GENERAL ARCHITECTURE OF OCB-283 SUBSYSTEMS & FUNCTIONS OF OCB-283

GENERAL ARCHITECTURE OF OCB-283

SUBSYSTEMS & FUNCTIONS OF OCB-283

GENERAL FUNCTIONAL BREAKDOWN OF ALCATEL 1000 E-10 (OCB-283)

SUBSCRIBER ACCESSSYSTEM

CONNECTIONAND

CONTROL

OPERATIONAND

MAINTENANCE

CCITT #7SIGNALING NETWORK

TELEPHONE NETWORK

DATANETWORK

VALUEADDED NETWORK

O&MNETWORK

DISK

MAGTAPEPABX

OCB-283 ARCHITECTUREOCB-283 COMPRISES OF FOLLOWING 3

SUBSYSTEMS

SUBSCRIBER ACCESSSYSTEM

CONNECTIONAND

CONTROL

OPERATIONAND

MAINTENANCE

CCITT #7SIGNALING

NETWORK

TELEPHONE NETWORK

DATANETWORK

VALUEADDED NETWORK

O&MNETWORK

DISK

MAGTAPEPABX

• SUBSCRIBER ACCESS SUBSYSTEM

• CONTROL & CONNECTION SUBSYTEM

• OPERATION & MAINTENANCE SUBSYTEM

INTRODUCTION OF OCB-283 • OCB-283 is the latest Electronics Digital

ISDN type Switching technology being imported in INDIA

• THIS IS MANUFACTURED BY M/S ALCATEL OF FRANCE

• This Exchanage works on Stored Programme Control Principle.

• Exchange can work with all types of Circuit & Subscriber Signallings & also provides for lot of novel facilities to the subscribers.

• This exchange can work on Common Channel Signalling principle using the CCITT#7 reccommendations .

• Exchange has got 3 basic subsystems :-

•1 SUBSCRIBER ACCESS SUBSYSTEM

•2 CONNECTION & CONTROL SUBSYSTEM

•3. OPERATION & MAINTENANCE SUBSYSTEM

INTRODUCTION OF OCB-283

1. Subscriber Access Subsystem:-

•This is treated as an independent entity

•Every Subscriber Connecting Equipment Rack has got its Signalling Point Number to operate in Common Channel Signalling mode with rest of the exchange Subsystems.


2. Control & Connection Subsystem is the block consisting of

• A-CONTROL FUNCTIONS

• B-CONNECTION & SWITCHING EQUIPMENTS



• A-CONTROL FUNCTIONS

–COMPRISE OF COMMON CONTROL equipments which;

–process

–monitor

–& control the call setup & release


–CONNECTION &SWITCHING BLOCK COMPRISES OF

–Switching matrix equipment for performing digital time switcihing of speech path

–Connection equipments for connecting PCM (digital) Junctions from;

– other exchanges &

– RSU’s

– Auxiliary Equipments for Tones ,Frequencies & other auxillaries for signalling protocol handling .

3. OPERATION & MAINTENANACE SUBSYTEM :-

FOR O&M OF EXCHANGE BY OPERATORS


INTER NETWORKING WITH OTHER SYSTEMS

• THE OCB-283 CAN BE CONNECTED TO ANY TECHNOLOGY SWITCHES PROVIDED -THEY CATER TO STANDARD SIGNALLINGS

STANDARD SIGNALLINGS

• CHANNEL ASSOCIATED

– STEP BY STEP

– R2 MF

• COMMON CHANNEL SIGNALLING

LET US NOW UNDERSATAND

COMMON CHANNEL SIGNALING

BEFORE GOING FURTHER

EXCHANGEA

EXCHANGEEXCHANGECC

EXCHANGEEXCHANGEBB

COMMON SIGNALING CHANNELCOMMON SIGNALING CHANNEL

VOICE CHANNELSVOICE CHANNELS

OCB-283 FOLLOWS CCITT-NO 7 SIG.PROTOCOL FOR OCB-283 FOLLOWS CCITT-NO 7 SIG.PROTOCOL FOR

COMMON CHANNEL SIGNALINGCOMMON CHANNEL SIGNALING

SIGNALING TIME SLOT LINK CARRIES ALL THE SIGNALING SIGNALING TIME SLOT LINK CARRIES ALL THE SIGNALING FOR ALL THE VOICE CHANNELS BETWEEN TWO EXCHANGESFOR ALL THE VOICE CHANNELS BETWEEN TWO EXCHANGES

OCB-283 USES COMMON CHANNEL SIGNALING

BETWEEN ITS SUBSCRTIBER ACCESS SUBSYSTEM

& REST OF THE EXCHANGE

EQUIPMENTS

LET US SEE HOW SUBS ACCESS UNITS - CSN’S USECOMMON CHANNEL SIGNALING CCS#7

CCS SIGNALING POINTS IN REFERENCE TO OCB-283’s SUBSCRIBER ACCESS UNITS: CSNS

PS 1PS 2

PS 3

PS 5

PS 63

CSN 1CSN 2

CSN 3

PS 4

CSN 5

CSN 63

EXCH. COMMON PS=255 (LOCAL)

OCB-283

CSN 4

RSU

COC:- COMMON SIGNALING CHANNEL

COC

PS 1PS 2

PS 3

PS 5

PS 63

CSN 1CSN 2

CSN 3

PS 4

CSN 5

CSN 63

STPPS-2033

EXCH 1 PS=2000 SP1

EXCH 2 PS=3000 SP2

CCS SIGNALING POINTS FOR OCB-283 IN NATIONAL NETWORK

COC1

COC0

OCB-283NATIONALNATIONAL

CSN 4

RSU

PS= SIGNALING POINT NOSTP=SIGNAL TRANSFER POINT

CSNs ARE GIVEN LOCAL VERSION OF PS No.EXCHANGES & STP GET NATIONAL PSNo.

COC:- COMMON SIGNALING CHANNEL

CIC:- VOICE CHANNELS

COC:- COMMON SIGNALING CHANNELLOCAL

functional

architecture of OCB-283

OM MQ GX MR TX TR PC

COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR

COMMUNICATION MULTIPLEXTMN

2 MB/SPCM

CSNDBT

OCB-283 FUNCTIONALDIAGRAM

SMA

SMX

OCB-283 SWITCHING SYSTEMOCB-283 SWITCHING SYSTEMAny Automatic Switching System comprises in general of following distinct Subsystems :------

• Subscriber Access Subsystem• Connection & Control Subsystem --- which comprises of

(a) Switching Network Units(b) Circuit Connection Units(c) Common Control function units

• Operation & Maintenance Subsystem

In OCB-283 we can classify various units into following types according to the nature of their functions :-• Connection Units Connection Units

-These provide facility to connect a Speech path from a subscribers loop or circuits from an external PCM and transfers these Speech samples on to selected Time Slots called voice channelson a LR link (internal PCM)

- These units areNAME FUNCTIONAL NAME

(a) Subscriber Connection units CSNL, CSND, CSED(b) Circuit Connection Units SMT (URM )(c) Tones & Frequency Receiver/ SMA ( ETA ) Sender & Common Channel Signaling SMA ( PUPE ) Protocol Handler

•Switching Network Switching Network - These provides facility for CONNECTING the LRs (internal PCM’s)

coming from connection units and performs Switching Operation for Calling Subs TS onto Called Subscriber TS & vice versa for a two way connection per call of telephony.

• Control Units Control Units - These units provide control of calls on the basis of Stored programs

& they process the calls on reception of dialed digits from calling subscriber/ circuit & take part in handling of call setup & release by processing .monitoring, measuring charging of call & all other common control function s needed for working of an Automatic Common Control Exchange.

- These Control units can comprise of following Functions

FUNCTION NAME OF UNIT NATURE OF JOB

MR : Multiregister Call-handler SET UP & RELEASE OF CALLTR : Translator Translation of digit ,Data-bank of subs & ckts in filesMQ : Marker Message distribution between Common Control

& Connection units TX : Charger Computing the charge of a call, keeping metersGX : Matrix System Handler Processes & makes connections in Switching

matrix on the orders of MR or MQPC : Common Channel Signaling Manages the CCS#7 network for signaling

Network Controller

• O& M Units & Maintenance Peripherals :-O& M Units & Maintenance Peripherals :-- In an Electronic Stored Programme Control Digital Exchange like

OCB-283, all operation & maintenance activities are performed by a unit called O & M unitor OMC (Operation & Maintenance Center)

- This provides access for Man Machine dialogues for the human operators to interact and command the working of Exchange Equipments.


COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR


2 MB/SPCM

CSNDBT

SMA

SMX

SUBSCRIBER ACCESS SUBSYSTEM

SUBSCRIBER ACCESS SUBSYSTEM

• SUBSCRIBERS IN OCB-283 ARE CONNECTED ON “ DIGITAL SUBSCRIBER CENTER” CSN

• CSN CAN BE LOCAL OR DISTANT

• LOCAL CSN IS CALLED CSNL• DISTANT CSN IS CALLED CSND• SUBSCRIBERS CAN ALSO BE

CONNECTED VIA A CSED• PABX OR CENTREX SUBSCRIBER

CAN ALSO ACCESS TO OCB-283

OCB-283


COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR


2 MB/SPCM

CSNDBT

SMA

SMX

CONNECTIONSUBSYSTEM

•CONNECTION SUBSYSTEM COMPRISES OFSWITCHING MATRIX STATION

SMXTRUNK MULTIPLEX STATION SMTAUXILIARY EQUIPT. STATION SMA

& ALL ASSOCIATED LR LINKS

CONNECTION SUBSYSTEM

SWITCHING MATRIX STATION SMX

• SMX IS THE STATION WHERE TWO WAY TS SWITCHING IS DONE

• SMX HOLDS A SOFTWARE LOGICAL MACHINE MLCOM

• SMX ARE PROVIDED IN DUPLICATE FOR THE DUPLICATED SPEECH PATH AS SWITCHING IS FULLY DUPLICATED IN OCB-283

TRUNK MULTIPLEX CONTROL STATION :

SMT• SMT IS THE HARDWARE STATION WHERE THE

EXTERNAL PCMS ARE TERMINATED• LOGICAL FUNCTION OF SMT IS URM• SMT CONVERTS EXTERNAL PCM’s (HDB3) TO

BINARY & VICEAVERSA & MAKES LRLR LINKS TOWARDS SMX FOR SWITCHING

• SMT CAN CONNECT PCM’s FROM(a) CSND (RSU’S) OR (b)CSED (RLU’s) OR (c) PCM’s FROM A DISTANT EXCHNAGE

AUXILIARY EQUIPMENT UNITS: SMA

•SMA IS THE HARDWARE STATION WHICH SMA IS THE HARDWARE STATION WHICH SUPPORTS FOLLOWING AUXILIARY SUPPORTS FOLLOWING AUXILIARY EQUIPMENT FUNCTIONS :-EQUIPMENT FUNCTIONS :-

1. 1. ETAETA : PROVIDES TONES : PROVIDES TONES : FREQUENCY SENDER & RECEIEVER: FREQUENCY SENDER & RECEIEVER : CONFERENCE CIRCUITS: CONFERENCE CIRCUITS : EXCHANGE CLOCK IN FIRST TWO SMA : EXCHANGE CLOCK IN FIRST TWO SMA

2. 2. PUPE PUPE ::HANDLES HANDLES COMMON CHANNELCOMMON CHANNEL SIGNALING LINKS SIGNALING LINKS CARRYING CARRYING CCS7 PROTOCOL CCS7 PROTOCOL

ABOVE FUNCTIONS ARE CONNECTED TO SMX ABOVE FUNCTIONS ARE CONNECTED TO SMX BY LR LINKS FOR SWITCHINGBY LR LINKS FOR SWITCHING

COMMUNICATION MULTIPLEX


COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR

TMN

2 MB/SPCM

CSNDBT


SMA

SMX

CONTROLSUBSYSTEM

CONTROL SUBSYSTEM

• CONTROL SUBSYSTEM SUPPORTS ALL THE COMOMN CONTROL FUNCTIONS OF EXCHANGE WHICH SETUP & RELEASE A CALL

• COMMON CONTROL FUNCTIONS ARE :- MR,TR,TX,MQ,GX & PC

• IN SOFTWARE FORM THEY ARE CALLED LOGICAL MACHINES

• HARDWARE COMPONENT IS CALLED

MAIN CONTROL STATION SMC• ANY ONE OR MANY CONTROL FUNTIONS CAN

BE LOADED IN A HARDWARE STATION.

ROLE OF COMMON CONTROL FUNCTIONS

• THE MAIN CONTROL STATION SMC SUPPORTS THE FOLLOWING COMMOMN CONTROL FUNCTIONS FOR DOING THE DEFINED JOBS

- MR CALL HANDLER(OVERALL CONTROLLER OF CALLSETUP & RELASE)

- TR TRANSLATOR (DIGIT ANALYSIS & DATA )

- TX CHARGING DEVICE ( TAXING & METERS)

- MQMESSAGE DISTRIBUTOR (MARKING)

- GXMATRIX SYSTEM HANDLER (SWITCHING)

- PC CCS 7 SIGNALING LINKS NETWORK CONTROLLER (MONITORING OF PUPE)


COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR


2 MB/SPCM

CSNDBT


SMA

SMX

O & M SUBSYSTEM

OPERATION & MAINTENANCE SUBSYSTEM

• O& M COMPRISES OF DUPLICATED HARDWARE STATION SMM & SOFTWARE MACHINE OM

• IT IS THE PROCESSOR FOR OPERATION & MAINTENANCE OF EXCHANGE BY MAN MACHINE COMMANDS

• SMM PROVIDES ACCESS TO OPERATOR THROUGH PERIPHERALS LIKE TTY,VDU

• SMM ALSO HAS MAGTAPE & DISKS FOR STORAGE• THIS SUBSYSTEM CAN BE ACCESSED FROM

REMOTE NETWORK MANAGEMENT CENTRE NMC OR TELECOM MANAGEMENT NETWORK TMN


COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR


2 MB/SPCM

CSNDBT


SMA

SMX

COMMUNICATIONMULTIPLEX

COMMUNICATION COMMUNICATION MULTIPLEXMULTIPLEX

• COMMUNICATION MULTIPLEX IS THE HIGHWAY OF COMMUNICATION BETWEEN VARIOUS HARDWARE STATIONS OF OCB-283

• IT WORKS ON THE PRINCIPLE OF TOKEN RING

• THERE ARE TWO TYPE OF COMM. MULTIPLEXES – MISMIS– MAS MAS


COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR


2 MB/SPCM

CSNDBT


SMA

SMX

TIME BASE

SYNCHRONISATION & TIME BASE

• TIME BASE IS USED TO SYNCHRONISE THE LR LINKS

• TIMEBASE IS GENERATED IN OCB BYSTS EQUIPMENT

• STS COMPRISE OF THREE OSCILLATOR CARDS PROVIDING TRIPLICATE TIME BASE

• STS EQUIPMENT IS MOUNTED IN SMM RACK


COMETA

PUPE

SMTURM

MCX

CSNL

CKTS

LR (4MB / S) DT

LR

LR


2 MB/SPCM

CSNDBT


SMA

SMXLR LINKS

LR LINKS• LR LINKS ARE SPEECH CARRYING PCM LINKS

WORKING INTERNALLY IN THE EXCHANGE BETWEEN CONNECTION UNITS & SWITCHING MATRIX SMX

– CONNECTION UNITS ARE – CSNL SMT SMA

• LR’s ARE PAIR OF UNIDIRECTIONAL DIGITAL TIME DIVISION MULTIPLEXED PATHS :

– LRE -> ENTERING SMX

– LRS -> LEAVING SMX• THESE CARRY 32 TIME SLOTS IN A TIME FRAME OF

125 MICROSECOND WITH 16 BITS PER TIME SLOT• LR’s WORK ON 4.096 Mega Bits Per Second RATE• LR’s ARE ALSO CALLED MATRIX LINKS

IN OCB-283

CKTS

FUNCTIONAL EQUIPMENTS INVOLVED IN CALL HANDLING

CALL PROCESSING

OM

TR MR MQ GX PC

ETA

TX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC VC

SC

URM

PU/PE

SC: Signalling channelVC: Voice channel

• TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALING CHANNELS SC SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE)

CALL PROCESSINGNEW CALL ORIGINATION

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC VC

SC

URM

ETA


‘A’ ‘B’

PU/PE

• TS-16 OF LR 0 &LR 1 OF CSN ARE SIGNALING CHANNELS SC SC BETN. CSN & THE EXCHANGE EQUIPMENT (PU/PE)

• NEW CALL MESSAGE COMES ON SIG.CHANNEL SC

CALL PROCESSINGNEW CALL ORIGINATION

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC VC

SC

URM

ETA


‘A’ ‘B’

PU/PE

• NEW CALL MESSAGE IS SENT TO MR BY PUPE.

CALL PROCESSINGCALLING SUBS. COS IDENTIFICATION

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC VC

SC

URM

ETA


‘A’ ‘B’

PU/PE

• NEW CALL MESSAGE IS SENT TO MR BY PUPE.• MR REQUESTS CALLING SUBSCRIBER DATA FROM TR ..OVER

MIS• TR PROVIDES CALLING SUB’S COS DATA TO MR

CALL PROCESSINGCALLING SUBS. COS IDENTIFICATION

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC VC

SC

URM

ETA


‘A’ ‘B’

PU/PE

• MR REQUESTS MQ TO PROVIDE ADDRESS OF VC ON MCX (LR-LRX CORRESPONDENCE)

• MQ PROVIDES MCX SIDE ADDRESS TO MR

CALL PROCESSINGMCX SIDE ADDRESS OF VC

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC VC

SC

URM

ETA


‘A’ ‘B’

PU/PE

CALL PROCESSING

• MR ORDERS MCX FOR CONNECTING DIAL TONE TO CALLING SUBS. ON LRS-TS VC

• DIAL TONE IS PROVIDED FROM MCX (DIALTONE GIVEN BY ETA’s TS-LRE TO MCX)

DIAL TONE PROVISION TO CALLING SUBS.

