AT&T System 75 User manual

AT&T System 75
and System 75 XE
Wiring
555-200-111
Issue 1, April 1987
Copyright © 1987 AT&T — All Rights Reserved
Printed in U.S.A.

Call:
Write:
Call:
TO ORDER COPIES OF THIS MANUAL
AT&T Customer Information Center on 800-432-6600
In Canada Call 800-255-1242
AT&T Customer Information Center
2855 North Franklin Road
P. O. BOX 19901
Indianapolis, Indiana 46219
TO COMMENT ON THIS MANUAL
The AT&T Document Development Organization
Hot Line:
800-334-0404
In North Carolina Call 919-727-3167
Every effort was made to ensure that the information in
this document was complete and accurate at the time of
printing. However, information is subject to change. This
document will be reissued periodically to incorporate
changes.
Published by
The AT&T Documentation Management Organization

INTRODUCTION
CONTENTS
Page
ORGANIZATION
Use of Guide
Equipment
GENERAL
CROSS-CONNECT HARDWARE SELECTION
WIRING HARDWARE CHANGES
PLANNING
Job Aids
Terminals
Site or Satellite Closets
Cabling Facilities
1-3
1-3
1-4
1-4
1-7
1-7
1-7
1-8
1-8
1-10
1-10
-i-

LIST OF FIGURES
Figure 1-1. Documentation Block Diagram
Figure 1-2. System Uniform Wiring Plan
Figure 1-3. Sample Uniform Wiring Installation
Figure 1-4. Sample Floor Plan With Terminal Locations Marked
Figure 1-5. Riser Cable Placement
1-2
1-5
1-6
1-9
1-11
-ii-

1. INTRODUCTION
This is one of three documents (Figure 1-1) required for the installation of the System 75 or
the System 75 XE. This guide explains the hardware, job planning, equipment ordering, and
installation information from:
●
●
The telephone company network interface up to and including the 25-pair cables that
connect directly to the switch and
The main equipment room cross-connect field and cabling from this field to the
switch cabinet and to the 8-pin modular wall jacks (information outlets).
Unless a statement is made that a topic is strictly for the System 75 or the System 75 XE,
all information in this document refers to both systems.
The other two documents required for the installation of the System 75 or System 75 XE are
as follows:
AT&T System 75—Installation and Test (555-200-104):
Contains information for installing and testing the System 75 switch and the
attendant console. (For continuity purposes, wiring of the attendant console is
also covered in this guide.)
AT&T System 75 XE—Installation and Test (555-201-104):
Contains information for installing and testing the System 75 XE switch and the
attendant console. (For continuity purposes, wiring of the attendant console is
also covered in this guide.)
AT&T System 75 and System 85—Terminal Installation and Test (999-700-
214IS):
Contains information for the installing and testing of the voice terminals and
their associated adjuncts.
1-1

Figure 1-1. Documentation Block Diagram
1-2

ORGANIZATION
This guide is organized into five sections:
●
●
●
●
●
●
SECTION 1—INTRODUCTION
Contains an overview of the system Uniform Wiring Plan and presents
general guidelines on hardware selection and manual organization.
SECTION 2—Z100-TYPE MODULAR HARDWARE
Contains an explanation of Z100-type and associated hardware, job planning,
equipment ordering codes, and how to install the hardware.
SECTION 3—110-TYPE HARDWARE
Contains an explanation of 110-type and associated hardware, job planning,
equipment ordering codes, and how to install the hardware.
SECTION 4—66-TYPE HARDWARE
Contains an explanation of 66-type and associated hardware, job planning,
equipment ordering codes, and how to install the hardware.
SECTION 5—GLOSSARY
Contains a brief description of some of the terms used in this guide.
SECTION 6—INDEX
Contains a permuted index.
Use of Guide
This guide will be helpful in planning, designing, and installing a cost-effective wiring
installation that allows moves, changes, and additions to be made quickly and easily. To
make the best use of this guide, take the time to read it thoroughly and become familiar
with its contents and organization. For quick access to information needed to answer most
questions, simply refer to the table of contents and locate the specific item in question.
To answer questions requiring more information than this guide contains, consult the
documents listed previously in this introduction section. If you need additional help, contact
the Premises Services Consultant (PSC).
For further technical assistance, the recommended channel for AT&T System Technicians is
as follows:
1. Contact your Field Assistance and Support Team (FAST).
2. If a satisfactory answer is not obtained from the FAST center, contact your
supervisor.
3. Your supervisor should contact the regional staff, if necessary.
1-3

