-bitsremote alarms

µControllerRest of

MCU unit

E2Aserial

interface

Alarmrelays

TL1surveillance

interface

E2A portlocated onbackplane

Dry contactsurveillance

pointslocated onbackplane

RS-232port located

on backplane

E2A alarmscannersystem

Relayalarm

system

TL1operations

system

LEDs onfaceplate

MCUDV-45 shelf

FW-0295.1


5-1

General troubleshootingThis chapter provides general advice and steps to be taken to analyze and correctproblems that might occur.

Table 5-1 lists some conditions not indicated by LEDs on the unit faceplate. Video,audio, and miscellaneous problems are listed with a brief description of possiblecauses and suggested courses of action.

Most DV-45 communication problems are the result of faulty connections or incorrectly set option switches. Before proceeding with the troubleshooting guidelines in Table 5-1, carefully check all cables in the communications pathwhere difficulty has been experienced and ensure that the option switches on allcards are set properly.

If you have connected the E2A-TBOS or TL1 alarm interface from the optionalDV-45 MCU, review the reports from the alarm monitoring system. These maysuggest a fault location.

See Chapter 6 for information on analyzing and correcting E2A-TBOS alarms.

See Chapter 7 for information on analyzing and correcting DV-45 TL1 alarms.

5-2 General troubleshooting


Table 5-1General troubleshooting

Probable cause: Wrong impedance terminations.

Action to take: Check video in/out and monitor connections for a 75Ω termination. Checkthe video source and the monitors for 75Ω settings.

Probable cause: Data Comm Sync unit used with wrong options on coder unit.

Action to take: Set coder options to 6 bit DPCM.

Probable cause: No video input.

Action to take: Check the video source.

Probable cause: No DS3.

Action to take: Check the coder/decoder LEDs.

Probable cause: Black signal on.

Action to take: Check the decoder option settings.

Probable cause: No time base correction (TBC) on source.

Action to take: Add time base correction (TBC) to the video input.

Probable cause: Data Comm Sync unit used with wrong options on coder unit.

Action to take: Set coder options to 6 bit DPCM.

Probable cause: Frame store on decoder activated by loss of signal.

Action to take: Check video input to coder. Check DS3 input to decoder.

Still image

Fuzzy image, High SNR

Break up video

No video

Poor image, washed-out colorWrong signal levelsBurn out (white) of light areas

Video problems

– continued –

General troubleshooting 5-3


Table 5-1 (continued)General troubleshooting

Probable cause: Wrong settings, optioned for digital DS-1 audio.

Action to take: Set the coder and the decoder to analog audio.

Probable cause: Coder/decoder does not have analog audio. (DV-45A only)

Action to take: Check the coder or the decoder product code for audio options.

Probable cause: Audio connections made to audio monitor connectors.

Action to take: Move wires to audio program connections.

Probable cause: Wrong impedance.

Action to take: Set the audio equipment to 600 Ω impedance.

Probable cause: Incorrect wiring.

Action to take: Verify the connection to the alarm scanner system.

Probable cause: Incorrect E2A address.

Action to take: Verify the E2A shelf address on the MCU.

Probable cause: MCU optioned for wrong alarm mapping.

Action to take: Consult E2A alarm tables for Mapping 1 and Mapping 2 (see Alarms andSurveillance,323-1401-302). Set MCU to desired mapping.

Wrong alarm points

Not functional

Poor audio quality

No audio

Audio problems

Serial alarm port

– continued –




Probable cause: Two MCUs have the same address.

Action to take: Verify the E2A shelf address on the MCU.

Probable cause: The alarm scanner does not comply with the E2A standards and cannotaccept tri-state output.

Action to take: Add pull-up/pull-down resistors to the input of the alarm scanner to con-form with E2A requirements.

Probable cause: MCU optioned for DV-45 TL1 alarm interface. The E2A-TBOS port doesnot function with TL1 enabled.

Action to take: Verify the MCU option settings according to Digital Video Codec DV-45Option Settings and Site Testing Procedures, 323-1401-220. Set to desiredalarm interface.

Probable cause: Incorrect options.

Action to take: Check DCS unit options for mode and data channel settings.

Probable cause: Wrong connections.

Action to take: Check connections. Ensure connections made to correct slot, correct direction and polarity.

Probable cause: Incorrect clocking in HDLC mode.

Action to take: Check clocking requirements and wiring. Verify internal/external clockoption.

No continuity

Data Channel Problems

E2A-TBOS port not functioning

Alarm scanner crashes

Corrupted data

– continued –

General troubleshooting 5-5



Probable cause: Incorrect options.

Action to take: Check DCS unit options.

Probable cause: Wrong connections.

Action to take: Check connections. Ensure connections made to correct slot, correct direction and polarity.

Corrupted data





7-1

TL1 alarm surveillance interface 7-

This chapter provides general information for analyzing and correcting DV-45 system problems reported by the DV-45 Transaction Language 1 (TL1) alarm surveillance interface. For full information on the DV-45 TL1 alarm surveillance interface, see Chapter 5 in Digital Video Codec DV-45


, 323-1401-102.

Interpreting TL1 alarm messages

See Chapter 5 in Digital Video Codec DV-45


, 323-1401-102, for a description of

¥ the types of DV-45 TL1 alarm messages

¥ the common elements of DV-45 TL1 alarm messages

¥ the DV-45 TL1 alarms supported by the NT2H35KA maintenance control unit (MCU)

Troubleshooting an alarm condition

To troubleshoot an alarm condition:

¥ determine the nature of the alarm

¥ use system drawings or layout information to determine whether a coder, decoder, or other circuit pack is involved

¥ consult Chapter 2, ÒDV-45 troubleshootingÓ, and Chapter 5, ÒGeneral TroubleshootingÓ, for an explanation, probable cause, and suggested course of action

Note:

To interpret alarm conditions using the LED faceplate indicators on DV-45 circuit packs, see ÒTroubleshooting using circuit pack LEDsÓ in Chapter 2.


7-2




Troubleshooting a loss of communications

A loss of communications to the DV-45 circuit packs or the TL1 operations system (OS) can be detected using the non-autonomous TL1 retrieve header (RTRV-HDR) message. This message is used primarily to check that the DV-45 shelf is active on the network and responding to the TL1 OS on a periodic basis.

To troubleshoot a loss of communications, issue a RTRV-HDR request message from the TL1 OS to the selected DV-45 circuit pack. If the RTRV-HDR normal response message is not received from the selected circuit pack within a period of three minutes (in the worst-case estimate), or the RTRV-HDR error response message is received, then there is either an RS-232 link failure or a loss of communications to that circuit pack or the TL1 OS.

See Chapter 5 in Digital Video Codec DV-45


, 323-1401-102, for a full description of the retrieve header (RTRV-HDR) message format and parameters.

Documents

SONET Transmission Products Digital Video Codec DV-45