CKTS

OM

TR MR MQ GX PC

ETA

TX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC DT

SC

URM


‘A’ ‘B’

PU/PE

CALL PROCESSING

• FIRST DIGIT IS RECEIVED VIA VOICE CHANNEL VC IN RGF OF ETA (FOR DTMF SUBS.)

RECEPTION OF FIRST DIGIT

CKTS

OM

TR MR MQ GX PC

ETA

TX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC

RGF

SC

URM


‘A’ ‘B’

PU/PE

CALL PROCESSING

• FIRST DIGIT IS RECEIVED VIA VOICE CHANNEL VC IN RGF OF ETA (FOR DTMF SUBS.)

• ETA SENDS IT TO MR ON MAS• DIAL TONE IS CUT OFF ON ORDERS OF MR

RECEPTION OF FIRST DIGIT

CKTS

OM

TR MR MQ GX PC

ETA

TX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC

RGF

SC

URM


‘A’ ‘B’

PU/PE

CALL PROCESSING

• FIRST FEW DIGITS ARE PRE-ANALYSED ON REQUEST OF MR BY TR

• REMAINING DIGITS MAY BE STILL BEING RECEIVED

DIGIT ANALYSIS

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC

RGF

SC

URM


‘A’ ‘B’

PU/PE

CALL PROCESSING• ANALYSIS OF DIGITS COMPLETED CALLED PARTY COS OBTAINED

ROUTING OF CALL -• MR ORDERS CSN-B TO TEST ‘B’ & GIVE VC FOR ‘B’• CSN-B TESTS ‘B’ AND GIVES RINGING TO ‘B’ • MCX GIVES RBT TO ‘A’

SELECTION

‘A’ ‘B’

CKTS

OM

TR MR MQ GX PC

A B

TX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC

RGF

SC

URM


PU/PE

CALL PROCESSING• CALLED PARTY B GOES OFF HOOK• CALLED PARTY’S CSN SENDS LOOP CONDITION & VC-B

INFORMATION TO MR OVER SC VIA PUPE• RINGING CURRENT & RBT ARE STOPPED

CALLED PARTY ANSWERS

‘A’ ‘B’

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC-A

RGF

SC

URM


PU/PE

VC-B

‘A’ ‘B

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC-A

RGF

SC

URM


PU/PE

CALL PROCESSING

• TWO UNIDIRECTIONAL CONNECTIONS ARE ESTABLISHED IN MCX ON ORDER OF MR VIA GX BETWEEN VC-A & VC-B

• ‘A’ & ‘ B ‘ CAN NOW CONVERSE

BOTHWAY CONNECTION

VC-B

‘A’ ‘B

CKTS

OM

TR MR MQ GX PCTX

MAS

MIS

SC SC

SC

MCX

COM

CSNL

CSND

CSNL

VC-A

RGF

SC

URM


PU/PE

CALL PROCESSING

• TWO UNIDIRECTIONAL CONNECTIONS ARE ESTABLISHED IN MCX ON ORDER OF MR VIA GX

• ‘A’ & ‘ B ‘ CAN NOW CONVERSE• CHARGING IS STARTED BY TX - MR RELEASED

CHARGING (METERING)

VC-B

OCB-283EXCH

AND YOUR METER

IS RUNNINGHERE!!!

HARDWARE ARCHITECTURE OF

OCB-283

HARDWARE ARCHITECTURE OF OCB-283

LINK TO TMN

SMA2 TO 64

STS1x3

SMC

SMM

MCX

SMX(1 TO 8)x2

MAS (1 TO 4) A&B

MIS 1 A&B

SMC(2 TO 32)

SMT(1 TO 64)x2

OPERATION &MAINTENANCE TERMINALS CONTROL

TERMINAL

CIRCUITS

VDUTTY

16 LR’S

LR

LR

PCM

CSNL

CSND

CSED

2TO 16

2 TO 4

OCB-283 COMPONENTS• 1. SUBSCRIBER ACCESS UNIT

CSN :- CALLED DIGITAL SUBSCRIBER CENTRE CSN– IT CAN BE LOCAL -> CSNL – OR DISTANT ->CSND

• 2.CIRCUIT TERMINATION UNIT SMT :- CIRCUITS ARE TERMINATED ON TRUNK MULTIPLEX CONNECTION UNIT ITS FUNCTION IS CALLED URM

• 3. COMMON CONTROL UNITS: CALLED MAIN MULTIPROCESSOR

CONTROL STATION SMC , CONTROL UNITS SUPPORT FOLLOWING CONTROL FUNCTIONSMR,TR,TX,MQ,GX,& PC IN SOFTWARE FORM

• 4. AUXILIARY UNITS:- CALLED SMA THESE UNITS SUPPORT

FUNCTIONS FOR SIGNALS & TONES: ETA & PU/PE

OCB-283 COMPONENTS

• 5. SWITCHING MATRIX UNIT • CALLED SWITCHING MATRIX

STATION SMX COMPRISES OF– SWITCHING MATRIX->MCX– SWITCHING SOFTWARE FUNCTION

CALLED -> COM• 6.OPERATION & MAINTENANCE

UNIT SMM :- ITS FUNCTION IS CALLED OM

• 7. COMMUNICATION MULTIPLEX:-THESE ARE MIS & MAS

OCB-283 COMPONENTS

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED

HARDWARE STATIONS OF OCB-283

• CSN : SUBS.ACC UNIT • SMC :MAIN CONTROL

STATION• SMA :AUXILIARY EQPT

CONTROL STATION• SMT :TRUNK CONTROL

STATION• SMX :MATRIX CONTROL

STATION• SMM :MAINTENANCE STATION• STS :SYNCH. TIME BASE• MIS :INTERSTATION

COMM. MULTIPLEX • MAS :STATION ACCESS

COMM. MULTIPLEX

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED


• CSN: SUBS. ACCESS UNIT

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED


• CSN :SUBS.ACC UNIT• SMC :MAIN CONTROL

STATION

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED




CONTROL STATION

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED





STATION• SMX :MATRIX

CONTROL STATIONSMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED


• CSN :SUBS.ACC UNIT • SMC :MAIN CONTROL



STATION• SMX :MATRIX

CONTROL STATION• SMM :MAINTENANCE

STATION

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED





STATION

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED






STATION• SMM :MAINTENANCE

STATION• STS :SYNCH. TIME BASE

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED






STATION• SMM :MAINTENANCE

STATION• STS :SYNCH. TIME BASE• MIS :INTERSTATION

COMM. MULTIPLEX

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED








COMM. MULTIPLEX

SMCSMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED


• CSN : SUBS.ACC UNIT • SMC :MAIN CONTROL






COMM. MULTIPLEX

SMCSMC

SMA

STS

SMC

MCX

SMX

M IS

SMT

OPERATION &MAINTENANCE TERMINALS

CONTROL TERMINAL

CIRCUITS

LINK TO TMN

SMMVDUTTY

PCM

CSNL

CSND

CSED

STANDARD CONFIGURATIONS OF OCB-283

COMPACT (C) CONFIGURATIONSMC : 2 SMA : 2SMT : 1SMX : 1 (48 LR)

SMC CAN BE LOADED WITH MR,TR,TX,MQ,GX &PC SOFTWARE

SMA CAN BE LOADED WITH ETA,PUPE SOFTWARE

PERFORMANCE DATA:- 5 CA/S OR18000 BHCA

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED


SMALL ( P) CONFIGURATIONSMC : 2 +1 BACKUPSMA : 2SMT : 1SMX : 1

SMC CAN BE LOADED WITH MR,TR,TX,MQ,GX &PC SOFTWARE


PERFORMANCE DATA:-36 CA/S OR1,30000 BHCA

SMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED


MEDIUM (M) CONFIGURATIONSMC : 2 OR 3 MR+2=5SMA : 2 OR MORESMT : 1 OR MORESMX : 1 OR MORE

2 SMC’S CAN BE LOADED WITH TR,TX,MQ,GX &PC SOFTWARE



SMC

LINK TO TMN

SMA

STS

SMC

SMM

MCX

SMX

MAS

MIS

SMT


TERMINAL

CIRCUITS

VDUTTY

PCM

CSNL

CSND

CSED


LARGE (G) CONFIGURATIONSMC : 4 TO 7 MR+2

TX+2 SMCSMA : 2 OR MORESMT : 1 OR MORESMX : 1 OR MORE

2 SMC CAN BE LOADED WITH TR,MQ,GX &PC SOFTWARE



SMC

SWITCHING PRINCIPLE AND DESIGN OF

OCB-283

SWITCHING PRINCIPLE

•1.OCB-283 SWITCH WORKS ON 1.OCB-283 SWITCH WORKS ON SINGLE STAGE SINGLE STAGE TIME SWITCHING TIME SWITCHING PRINCIPLE PRINCIPLE

