ND3321

ND3321

SYSTIMAX STRUCTURED CABLING SYSTEMS

(SCS)

DESIGN AND ENGINEERING

LESSON 4

HORIZONTAL SUBSYSTEM DESIGN

Developed by Lucent Technologies Network

Systems

Customer Training and Information Products

[page 3]

Horizontal Subsystem Design

The design of the horizontal segment involves the integration of transmission media and components from the Horizontal Subsystem which consists of 4-pair Unshielded Twisted Pair (UTP) and the Information Outlet. Transmision media from the Horizontal Subsystem includes plenum and non-plenum copper and fiber optic cable components. The Horizontal Subsystem includes the 8-bit modular jack and fiber optic outlets used for the termination of copper or fiber cables at the work area.

[page 4]

Components

Determining Cable Type

SYSTIMAX SCS offers several options for the horizontal subsystems. The type of cable provided depends on the customer’s present and future data requirements.

Both 24-gauge UTP abd Optical Fiber cables are available for user in the Horizontal Subsystem. The following table shows the various cable types available for use in a SYSTIMAX SCS.

Cable Type Descriptions1010/ 2010 Category 3, 4-pair UTP cable1041/ 2041 Category 4, 4-pair UTP cable1061/ 2061 Category 5, 4-pair and 25-pair UTP cable 1090/ 2090 Composite cable containing 1 Category 3

and 1 Category 5 4-pair UTP cable plus 2 Oprical Fibers

1290/ 2290 Composite cable containing 2 Category 3 UTPcables and 2 Optical Fibers

1861A/ 1862A Fiber Optic Jumper Cordage, Duplex/Quad (Non-plenum only)

LGBC-LRX/LPX ACCUMAX Fiber Optic Cable, 2 to 12 Fibers

The 4-pair UTP cable pair color combinations are as follows:

[page 5]

Information Outlets

Overview

SYSTIMAX SCS offers several diferent types of information outlets for use wit UTP or Optical Fiber cables. These outlets can be configured to terminate four -pair UTP cables, Optical Fiber cables or both.

The four-pair UTP cable is hard wired to an 8-pin modular jack on the closet side and a cord plugs into the jack on the work area side.

The optical fibers are connectorized and placed in a fiber coupling on the closet side of the outlet. A connectorized fiber cord is used on the work area side of the fiber coupling.

1010 Cable Pair Colors

(T)ip (R)ingW-BL BL-WW-O O-WW-G G-WW-BR BR-W

1061 & 2061 Cables Pair Colors

(T)ip (R)ingW BLW OW GW BR

2010 Cable Pair Colors

(T)ip (R)ingW-BL BLW-O OW-G GW-BR BR

Pair No.

1234

The IO is ordered by the system designer and installed at each work area as shown on the workprints or supplemental support documents. Depending on the need of the customer, more than one type of IO may be required for a given distribution system design. The use of different IO types complicates the installation process and requires much more care by the system designer in preparing system documentation.

When the IO Fits into SYSTIMAX SCS

The IO provides an administrable oundary interface, between the horizontal wiring and the nework area wiring. IOs serve as end-points in the building distribution system, i.e.,points where terminal devices are connected or disconnected.

[page 6]

The SYSTIMAX SCS Standard IO

The M-series 8-pin modular outlets are used for all SYSTIMAX SCS distribution systems:

Basic Enhanced Integrted

The 8-pin configuration provides the flexibility needed to support data, voice or a combination of bth for one IO arrangement.

Beyond the immediate or present service scenarios that can be supported, the standard IO meets the currently defined ISDN interface standards.

The IOs Pin-Pair Assignment

To permit circuit administration at the cross-connects , signals for different services appear on specified wire pairs. The 8-pin IO is wired internally to make this happen. The 8-pin jack connects particulr pins on the station (the work area wiring) to particular twisted –wire pairs of the building distribution cable (the horizontal wiring).

For analog voice terminals, it is standard practice throughout the industry to put the tip and ring signals on the two center conductors of the card station (pins 4 and 5 of a 4-pair cord). For SYSTIMAX SCS, it is standard practice to put analog voice band signals on pair 1 of the 4-pin distribution cable (pins 4 & 5 of a 4-pair cord).

The remaining pin assignment are for data signals and remote power for adjuncts. Pins 1,2,3 and 6 carry data signals and are wired to pairs 2 and 3 of the 4-pair cable. Pins 7 and 8 are wired straight throgh as pair 4 and are reserved for adjunct power.

A modular 6-position line cord is also compatible with the 8-position IO. The analog signal is connected to the center pins (3 & 4) of the plug. The size and shape of the plug mates with the 8-position jack with the exception of pins 1 & 8. Pair 1 of the IO mates with pair 1 of the plug and pair 3 of the IO mates with pair 2 of the 6-position plug. Pair 3 of the 6-position plug cannot be used since this would be splitting pairs 2 & 4 of the 8-position IO.