Equipment
Most of the items specified in this guide are available through your local AT&T Information
Systems Marketing Branch Office (MBO). However, some common use hardware items may
have to be obtained from other sources.
GENERAL
Station wiring has a significant role in today’s customers’ information systems.
Technological innovations have enabled both voice and data transmission to be provided
through communications system wiring and have simplified wiring by significantly reducing
the number of cable pairs required by terminals with enhanced feature options.
This guide provides planning, ordering, and installation guidelines for a system Uniform
Wiring Plan (Figures 1-2 and 1-3) using Z100-, 110-type, or 66-type hardware.
The system switch ports for data and voice terminals require three pairs of wire per circuit.
Voice terminal adjuncts require an additional pair for remote powering. To provide
maximum flexibility for voice terminal changes, rearrangements, and powering, all data and
voice terminal information outlets are wired with 4-pair cable. With proper administration,
this will allow any terminal to be located at any information outlet.
1-4

Figure 1-2. System Uniform Wiring Plan
1-5

Figure 1-3. Sample Uniform Wiring Installation
1-6

CROSS-CONNECT HARDWARE SELECTION
The following cross-connect hardware for new wiring installations is listed for the system.
Following each list item are considerations that should help to determine the appropriate
selection.
1. Z100-Type Hardware
●
●
●
Designed particularly for customer participation in cross-connect
administration due to patch cord design
Does not require technical skills for cross-connect administration
Firm quote price list for all installations up to 150 stations
2. 110P Hardware
●Customer participation in cross-connect administration due to patch cord
design
●Requires some amount of technical skill for cross-connect administration
3. 110A Hardware
●Not designed for customer participation in cross-connect administration—
requires technically skilled personnel due to use of jumper wires
●Less expensive material cost than the patch cord systems, but more
expensive installation and administrative labor cost
4. 66-Type Hardware
●Not designed for customer participation in cross-connect administration—
requires technically skilled personnel due to use of jumper wires
●Less expensive material cost than the patch cord systems, but more
expensive installation and administrative labor cost
Obviously, the customer’s degree of interest and preference for administering his or her own
cross-connections (because of likely lower total annual costs, as well as preference for
administering his or her cross-connect field at his or her convenience) should be given
primary consideration in recommending cross-connect hardware.
WIRING HARDWARE CHANGES
All jobs engineered by Premises Services Consultants (PSCs) based on customer
requirements and preferences should not be redesigned by the Field Services Organization
(FSO) without approval by the PSC/Marketing Branch Office (MBO). A change order must
be issued to affect billing.
PLANNING
The following brief introductory information will help you design a uniform wiring plan with
sufficient growth potential. The plan is flexible, simple, easy to administer, and reasonable
in cost.
1-7

Job Aids
Blueprints (floor plans) are an important tool when planning, designing, and installing
station wiring. The floor plans (Figure 1-4) provide a complete view of all conduit and other
cabling facilities placed during construction of the building. These facilities should be
considered when planning site or satellite locations and cabling.
Terminals
The number of information outlets to be installed per terminal location should be
determined by your requirements. It may also be advantageous to initially install any
additional information outlets that may be required for future growth or terminal
rearrangements.
To begin designing the station wiring, indicate the following information on the floor
plan(s):
●Location of each information outlet and associated terminal type if known (analog,
hybrid, or digital)
●Any associated terminal adjuncts or modules and the required powering
arrangements.
1-8

* AN OPTION TO THE CABLE DUCT SHOWN IS TO RUN CABLES (PLENUM-APPROVED, IF
APPROPRIATE OR REQUIRED) ABOVE A DROP/FALSE CEILING.
- INFORMATION OUTLET LOCATION
A- ANALOG TERMINAL DEVICE
1 -
SPEAKERPHONE
H - HYBRID TERMINAL DEVICE
2 - AMPLIFIED HEADSET
D - DIGITAL TERMINAL DEVICE
3 - CALL COVERAGE MODULE
S-
SURFACE MOUNTED INFORMATION OUTLET
4 -
FUNCTION KEY MODULE
F- FLUSH MOUNTED INFORMATION OUTLET
5 - DISPLAY MODULE
Figure 1-4. Sample Floor Plan With Terminal Locations Marked
1-9