CALLING PARTY’S TIME SLOT X

CALLED PARTY’S TIME SLOT CALLED PARTY’S TIME SLOT

LRE (X)

LRE (Y)

LRS (X)

LRS (Y)

•2. OCB-283 SWITCH PERFORMS SWITCHING IN 2. OCB-283 SWITCH PERFORMS SWITCHING IN TWO PARELLEL SWITCHING EQUIPMENTS TWO PARELLEL SWITCHING EQUIPMENTS SIMULTANEOUSLY FOR EVERY CALLSIMULTANEOUSLY FOR EVERY CALL

INCOMING LINKS OUT GOING LINKS

CALLING PARTY’S TIME SLOT X

Y Y

SINGLE STAGE TIME SWITCH CONCEPT

01

X

64x32-1=2047

01

Y

64x32-1=2047

TS2047 X TS 0INCOMING LINK CARRYING 2048TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTSINLET

OUT LET TS2047 Y TS0

SPEECHBUFFER MEMORY

CONTROL MEMORY

Sequential Write

Controlled Read

Sequential Read

Controlled Write

CONTROLUNIT

X

SPEECH OF X

OUTGOING LINK CARRYING 2048TIME SLOTS OF 64 INTERNAL LINK EACH OF 32 TIME SLOTS

X-->YUNIDIRECTIONAL

X

X

X

Y

SMX-A

SMX-B

CONNECTION UNIT ‘Y’

SAB A

LRE Y(A)

LRS Y(A)

LRE X(A)

LRS X(A)

LRE X(B)

LRS X(B)

LRE Y(B)

LRS Y(B)SAB B

SAB A

SAB B

X

Y

SWITCHING IN OCB-283IN TWO BRANCHES OF SMX

MLCOM

MLCOM

CONNECTION UNIT ‘X’

SMC1 SMC2 SMC3 SMC4 SMC5

SMMA SMMB

SMX 1A

SMX1B

CSNL

SMT SMA1

SMA2

SMA3

0

10123

012

34

5678

MAS 2 (A & B)

MAS 1 (A & B)

MIS A & B

OCB-283DIAGRAM

TOKEN RINGSMIS MAS 1 & MAS 2

GLR( A & B) GLR (A & B)

OCB-283EXCHANGE

TYPICAL OCB-283 EXCHANGE TYPICAL OCB-283 EXCHANGE

PCMS

MAS 2 (A & B)


SMMA SMMB

SMX 1A

SMX1B

CSNL

SMT SMA1

SMA2

SMA3

GLR( A & B)0

1

0123

GLR (A & B)012

34

5678

MIS A & B

OCB-283EXCHANGE


SPEECH PATH IN OCB-283SPEECH PATH IN OCB-283

1 A

2A

8A

1 B

2B

8B

CSNL

SMT

SPEECH PATH IN OCB-283SPEECH PATH IN OCB-283

GLR 1B

GLR 0B

GLR 0A

GLR 1A

GLR B

01

23

GLRA

01

23

GLR OA

GLR OB

SMA

PCM

PCM

SMX

SMX1 GLR =8 LRs

A SW

ITCH

B SW

ITCH

SUBSCRIBER.ACCESS

SWITCHING MATRIX

AUXILIARYEQPT

CIRCUITCONNECTION

EQPT.

NETWORK LINK LR’s (GROUP OF LR’s)

SPEECH PATH IN OCB-283•SPEECH PATH IN OCB-283

CONSISTS OF– SUBSCRIBER ACCESS UNITS CSNs

– TRUNK MULTIPLEX CONNECTION

STATION UNITS SMTs– AUXILIARY EQUIPMENT STATION

UNITS SMAs– SWITCHING MATRIX STATIONS

SMXs– NETWORK LINKS LR’s

SUBSCRIBER ACCESS IN OCB-283

CSNL & CSND CONFIGURATION

OCB-283

SWITCH

CNE CNL

CNL

PCM

256 SUBS.

CSNL

CSND

PCM

CNE

256SUBS

256SUBS

256SUBS

CSN BASIC RACK

CSNBASIC RACK

PCM

TCRMT

GTAUCX1UCX0

TOND

TOND

TCRMT

SUBSCRIBER ACCESS UNITSCSNL OR CSND RACKS

TCRMT

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

TCRMT

TCRMT

TCRMT

CNL OR ICNE

CNL OR ICNE

TCRMT

TCRMT

TCRMT

BASIC RACKBASIC RACK

EXTENSION RACKSEXTENSION RACKS

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

LRLI

NKS

TO

SMX

TCRMT

GTAUCX1UCX0

TOND

TONDTCRMT

SUBSCRIBER ACCESS UNITSCSNL OR CSND RACKS

TCRMT

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

TCRMT

TCRMT

TCRMT

CNL OR ICNE

CNL OR ICNE

TCRMT

TCRMT

TCRMT

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

LRLI

NKS

TO

SMX

TCRMT

GTAUCX1UCX0

TOND

TOND

TCRMT

TCRMT

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

TCRMT

TCRMT

TCRMT

CSN BASIC RACKCSN BASIC RACK

GTAUCX1UCX0

TOND

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

TBALAM

TBUCN

TBABM2

TBABM2

TBABM2

TBABM2

CSNL OR CSND SHELF NAMES BASIC RACKBASIC RACK

TOND

TCRMT

TCRMT

TCRMT

TCRMT

TCRMT

TCRMT

POWERSUPP INTERFACE

INTERFACE WITHEXCHANGE

TCRMT

GTAUCX1UCX0

TOND

TOND

TCRMT

TCRMT

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

TCRMT

TCRMT

TCRMT

CSN BASIC RACKCSN BASIC RACKFOR FOR CSNLCSNL

SUBS. CONNECTIONSHELFS

AUX. EQPT

CONTROL LOGICS

PCMPCM

GLR TO SMX A

GLR 0&1(B)GLR 0&1(B)GLR0 &1(A)GLR0 &1(A)

1 GLR= 8 LRSTWO GLR/CSN

CNECNE

GLR TO SMX B

CSN HARDWARE CONFIGURATION

DIGITAL CONTROL UNITDIGITAL CONTROL UNIT UCNUCN

IN CASE OF CSNLTCILR

IN CASE OF CSNLTCBTL

UCX0 UCX1

TCCS

TCCS

TPUCB

TMUC2M

TMQR

TRCX

TRCX

TRCX T

SUC

TRCX

TRCX

TMQR

TMUC2M

TPUCB

TCCS

TCCS

THLR

THLR

TRF8B

*

TRF8B

*

TFILMB

*

TRCX

TTRS0

TTRS2

TTRS1TTRS3

T TRS13 12 9 8 5 4TTRS15 14 11 10 7 6

TCCOB

TOND 80 (0)

TOND 80 (1)

~40 V

~ 40 V

TBTD

B

TBTD

A

TPOS

TCRMT

TCRMT

TSURV2

TSURV2

TSURV2

TSURV2

TCRMT

T5V17

T5V17

GTA

TMLAB

CSND BASICRACK

TBALAN

TBUCN

* PCB’S NOT USED INCSNL

TCRMT

GTAUCX1UCX0

TOND

TOND

TCRMT

TCRMT

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

TCRMT

TCRMT

TCRMT

CSN BASIC RACKCSN BASIC RACKFOR FOR CSNDCSND

SUBS. CONNECTIONSHELFS

AUX. EQPT

CONTROL LOGICS

PCMPCM

1 GLR= 8 LRSTWO GLR/CSN

CNECNE

2 ~ 16 PCMSTOWARDS EXCHANGE

CSN EXTENSIONCSN EXTENSIONRACKRACK

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

PCMPCMCNECNE

LOCALSUBSS. CONCENTRATOR

REMOTESUBSS. CONCENTRATOR

INTERFACE

REMOTESUBS.CONN.

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

CNL OR ICNE

EXPANDED VIEW OF EXPANDED VIEW OF C N L SHELFC N L SHELF

TABA

TABA1

TABA

TABA

TABA0

TPOL

TABA

THLR

THLR

TABA15

TCRMT

TABA

TABA

TABA

TABA

CN CN :- :- DIGITAL SUBS. CONCENTRATORDIGITAL SUBS. CONCENTRATORMAXIMUM 256 SUBS./SHELFMAXIMUM 256 SUBS./SHELF

SUBSCRIBER CARDSSUBSCRIBER CARDS16 SUBS / CARD16 SUBS / CARDMAX. 16 CARDSMAX. 16 CARDS

DETAILS OF CN SHELFDETAILS OF CN SHELF

TCRMT

TPOL

THLR

THLR

TABA

TABA

•SWITCHING MATRIX SYSTEM CONSISTS–HOST SWITCHING MATRIX MCX IN SMX

* MCX PROVIDES:-

•16 BIT DIGITAL SWITCHING• MATRIX OF 2048 x 2048 LR’S

–IT HOLDS THE MLCOM SOFTWARE •SMX GETS 4.096 MBITS/S MATRIX LINKS (LRs) IN THE FORM OF GROUP OF 8 LRs CALLED GLR •SWITCHING IN IS DONE SIMULTANEOUSLY IN TWO BRANCHES (A & B) OF INDEPENDENT SWITCHES

•BRANCH AMPLIFICATION & SELECTION FUNCTION SAB FOR CONNECTING LR s TO SMXs OF RESPECTIVE BRANCH IS SITUATED IN CONNECTION UNITS

•THERE ARE 8 MODULAR SWITHES CALLED SMX1 TO SMX8 IN EACH BRANCH

SWITCHING MATRIX STATION : SMX

SWITCHING MATRIX SCHEMETIC

• SINGLE STAGE TIME SWITCHING• SWITCHING CAPACITY-2048 LR’S• 1 LR IS 32 CHANNEL PCM - 30 USED

FOR VOICE1

2

3

4

5

6

7

8

LR0LR255

COM

LR0LR255

LR 2047LR 2047

.T.