[page 7]

8-PIN INFORMATION OUTLET

[page 8]

TIA-568A Outlet Specifications

In the TIA-568A Standard, there are two configurations for termination of the 4-pair cable. They are designated T568A and T568B. The T568A wiring has pair 2 (orange) terminated on pins 3 & 6 and pair 3 (green) terminated on pins 1 & 2. The T568B wiring just reverses the termination of the orange and green pairs. Although T568A and T568B wiring is supported for system registration, SYSTIMAX SCS recommend use of the T568B wiring.

T-568A PIN/PAIR ASSIGNMENTS

T568B PIN/PAIR ASSIGNMENTS

[page 9]

SYSTIMAX SCS IO Recommendations

Where the customer’s needs are not defines and no commitment to a specific system has been made, the recommendation is to install two IOs per work area. This administration at the cross-connect fields in the equipment room or telecommuncation closets.

Adapters and other devices are available for use in a one IO environment that permit a common interface arrangement. The type f devices and transmission signals to be integrated must be considered carefully before a design commitment is made. This decision must take into account the economic tradeoffs of each design option as well as the more intangible factor of system administration. This also considers the impact of moves and rearrangements over the lifetime of the distribution system.

[page 10]

Design Steps – Home – Run Cabling Method

Horizontal Segment Design Steps

1. Determine number og Was and type of information outlets

2. Determine length of cables

3. Order cable

1. Determine the Number og Work Areas and Types of Information Outlets

The following stepss should be followed when the quantity of and locations for the voice and daata information outlets has not been specified on the architect drawings. If that information has been provided, eliminate steps B, C and D.

A. Determine the service area of each telecommunication clset and the media distribution system applicable, based on identified customer needs and architectural considerations.

B. Calcuate usable floor space for the floor plan. (Generally 80 to 85 percent of gross floor space.)

C. Estimate the total number of work areas and IOs. Plan on an IO for every 100 square feet (9m2) of space for Basic SYSTIMAX SCS and two or more IOs per 100 square feet (9m2) for Enhanced and Integrated Systems.

D. Determine the type of IOs. IOs come in different mounting styles to uit different needs. Flush-mounted IOs are usually installed in new construction, surface-mounted IOs in existing buildings.

E. Record the number of work areas served by each closet on the Backbone/Riser Subsystem Worksheet.

[page 12]

2. Determine Lengths of Cable

Determine media distribution methods and cabling routes

Establish areas to be served by each telecommunication closet

Identify the Shortest Cable Run (A) to the IO location closest to the serving closet

Identify the Longest Cable Run (B) to the IO location farthest from the serving closet

Measure each run following the probable cable routes

Calculate the Average Cable Length (AL) = A + B divided by 2

Calculate Slack (S) = AL times 10%

Determine Closet Termination Allowance (C)(Variable depending on closet distribution)

Determine work area Drop Length (D)

(Only required with overhead distribution)

Calculate Total Average Cable Length (TCL) = AL + S + C + D

[page 13]

HORIZONTAL SEGMENT EXAMPLE

Home-Run Cabling Method

Example:

(A)

Shortest Cable Run

(B)

Longest Cable Run

(AL)

Average Cable Length

(S)

10% Slack

(C)Closet

Termination Allowance

(D)Work Area

Drop & Termination

(E)

Total Average Cable Length

30 Ft. 90 Ft. 60 Ft. 6 Ft. 20Ft. * 15 Ft. ** 101 Ft.

(9m) (27m) (18.5m) (2m) (6m) (4.5m) (31m)

* Variable** Only required with overhead distribution

[page 14]3. Order Cable4-pair UTP is avilable in lengths from 1,000 feet (305m) to 16,800 feet (5km). UTP can be ordered package in 1,000 ft. lengths in boxes or on reels. For engths greater than 1,000 ft.,

only reels are provided.

Give careful consideration to the packaging before ordering. Pay particular attention to the average length of wire run and number of wire runs that can be taken from the spool or reel ordered.

Sample Calculation:

Maximum orderable length ÷ total average length of wire run= number of runs/ 1,000 ft. Box

1,000 ft. (303 m) ÷ 78 ft. (23.6) = 12.8 cable runs/ 1,000 ft. Box(rounded down to 12)

Since each IO represents a separate wire, the total number of wire runs is equal to the total number of IOs. Therefore,

Number of IOs ÷ Number of Runs/ 1,000 ft. Box = Number of boxes of cable

140 ÷ 12 = 11.6 rounded up = 12 boxes

[page 15]

Zone Cabling Method

Zone cabling is an approved alternative to home-run cabling for SYSTIMAX SCS. This method is called “Zone Wiring” in SYSTIMAX SCS documentation. However, the Standards community refers to it as “Open Office” cabling. While Open Office cabling is not covered by the existing TIA-568A Standard, a TIA working group is currently drafting a proposed standard. The information on the following pages provides definitions and design rules for zone cabling.