LRE 0

LRE 255

LR E 256

LRE 511

LRE 512

LRE 767

LRE 768

LRE 1023

LRS 0

LRS 255

LRS 256

LRS 511

LRS 512

LRS 767

LRS 768

LRS 1023

256x256 SQUARE MATRICES256x256 SQUARE MATRICES

SWITCHING MATRIX BLOCK DIAGRAM SWITCHING MATRIX BLOCK DIAGRAM

SMX 1

SMX 2

SMX 3

SMX 4

0~63 I/L

64~127

128~191

192~255

64x64

0~63 O/L

64~127 O/L

128~191 O/L

192~255 O/L

256x256 SQUARE MATRIX

EXPANDED VIEW

64 x64 BASIC

SQUARE MATRIX

SWITCHING FROM X-Y

01

X

64x32-1=2047

01

y

64x32-1=2047

TS2047 X TS 0I/C LINK CARRYING 2048TIME SLOTS OF 64 LRE LINKEACH OF 32 TIME SLOTS

INLET

OUT LET TS2047 Y TS0

SPEECHBUFFER MEMORY

CONTROL MEMORY

W

R

R

W

CONTROLUNIT

X

SPEECH OF X

SWITCHING FROM Y-X

01

Y

64x32-1=2047

01

X

64x32-1=2047

TS2047 Y TS 0I/C LINK CARRYING 2048TIME SLOTS OF 64 LRE LINKEACH OF 32 TIME SLOTS

INLET

OUT LET TS2047 X TS0

SPEECHBUFFER MEMORY

CONTROL MEMORY

W

R

R

W

CONTROLUNIT

Y

SPEECH OF Y

TWO WAY SWITCHING OF TIME SLOTS OF X->Y & Y->X IN SINGLE STAGE TIME SWITCH OF OCB-283

SWITCH OF Y

BASIC 64x64 SQUARE MATRIXCORRESPONDING TO LRE OF X

SWITCH OF X

BASIC 64x64 SQUARE MATRIXCORRESPONDING TO LRE OF Y

SMX 1 SMX 3 SMX 5 SMX 7

SMX 1

SMX 2

SMX 1 (EX)

SMX 2 (EX)

SMX 3

SMX 4

SMX2 (EX)

SMX 4 (EX)

SMX5

SMX6

SMX 5 (EX)

SMX 6 (EX)

SMX 7

SMX 8

SMX 7 (EX)

SMX 8 (EX)

B BRANCHB BRANCH

A BRANCHA BRANCH

SWITCHING RACKS OF OCB-283 (FOR 1024 LRS )4 SMX SWITCHES IN EACH BRANCH

AUXILIARY EQUIPMENT UNITS: SMA

• SMA IS THE HARDWARE STATION WHICH SUPPORTS AUXILIARY EQUIPMENT FUNCTIONS -(DOING FOLLOWING JOBS)

1. ETA :PROVIDES TONES : FREQUENCY SENDER & RECEIEVER : FIRST TWO SMA KEEP EXCHANGE CLOCK

2. PUPE :HANDLES COMMON CHANNEL SIGNALING CCS7 PROTOCOLS OF COMMON CHANNEL SIGNAL DATA LINKS .

• IN PHYSICAL FORM ONE SMAOCCUPIES ONLY ONE SHELF OFA RACK• SMA IS CONNECTED TO SWITCHING MATRIX BY ONE GLR (= 8 LR’s) • THESE LR’s :-

CARRY TONE,FREQUENCY RECEIEVER / SENDER,CONFERENCE CIRCUIT TIME SLOTS FOR ETA &

CARRY COMMON CHANNEL SIGNALING TIME SLOTS FROM THE MATRIX (COMING ON DATA LINKS ESTABLISHED IN MATRIX ) TO PUPE• SMA IS CONNECTED ON MAS COMMUNICATION MULTIPLEX FOR COMMAND CONTROL

SMASMA SHELFSHELF

SMA : AUXILIARY EQPT. STATIONSMA : AUXILIARY EQPT. STATION IN OCB-283IN OCB-283

SMC

SMC

SMA

SMC

SMA

TRUNK MULTIPLEX CONTROL STATION : SMT

• SMT IS THE HARDWARE STATION WHERE THEEXTERNAL PCMS ARE TERMINATED

• SMT HARDWARE IS FULLY DUPLICATED IN TWO LOGICS

• IT OCCUPIES TWO SHELVES OF A RACKS

• THERE ARE TWO GENERATIONS OF SMT’s

– SMT 1G CAN CATER TO 32 PCMS

– SMT 2G CAN CATER TO 128 PCMS

SMC

SMT(A)

SMT(B)PCMTERMINATIO

ON

CONNECTING OF AUTOMATIC DIGITAL ANNOUNCEMENT IN OCB-283

• AUTOMATIC ANNOUNCEMENTS ARE PROVIDED IN OCB-283 AT THE SWITCHING MATRIX IN THE FORM OF DIGITAL RECORDED VOICE MESSAGES STORED IN PCB’s

• THERE ARE TWO PCB’s :- ICMPN2 ->RAM & VOLATILE MEMORY ICSMP ->EPROM SAVES VOICE-ANN. ( DIGITAL )

• THESE TWO CARDS ARE SITUATED IN SMM RACK & THE ANNOUNCEMENTS ARE CARRIED BY ONE PCM LINK FROM ICMPN 2 CONNECTED TO ONE SMT; FROM SMT LINK GOES AS LR LINK TO SMX WHERE ITS TIME SLOTS ARE USED FOR GETTING THE RESPECTIVE ANNOUNCEMENTS.

SMM RACK

SMT

SMT

SMT RACK

PCM

PCMDDF

SMX RACK

LR LINKS


SMMA SMMB

SM

CSNL

SMT

0

1

0123

01

34

MIS A & B

OCB-283DIAGRAM



OCB-283EXCHANGE

PCMS

OCB-283 BLOCK DIAGRAM

CONTROL STATIONS OF OCB-283

MAIN MAIN MULTI PROCESSORMULTI PROCESSOR

CONTROLCONTROLSTATIONS :SMCSTATIONS :SMC

MAIN CONTROL STATION: SMC

SMC IS THE HARDWARE STATION FOR LOADING COMMON CONTROL FUNCTIONS MR,TR,MQMR,TR,MQTX,GX, & PC TX,GX, & PC IN SOFTWARE FORMIN SOFTWARE FORM

IN PHYSICAL FORM ONE SMC IN PHYSICAL FORM ONE SMC OCCUPIES ONLYOCCUPIES ONLY ONE SHELF ONE SHELF OFOFA RACK A RACK

SMA

SMA

SMC

SMC

SMC

SMMA SMMB

SMC1 SMC2 SMC

SMX 1A

SMX1B

CSNL

SMT SMA1

SMA2

SMA3

0

1

0123

012

34

5678

MAS 2 (A & B)

MAS 1

MIS A & B


PCMS

OCB-283 BLOCK DIAGRAM

MAINTENANCE STATIONS OF OCB-283

MAINTENANCEMAINTENANCESTATIONSSTATIONSSMM A&BSMM A&B

MAINTENANCE STAIONS SMM(A) & SMM(B)

• SMM STATION IN OCB-283 PERFORMS THE O&M FUNCTIONS

• THE SMM STATION HAS FULL DUPLICATED HARDWARES SMM (A) & (B)

• ONE OF THE TWO SMM IS PILOT & OTHER WORKS AS HOT STAND-BYE

• FOR BOTH SMM THERE ARE TWO MIRROR IMAGE HARD DISKS OF 1200 MB CAPACITY- PILOT IS ABLE TO ACCESS EITHER OF DISKS

• THERE ARE TERMINATIONS FOR PERIPHERALS TTY,VDU FOR OPERATION

• THERE ARE UPTO 4 ALARM RECEPTION RINGS

• SMM DIALOGUES WITH ALL SMC’S OVER MIS TOKEN RING

• ADJACENT TO SMM THERE IS ONE MAG-TAPE DRIVE UNIT : DBM

• THERE IS ONE STREAMER FOR CARTRIDGE DRIVE IN SMM RACK

• SMM RECEIVES ALL ALARMS FROM WHOLE EXCHANGE ON ALARM RING MAL

• SMM STATION OCCUPIES 3 SHELVES OF A RACK

• SMM RACK ALSO HAS DIGITAL VOICE ANNOUNCEMENT SYSTEM IN 4TH SHELF


• SMM A&B ALONGWITH ALARM RING & ANNOUNCEMENT CARDS OCCUPIES THREE SHELVES OF A RACK

• SMM RACK ALSO KEEPS STS EQPT.