The zone cabling method divide the horizontal segment into 2 parts:1. A permanent section from the Telecommunication Closet (TC) to a Consolidation Point (CP), the

Zone Cables.2. An adjustable or flexible section from the CP to the IO, the Extension Cables

Zone CablesZone cables may be either 4-pair or 25-pair Category 5 cables.

Consolidation PointsConsolidation points must house and otherwise protect Consolidation Connections. The following types of hardware products may be used at consolidation points:

Product Descriptions

M106SMB 6 Position Modular Surface Mount Box

M112SMB 12 Position Modular Surface Mount Box

DW1-25 25-pair 110 Wiring Block

DW1-50 50-pair 110 Wiring Block

M16A1 Flush mount Modular Faceplate (6 position)

M100 Modular Information Outlet

362A Zone Wiring Label Kit

Note: When th CP is located in the plenum area, above the hardware must be enclosed in an approved enclosure.

[page 16]Extension Cables

Extension cables cover the distance between the CP and the work area IO. The 1061/ 2061 4-pair Category 5 cables, 1064 Category 5 cordage, or 1074 Category 5 cordage may be used for extension

cables. The type of hardware used for the CP determines which type of extension cable to provide. The 4-pair cables are only used when 110 Wiring locks are provided for the CP.

The following table shows the cable type used with each type of CP hardware:

CP Hardware Cable Type

110 Wiring Block 1061/ 2061 4-pair cable or non-connectorized 1064 or 1074 cordage

Moduar Surface Mount Box or Flush Mount Faceplate

Connectorized 1064 or 1074 cordage

The 117P8, D8P or D8N connectorized cabled may be ordered for use as extension cables. Single ended connectorized cables are used with the connectorized end being plugged into the CP and the non-connectorized end being hard wired to area M100 IO.

Note: Double ended connectorized cables may be ordered and cut into 2 single-ended caords.

The consolidation point design options are shown on the following page.

[page 17]

CONSOLIDATION POINT DESIGN OPTIONS

[page 19]

(1061 or 2061)

M112 SMB or M106 SMB

117P8E, D8P, or D8N Zone

M100 or MPS100

D8AU or D8SA

Multi-User IO Option

With an easily accessible transition point and a suitable work area, the work are IO can be eliminated and the extension cable combined with the work area cable. With this arrangement, the transition connections at the transition point become a multi-user IO.

[page 20]

Extension Cable Length Limitations

When zone cabling is used, the 100 meter maximum cable limit, which includes the WA connection and the horizontal cross-connect, must be maintained at all times. This includes initial design and all subsequent moves and changes. Consolidation points should be labeled to indicate the length of the zone cable to the TC.

Consolidation Point Design Options

The maximum length of the extension cable between the CP and the work area IO is restricted as described below:

Option A:

When using 1061/2061 4-pair or 25-pair cables, lengths of up to 70 meters are allowed for the extension cable between the CP and the work area IO. The CP cannot be positioned closer than 20 meters from the horizontal cross-connect.

Note: For total horizontal lengths under 20 meters, the position of the CP is not restricted.

The 70 meter maximum length can only be achieved with the CP within 20 meters of the horizontal cross-connect and a total of not more than 10 meters of 1064 cordage used for the horizontal cross-connect and the WA connection.

Option B:

The total length of 1064 cordage in the horizontal segment is limited to 30 meters. The maximum amount of 1064 cordage allowed for the horizontal cross-connect and the WA connection is 10 meters. Therefore, the amount of 1064 cordage used as an extension cable should be limited to 20 meters.

[page 21]

EXTENSION CABLE LENGTH LIMITATIONS

[page 22]

Multi-user Information Outler (MIO) Option

When this arrangement is specified, the extension cable and work area cables are combined into a single cable.

The total length of 1064 cordage in the horizontal segment is limited to 30 meters. The maximum amount of 1064 cordage allowed for the TC cross-connect and WA connection is 10 meters. This 10 meter length is generally split as follows:

TC cross-connect - 7 meters WA connection - 3 meters

Therefore, the amount of 1064 cordage used as an extension cable should be limited to 23 meters.

MULTI-USER INFORMATION OUTLET OPTION

(TOTAL 1064 30m MAX.)