• DBM RACK IS INSTALLED ADJACENT TO THIS


ALARMS ANNOUNCE PERIPH

DISK 2

DISK 1SMM A

SMMB

STS


SMMA SMMB

SMX 1A

SMX1B

CSNL

SMT SMA1

SMA2

SMA3

0

1

0123

012

34

5678

MAS 2 (A & B)

MAS 1 (A & B)

MIS A & B

OCB-283DIAGRAM



MAL

PCMS

MIS

MAS

MAS MAS : : MAS CAN BE FROM 0 TO 4 RINGS & ARE DUPLICATED AS A & BMAS CAN BE FROM 0 TO 4 RINGS & ARE DUPLICATED AS A & B

MIS MIS : : MIS IS ONE RING DUPLICATED AS A & BMIS IS ONE RING DUPLICATED AS A & B

MAL :MAL : ALARM RINGS CAN BE UPTO 5 AND DUPLICATED AS A & BALARM RINGS CAN BE UPTO 5 AND DUPLICATED AS A & B

COMMUNICATION MULTIPLEXESCOMMUNICATION MULTIPLEXES

COMMUNICATION MULTIPLEXES

• COMMUNICATION MULTIPLEXES ARE THE HIGHWAYS OF COMMUNICATION BETWEEN VARIOUS CONTROL STATIONS OF OCB-283

• THERE ARE THREE TYPE OF COMMUNICATION MULTIPLEXES:

– MAS TOKEN RING :-STATION ACCESS MULTIPLEX ,IT IS BETWEEN

• CONNECTION STATIONS (EXCEPT CSN) AND ALL SMC’s

• SWITCHING STATIONS AND ALL SMC’s

– MIS TOKEN RING :- INTERSTATION MULTIPLEX, IT IS BETWEEN ALL SMC’s AND SMM

– MAL RING :-ALARM MULTIPLEX RING, IT IS FOR COLLECTING H/W ALARMS OF ALL STATIONS EXCEPT CSN

• NOTE:- ALL COMMUNICATION BETWEEN CSN & REST OF THE

EXCHANGE EQUIPMENTS IS DONE VIA COMMON SIGNALING CHANNELS CALLED COC:-COC0= (TS16-LR0 )& COC1=(TS16-LR1)

PCWAMPCWAM• PCWAM : PERSONAL

COMPUTER WORK ACCESS METHOD

• IT IS A SPECIAL SOFTWARE LOADED IBM PC

• IT IS THE TERMINAL OF SMM WHICH IS CONNECTED TO S-BUS OF SMM DIRECTLY

• IT IS USED FOR HARDWARE TESTING/LOCAVAR OF SMM COMPONENTS : SMM STATION,HARD DISK,MAGTAPE

SMM

CONTROL TERMINAL

PC WAM

MIS

PC WAM

PGS / T IPGS / T I

• PGS / T I : GENERAL VISUAL DISPLAY CUM INTELLIGENT TERMINAL

• IT IS A SPECIAL SOFTWARE LOADED IBM PC

• IT IS ONE OF THE PERIPHERAL TERMINAL OF SMM WORKING ON ASYNC.LINE FOR O&M

• IT SHOWS THE GENERAL DISPLAY OF ALARMS IN EXCHANGE

• IT PROVIDES ASSISTANCE IN MAN-MACHINE COMMANDS IN TI:INTELLIGENT MODE

SMM

CONTROL TERMINAL

MIS

PGS/TI

CONTROL TERMINALSCONTROL TERMINALS

CONTROL TERMINASL• THESE ARE SYSTEM VIDEO

TERMINALS CONNECTED TO SMM

• THESE ARE USED FOR MANUAL RESTART & STOPPING OF SMM

• THESE INTERACT DIRECTLY WITH ‘REAL TIME OPERATING SYSTEM’ OF SMM COMPUTER

SMM

CONTROL TERMINAL

MIS

OPERATORS VDU TERMINALSOPERATORS VDU TERMINALS

OPERATORS TERMINASL• THESE ARE ORDINARY

VIDEO TERMINALS CONNECTED TO SMM ON

LAS LINKS

• THESE ARE USED BY THE OPERATORS FOR GIVNING MA-MACHINE COMMANDS FOR NAORMAL OPERATION & MAINTENANCE OF THE OCB-283 EXCHANGE

• THESE ARE PROVIDED WITH A ORINTER FOR TAKING THE HARD COPY

• UPTO 32 OPERATORS TERMINALS CAN BE PROVIDED IN A EXCHANGE

SMM

CONTROL TERMINAL

MIS

VDU PRINTER


SMMA SMMB

SMX 1A

SMX1B

CSNL

SMT SMA1

SMA2

SMA3

GLRA & B

0

1

0123

GLRA & B

012

34

5678

MAS 2 (A & B)

MAS 1 (A & B)

MIS A & B

OCB-283DIAGRAM


MAINTENANCE COMMANDSHARDWARE EQUIPMENT’S STATUS INTERROGATION

@ ESMIN:@ AM=SMC;OR @ AM=SMCx;OR @ ; OR

@ TELIN:@ AFUR=1<63;

@ ESMIN:@ AM=SMT;OR@ AM=SMTx;OR@ AM=SMTAx;OR AM=SMTBx;

@ ESMIN:@AM=SMA;OR AM=SMAx;

@ AM=SMM;OR SMMA; OR SMMB;

@ ESMIN:@ AM=SMX;OR AM=SMXn;OR AM=SMXAn;OR AM=SMXBn;

@ AMXIL:@ AMX=MIS; OR AMX=MAS;OR AMX= MISAOR AMX=MISBOR AMX=MASAn;OR AMX=MASBn;

SMX1 ( A &B)

SMX8 ( A &B)

CSNn

AFUR=n

SMAnSMAnAM=SMAnAM=SMAn

SMTnSMTnAM=SMTnAM=SMTn

AFGRU=UR-GLR

AFGRU=n-0

AFGRU=n-1

AFGRA=n-0

AFGRT=n-0

AFGRT=n-1

AFGRT=n-2

AFGRT=n-3

0123

31

AFGRX=SMX-GLR

AFGRX=1-2

AFGRX=1-3AFGRX=1-15

AFGRX=1-29

AFGRX=2-8

AFGRX=3-3

CONNECTION OF LR’s IN THE FORM OF GROUP OF LR’s-> GLR TO SWITCHING MATRIX STATION SMX

AFGRA=SMA-GLR

AFGRT= SMT-GLR

ADDRESSING OF GLR ‘s WITH RESPECT TO CONNECTION UNITS & WRT TO SMX IN OCB-283 SOFTWARE

AFGRX=2-11 SMX2 ( A &B)

SMX3 ( A &B)

PCM

OCB-283 SWITCHING SUBSYSTEM

PROTECTION OF CONNECTIONS IN SPEECH PATH

1. CHECKING OF CONNECTIONS : *THERE ARE TWO TYPES OF CHECKS

- PERMANENT CHECK -> ->ALWAYS ACTIVE FOR ALL CHANNELS- CHECK ON REQUEST ->

-> ACTIVATED ON DEMANDCONCERNS TO ONLY LIMITED CHANNELS

*METHODS OF CHECKING

CHECK BY TRANSMISSION CHECKCOMPARISON OF IN EACH BRANCHBRANCHES SEPARATELY

SIMPLE SOPHISTICATEDMEANS:- PARITY PARITY CRC TYPE :- PERMANENT PERMANENT ON REQUEST

SMX

SWITCHING IN OCB-283 DEFINITION OF ADDITIONAL BITS IN SAB FUNCTION

8 9 10 11 12 13 14 15

TSi

8 SPEECH BITS 8 SP 8 ADDSAB

LAE LASCONNECTION UNIT LRS A&B

TSi3.9 mics 3.9 mics

8 SPEECH BITS

PERMANENT MODE MULTIFRAME MODEBIT 13 =0 BIT 13=1 (SYNC WORD)BIT 14=0 (HOMOLOGOUS RESULT BIT 14=CONTROL BITOF LRS A&B TSi ON LRE-TSi :IF NOT,=1)BIT 15= PARITY BIT 15= CRC BIT

ADDITIONAL BITS

ADDITIONAL 8 BITS

0 1 2 3 4 5 6 7

LRE A&B

MODES OF OPERATION

PHYSICAL DIMENSIONS OF OCB-283PHYSICAL DIMENSIONS OF OCB-283

Rack Size in : 2000 Hx 950 Wx 690 D (mm)

No of Rows (Suits) in a Switch Room : Not Fixed

No of Racks per suite : Not Fixed but for practical convenience may be limited upto 16

Inter Suite Gap : Min. 800 mm to 1000 mm Max:- Variable

Clearance from Sidewalls : 1500 mm

Height of Ceiling Minimum : 3000 mm

Approximate floor area for a 6k exchange : 44 sq m

Sequence of lay out of racks in suites :

No special sequence or restriction (other than specific to site) except for following

CA & DBM racks to be installed together preferably in middle of Suites of racks

XA Racks to be installed in continuity & in Identical locations in two suites for the branches A & B

OCB-283 RACKS - Front View

UB

SMC

SMT-A

SMT-B

SMA

SMA

1 SMC+1 SMT+2 SMA

UC

SMC

SMA

SMA

SMA

SMA

1SMC+ 4 SMA

CSN-BASIC

CNL0

CNL1

CNL2

CNL3

UCN+ 4 CNL(ICNE)

UCN

CSN-EXTN.