[page 23]

Enhanced Power Sum Solution

The SYSTIMAX SCS Enhanced Power Sum Solution, introduced in 1996 includes the following components, which exhibit far better electrical and transmission performance than first-generation Category 5 products.

MPS100 Information Outlet PATCHMAX Distribution Hardware 1061+ AND 2061+ cables Cords constructed using 1074 cordage

Since the performance of 1074 cordage is nearly identical to the performance of 1061+/2061+ cables, there are no length restrictions on cordage when cords made from 1074 cordage are used. In other words, if the horizontal doesn't include 1064 cordage, the length is limited to a maximum 100 meters total for 1061+/2061+ cable combined with 1074 cordage.

[page 24]

Horizontal Segment Design Steps - Zone Cabling

1. Determine number and type of information outlets2. Determine number and type of consolidation points3. Determine the lengths of zone cables4. Determine the lengths of extension cables5. Order cable

1. Determine the Number and Type of Information Outlets

The following steps should be followed when the quantity of and locations for the voice and data information outlets has not been specified on the architect drawings. If that information has been provided, eliminate steps B, C, and D.

A. Determine the service area of each telecommunication closet and the media distribution systems applicable, based on identified customer needs and architectural considerations.

B. Calculate usable floor space from the floor plan. (Generally 80 to 85 percent of gross floor space)

C. Estimate total number of work areas and IOs. Plan on an IO for every 100 square feet (9m2) of space for Basic SYSTIMAX SCS and two or more IOs per 100 square feet (9m2) for Enhanced and Integrated Systems.

D. Determine the type of IOs. IOs come in different mounting styles to suit different needs. Flush-mounted IOs are usually installed in new construction, surface-mounted IOs in existing buildings.

E. Record the number of work areas served by each closet on the Backbone/Riser Subsystem Worksheet.

[page 25]

BACKBONE/RISER SUBSYSTEM WORKSHEET

*insert pic

[page 27]

2. Determine the Number and Type of Consolidation Points

In step 1, the number of work areas was determined either using the 100 square foot rule or from the information contained on the architect drawings.

The following are the SYSTIMAX SCS recommendations for determining the number of transition points on a floor. They are based upon the enhanced design and TIA-568A requirement to place two IOs at each work area.

CP Hardware Zone Cable Number of Work Areas Served

25-pair 110 Wiring Block or M106SMB

One 25-pair 1061/2061 cable or Six 4-pair 1061/2061 cables

3

50-pair 110 Wiring Block or M112SMB

Two 25-pair 1061/2061 cables or Twelve 4-pair 1061/2061

cables

6

[page 28]

Determine Lenghts of Zone Cable

Determine media distribution methods and cabling routes Establish areas to be served by each telecommunication closet Identify the Shortest Cable Run (A) to the CP location closest to the serving closet Identify the Longest Cable Run (B) to the CP location farthest from the serving closet Measure each run following the probable cable routes Calculate the Average Cable Length (AL) = A+B divided by 2 Calculate Slack (S) = AL times 10% Determine Closet Termination Allowance (C)

(Variable depending on closet configuration) Calculate Total Average Cable Length (TCL) = AL + S + C

[page 29]

Example:

(A)

Shortest Cable Run

(B)

Longest Cable Run

(AL)


(S)

10% Slack

(C)

Closet Termination

Allowance

(TCL)


40 Ft 100 Ft 70 Ft 7 Ft 15 Ft* 92 Ft

(12 m) (30.5 m) (21.5 m ) (2m) (4.5m) (28m)

*variable

[page 30]

Determine Lengths of Extension Cable

Determine media distribuiton methods and cabling routes from CP to work area IO Establish areas to be served by each CP Identify the Shortest Cable Run (A) to the IO location closest to the CP Identify the Longest Cable Run (B) to the IO location farthest from the CP Measure each run following the probable cause routes Calculate the Average Cable Length (AL) = A+B divided by 2 Calculate Slack (S) = AL times 10% Determine Work Area Drop Length (D)

(Variable depending on closet configuration) Calculate Total Average Cable Length (TCL) = AL + S + D

[page 31]

Example:

(A)

Shortest Cable Run

(B)

Longest Cable Run

(AL)


(S)

10% Slack

(D)

Work Area Drop &

Termination

(TCL)


15 Ft 45 Ft 30 Ft 3 Ft 15 Ft* 48 Ft

(4.5 m) (13.5 m) (9 m ) (1m) (4.5m) (14.5m)

*Only required with overhead distribution

[page 32]

Summary

In this lesson the students learned to:

Determine the number and types of IOS for an office building Identify the types and lengths of cable for each distribution zone using the Home-

Run and Zone cabling methods Calculate the total cable, IOs and M14C Modular Furniture Faceplates for an existing

building.

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