CNL5

CNL6

CNL7

CNL8

5 CNL(ICNE)

CNL4

UD

SMC

SMT-A

SMT-B

SMT-A

SMT-B

1SMC+ 2 SMT’s

CB

SMC

SMC

SMC

SMA

SMA

3 SMC + 2 SMA

UA

SMC

SMT-A

SMT-B

SMT-A

SMT-B

1 SMC+ 2 SMT’s

XA

SMX1

SMX2

SMX E

SMX E

Only SMX’s

CA

1 SMC +STS+SMMA/B

SMC

STS

SMMA

AL ANN PER

SMMB

DBM

MTU

CC

SMC

SMC

SMC

SMC

SMC

5 SMCs

2000mm

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

TR07

TR06

TR05

TR04 CSN030

CSN031

CSN040

CSN041

CSN050

CSN051

CSN060

CSN061

XA2BXA1BUC2UD1CSN010

CSN011

XA2AXA1ACB1SDE1UC1CADBM

CSN020

CSN021

UE1

LAY OUT OF AN OCB-283 SWITCH ROOM

EXAMPLE :-BOMBAY SION TELEPHONE EXCHANGE

VDU

OPERATION ROOM

SWITCH ROOM ALL DIMENSIONS IN MM

VDU VDU VDU

950

690

800

1500

IRP

ACDB

CONNECTION UNITS’ UR DESIGNATION NUMBERING IN OCB-283

TYPE OF CONN.UNIT S/W MACHINE RANGE OF UR NO.S

CSN MLCSN 1TO 63 1 UR PER CSN

SMT MLURM 223 TO 64 STARTING FROM HIGHEST 8 MODULE OR UR NO PER SMTUR NO FOR FIRST MODULE FOR SMT 1G & OF FIRST SMT 32 MOD. OR UR PER SMT-2G

SMA MLETA/ 256 TO 224MLPUPE 1 UR NO PER SMA

1 2 3 4 63 64 223 224 256

CSN 1~63 SMT 1SMT20SMA1

UR NUMBERING SCALE UR #

SMA32

DIMENSIONING OF OCB-283

• CALCULATING LR ‘sCALCULATING LR ‘sMODULARITY OF LR’s (30 voice channel carrying links)

Minimum 8 LRs called GLR can be installedTYPE OF CONN. UNIT LR REQUIRED GLRS

CSNL 16 2SMT 1G 32 4SMT 2G 128 16SMA 8 1

Calculate based upon Total Subscriber Number & TRAFFIC PER LINE the No of CSNL racks required & GLRs

Calculate based upon the projected circuit traffic the total No of Circuits needed & Calculate No of SMTs & GLRs

Calculate based upon the projected Signalling traffic the total No of RF & PUPE needed & Calculate No of SMAs & GLRs

• CALCULATING SWITCHING MATRIX SIZECALCULATING SWITCHING MATRIX SIZEMODULARITY OF SMX

SMX :- Maximum 256 LRs or 32 GLRs/SMXXA RACK:- 2 SMX STATIONS/ XA RACKRCID CARD SLOTS PER XA RACK =32

TOTAL NO OF SMX STATIONS REQUIRED = TOTAL GLRs/32

TOTAL NO OF XA RACKS NEEDED =TOTAL SMXs/2WITHIN SMX MODULARITY OF :-

RCID CARD 16 LRs or 2 GLRsRCMT CARD 64 LRs or 8 GLRsRCSM CARD 4 PER SMX (IN STEPS OF 1

RCSM/ PAIR OF RCSM FROM RCMT0 TO RCMT7 )IF GLRs >128 THEN MORE THAN 16 RCMT NEEDED AND SECOND SHELF OF EACH SMX WILL BE USED

WITH MORE RCMT’s & RCSMs CARDS AS PER SIZE + 1 RCMP


• CALCULATING SMA CALCULATING SMA MODULARITY OF SMA MINIMUM 2 SMA -> SMA 1 & SMA 2 ( ALWAYS NEEDED)

NO OF SMA NEEDED DEPENDS UPON

• NO OF ETAs REQUIRED• NO OF PUPEs REQUIRED

– ETA REQUIREMENT DEPENDS UPON – TOTAL RF (RGF) CIRCUITS REQUIRED– TOTAL CCF CIRCUITS REQUIRED

ICTSH CARD PROVIDES 8 RGF/CARD OR 8 CCF /CARD :

IN SMA 1 & 2 UPTO 7 ICTSH OF RGF TYPE & 1 ICTSH OF CCF TYPE

& IN OTHER SMAS 8 ICTSH OF RGF TYPE & 2 ICTSH OF CCF TYPE CAN BE INSTALLED.

– PUPE REQUIREMENT DEPENDS UPON – TOTAL NO OF CCS7 DATA LINKS TO BE TERMINATED

ACHIL CARD PROVIDES FOR 16 CCS7 DATA LINKS PER CARD

ONE SMA HOLDS MAXIMUM 2 ACHIL CARD GIVING 1 PUPE

ONE PUPE IS KEPT SPARE AS STANDBYE


• CALCULATION OF SMCs CALCULATION OF SMCs • SMCs ARE CALCULATED BASED UPON THE TOTAL PROJECTED TRAFFIC OF

THE EXCHANGE BASED UPON THE SPECIFIC TRAFFIC DATA OF THE AREA OF THE EXCHANGE & THE CONFIGURATION OF THE EXCHANGE REQUIRED:

• SMC’S ARE THE H/W STATION SUPPORTING THE S/W LOGICAL MACHINES ‘ML’ OF COMMON CONTROL FUNCTIONS OF EXCHANGE :-

ML -> MR TR TX MQ GX & PC

• THESE LOGICAL MACHINES ‘ML’ ARE LOADED EITHER INDIVIDUALLY OR IN DEFINITE COMBINATIONS OF ‘ML’s IN SMC’S.

• THE SIZE OF THE FILES OF FOLLOWING MLs IS FIXED & THE FUNCTIONS OF THESE ‘ML’s ARE DUPLICATED ; (ONLY TWO OF EACH TYPE )

– MLMQ,MLGX & MLPC• THE SIZE OF FILES OF FOLLOWING ML’s DEPENDS UPON THE TOTAL NUMBER

OF SUBSCRIBERS & TOTAL CIRCUITS & THESE ML’S FUNCTIONS ARE ALSO ONLY DUPLICATED ;

– MLTR & MLTX• THE SIZE OF MLTX ALSO DEPENDS UPON TOTAL ERLANGE TRAFFIC TO BE

HANDLED BECAUSE IT PROVIDES THE CHARGING REGISTERS WHICH HANDLE THE CALLS DURING THE CONVERSATION PHASE OF CALLS (1 REGISTER/CALL)

– EACH MLTX HOLDS MACROPROGRAMME MEMORIES IN BLOCKS ; BLOCKS CAN BE MINIMUM 1 TO MAX. 4

– EACH BLOCK GIVES 2000 (OR 3000) CHARGING REGISTERS


DIMENSIONING OF OCB-283• CALCULATION OF SMCs CALCULATION OF SMCs (CONTD ->)

• THE MLMR IS THE LOGICAL MACHINE WHICH IS THE OVERALL CONTROLLER OF THE CALL,HENCE

– IT IS ACTIVE FOR THE LONGEST DURATION DURING PROCESSING , ANALYSIS & SELECTION & SETUP / RELEASE OF CALLS ;

– THIS IS THE MACHINE WHICH IS REQUIRED TO WORK WITH EVERY EVENT OF THE SUBSCRIBERS/ CIRSUITS DURING SETUP & RELASE .

• MLMR’s CAN BE MINMUM 2 & MAXIMUM 7 ,& EACH MLMR FUNCTION HANDLES UPTO 1016 SIMULTANEOUS CALLS INDEPENDENTLY & ITS MEMEORIES ARE NOT DUPLICATED

• AN MLMR CAN HAVE 1 TO 4 BLOCKS OF MACRO-PROGRAMME MEMORIES ; EACH BLOCK HOLDS 256 CALL HANDLING REGISTERS , HENCE MAXIMUM REGISTERS PER MLMR =1024 ;

• 2 REGISTERS PER BLOCK OF MACRO-PROGRAMME DO NOT HANDLE CALLS HENCE NET AVAILABLE REG./BLOCK=254

• MAXIMUM REGISTERS / MLMR=1016 AVAILABLE FOR HANDLING CALLS

• DEPENDING UPON THE TOTAL EXCHANGE’S PROJECTED TRAFFIC & BHCA ( CALLING RATE OF ALL SUBS./CKTS) ; THE TOTAL NUMBER OF REGISTERS REQUIRED IS ESTIMATED.

• DEPENDING UPON NO. OF REGISTERS REQUIRED - THE ACTUAL MEMEORY SIZE OF MLMR IS OBTAINED & THEN THE NO. OF MLMR’s NEEDED IS DECIDED.

• MLMR IS HAVING THE LOWEST TRAFFIC HANDLING CAPACITY ,HENCE IT IS THE MOST CRITICAL COMMON CONTROL FUNCTION IN EXCHANGE

• CALCULATION OF SMCs CALCULATION OF SMCs (CONTD ->)

• LOGICAL MACHINES ARE LOADABLE IN SMC’s IN COMBINATIONS SHOWN IN TABLE -1 & THIS GIVES TRAFFIC HANDLING CAPACITIY OF SMC’S FOR SUCH COMBINATIONS .

• DEPENDING UPON REQUIRED TRAFFIC HANDLING CAPACITY THE NUMBER OF MLMR’s & THE RIGHT COMBINATIONS OF ML’s IS TO BE SELECTED.

• MAXIMUM MEMEORY SIZE OF AN SMC IS = 36 MB THEREFORE IF IN THE EXISTING COMBINATIONS, IF THE SIZE OF ANY ‘ML’ INCREASES DUE TO INCREASE IN SIZE OF EXCHANGE EQPTS., OR IN TRAFFIC , THEN ADDITIONAL SMC’s MAY BE REQUIRED TO DE-COMBINE THE ‘ ML’s.

• NORMALLY IN A MEDIUM SIZE EXCHANGE OF 10 K TO 20 K LINES & (PROPORTIONATE NO. OF CIRCUITS) THERE ARE 5 SMC’S WHICH HOLD THE ML’s AS FOLLOWS;

– 2 SMC’s WITH ->MLMQ,MLTR,MLTX,MLGX,MLPC

– 2 SMC’s EXCLUSIVELY FOR - > MLMR1 & MLMR2

– 1 SMC AS RESERVE OR STANDBYE

• AS THE NUMBER OF SUBSCRIBERS & CIRCUITS INCREASES OR AS THE TOTAL TRAFFIC INCREASES THERE WILL BE CORRESPONDING NEED OF INCREASE IN SIZE OF MLTR OR MLTX OR BOTH ; THEREFORE ACCORDINGLY, AFTER CALCULATING THE SIZE OF MEMEORIES OF THESE ML’s IT MAY BE REQUIRED TO SHIFT THESE ML’s IN EXCLUSIVE SMC’s OF THEIR OWN.

• FOR CALCULATING THE MLMR & MLTX REGISTERS THE EMPIRICAL FIGURES OF HANDLING & PROCESSING TIME etc. CAN BE TAKEN FROM THOSE CORRESPONDING TO MR & TX REGISTERS OF E-10B

• FOR CALCULATING SIZE OF MLTR MEMEORY THE EXISTING SIZE OF MLTR MAY BE TAKEN & PROPORTIONATE INCREASE MAY BE INCORPORATED

TABLE -1 :- TRAFFIC HANDLING CAPACITIES OF SMC’S

COMBINATION OF ML’s TRFC. HANDLING CAP. MIN. NO & MAX.

OR FUNCTIONS IN SMC CALL ATT./SECOND/SMC NO OF SUCH SMCS

1.MR,MQ,TR,TX,GX,PC 18 CA/S 2 - 2

2.MQ,GX,TR,TX,PC 50 CA/S 2 - 2

3.MQ,GX,PC 110 CA/S 2 - 2

4.TR 110 CA/S 2 - 2

5.TX 110 CA/S 2 - 2

6.MR 36 CA/S 2 - 7

Standard Configurations of OCB-283 ExchangesCONFIGURATION OF COMBINATION OF NO OF SMC’S TRAFFIC HANDL-

EXCHANGE. MLS IN SMC OF THIS TYPE -ING CAP. OF EXCH.

COMPACT C MR,TR,TX,MQ,GX,PC 2 ONLY 5 CA/S OR 18000

CA/H SMALL P MR,TR,TX,MQ,GX,PC 2 + 1 RES 36 CA/S OR 130000 CA/H

MEDIUM M TR,TX,MQ,GX,PC 2 100 CA/SOR 360000 CA/H

M R 2 ~3 +1 RES

LARGE G TR,MQ,GX,PC 2 220 CA/S OR 800000

CA/H MR 4 TO 7 +1 RES

TX 2

POWER DISTRIBUTION & CONSUMPTION IN POWER DISTRIBUTION & CONSUMPTION IN OCB-283OCB-283

EXCHANGE GETS POWER FROM -48 V TRIPPLED DC POWER SUPPLY ON CABLES PROVIDED UPTO

SDE RACK INSTALLED IN ONE OF TH E ROW

FROM SDE THE DC SUPPLY IS DISTRIBUTED FROM RESPECTIVE FUSES TO CONCERNED RACKS :

TOTAL CURRENT CONSUMTION OF A TYPICAL OCB-283 EXCHANGE OF 20 K LINES IS APPROXIMATELY = 140 A

CURRENT REQUIREMENT OF VARIOUS STATIONS IS GIVEN BELOW

CURRENT CONSUMTION INCREASES WITH INCREASE IN SUBSCRIBER & TRAFFIC

STATION CURRENT AT 5 V AT 48V

SMC 32 A 4 A

SMA 24 A 3 A

SMX

SMT1G 34 A 4.5 A

SMT2G

SMM

CSN B

CSN E

SDE RACK

FUSES

-48V

0 V

EXC

AH

NG

E

EAR

TH

ACTIVITY DAYS01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

MARKINGTILE CUTTING

BASE PLATE FIXINGRACK FIXING AND ALIGNMENT

FIXING DCDB, ACDB, IRP, ALARM BOXLAYING DCDB TO SDE POWER CABLE

LAYING O/P CABLE TO DCDB POWER CABLELAYING SDE TO RACK ENERGY CABLES

INTER RACKS AND INTER CSNL CABLINGSMM TO IRP CABLES

ACDB TO PERIPHERALS POWER CABLESIRP TO PERIPHERALS SIGNAL CABLES

PCM CABLE LAYING AND LACING

PCM CABLE PREPARATION (BOTH SIDES)

PCM CABLE TERMINATION (BOTH SIDES)

BUZZING PCM CABLE

ALARM CABLE LAYING AND TERMINATION

SUBS CABLE LAYING AND LACING

SUBS CABLE PREPARATION (BOTH SIDES)

SUBS CABLE TERMINATION (BOTH SIDES)

SUBS CABLE BUZZING AND FAULT CLEARING

A-B WIRE CHECK AND FAULT CLEARANCE

LOCAVAR

ALARM TESTING

SMM TEST

JUNCTION DATA VERIFICATION AND TEST

SUBSCRIBER DATA TEST

JUNCTION THROUGH TESTS

FSQ TEST

CHART OF INSTALLATION ACTIVITIES OF A MEDIUM SIZE OCB-283 EXCHNAGEIN DAYS

THE CONCEPT OF MODERN COMMUNICATION

ISDN :

YOR ARE HERE IN SOUTH AMERICA

ON VACATIONS AT BEACH WITH YOUR LAPTOP MOBILE

COMPUTER /COMMUNICATOR

WASHING MACHINE

INTERACTIVE SATTELLITE & CABLE TV SERVICES WILL

BE CONTROLLED BY HOME COMPUTER

TVOVEN

YOUR COMPUTER WILL TALK TO

ELECTRICITY AUTHORITIES TO DECIDE WHEN

TO PUT ON THE WASHING MACHINES

YOU CAN ORDER YOUR CURTAINS TO BE

OPENED OR CLOSED DEPENDING UPON

WHEATHERYOU CAN ORDER YOUR AC

TO ON/OFF

AC

YOUR VIDEO CAMERA ON THE FRONT DOOR CAN

TRANSMIT TEH IMAGE OF PERSON STANDING ON YOUR DOOR WHEN YOU ARE AWAY ON

VACATION IN SOUTH AMERICA

CAMERA

HOME COMPUTER/COMM. SYSTEM

YOR FUTURISTIC HOME IN INDIAN VILLAGE

FROM CARPHONE YOUR WIFECAN ORDE R OVEN TO START

ISDN : CONCEPT OF FUTUREISTIC HOME& COMMUNICATION

Documents

GENERAL ARCHITECTURE OF OCB-283 SUBSYSTEMS & FUNCTIONS OF OCB-283