Site or Satellite Closets
When determining the site or satellite closets, use the following information as a guide.
Indicate the locations on the floor plan.
a.
b.
c.
d.
Keep the number of locations to a minimum.
To minimize the station wiring distances, centrally locate the site or satellite
closets among the information outlets.
Site or satellite closets should be easily accessible and contain sufficient ac power
outlets. Terminals equipped with adjuncts that require power can be remotely
powered from a site or satellite location as well as from the main equipment room
or at information outlets. The distance between the power supply and the terminal
cannot exceed 250 feet (76.2 m) using 24-gauge wire.
Locks should be provided for the site or satellite closet to prevent tampering.
Cabling Facilities
The method of riser cable distribution between the main equipment room and the site or
satellite closets is usually determined by the type of cabling facilities (riser closets, conduit
size, cabling shafts, etc.) placed during construction of the building (Figure 1-5).
a.
The preferred arrangement is to have individual cables supply each site or satellite
closet.
b.
A second method is to have one or two large cables supply all the site or satellite
closets. This method requires smaller cables to be installed between the main riser
cable and the site or satellite closet. These smaller cables are spliced into the main
cable.
Determine the type of cabling required and mark the type and routing on the blueprint or
floor plan. Also indicate any additional cabling facilities required for riser and terminal
cabling.
1-10

CAUTION:
THE UNIFORM WIRING PLAN SHOULD NOT CONTAIN ANY BRIDGE
TAPS (AN UNUSED CABLE PAIR CONNECTED TO AWORKING CABLE
OR THE CONTINUATION OF AWORKING PAIR PAST THE POINT
AT WHICH ATERMINAL HAS BEEN CONNECTED).
Figure 1-5. Riser Cable Placement
1-11

2. Z100-TYPE HARDWARE—SYSTEM 75 AND SYSTEM 75 XE INSTALLATIONS
CONTENTS
GENERAL
Z100-TYPE HARDWARE
Connector Modules
Z100A1 Connector Module
Z100B1 Connector Module
Connecting Units
Cords
ZD6A-87 Patch Cords
ZD2A-87-10 Power Adapter Cords
Associated Hardware
Cable Slack Managers
General
Z113A Housing
Z114A Housing
NETWORK INTERFACES
RJ21X Network Interfaces
RJ2GX Network Interfaces
1.544 Mbps Digital Service Interfaces
SNEAK FUSE PANELS
575-4 Sneak Current Fuse Assembly
TRUNK/AUXILIARY FIELD
Cable Access Panels and Emergency Transfer Units
400A Apparatus Mounting
400B Apparatus Mounting
400C Apparatus Mounting
TRUNK CONCENTRATOR CABLES
WP-90929, List 2, Cable Assembly
WP-90929, List 4, Cable Assembly
16-PORT ANALOG LINE BOARD ADAPTER CABLE
4-PORT MET LINE BOARD CONCENTRATOR CABLE
ADJUNCT POWER UNITS
Individual Power Supplies
Page
2-1
2-2
2-2
2-4
2-4
2-7
2-10
2-10
2-11
2-12
2-12
2-12
2-13
2-13
2-15
2-15
2-15
2-15
2-15
2-15
2-16
2-17
2-17
2-17
2-17
2-20
2-20
2-20
2-23
2-24
2-24
2-24
-i-

Bulk Power Supply
346 Modular Bulk Power Supply
EQUIPMENT ROOM DESIGN
Typical System Equipment Room Floor Plans
General
Typical Floor Plans
Single-Section Cross-Connect Field
Mult-Section Cross-Connect Field
Wall Space Requirements
Single-Section Cross-Connect Field
Multi-Section Cross-Connect Field
Equipment Requirements
Connector Module, Patch Cord, and Cable Slack Manager
Requirements
Cable Access Panel Requirements
Trunk Circuit Capacities
Selecting the Cable Access Panel
EQUIPMENT ROOM HARDWARE AND CABLING INSTALLATION
Hardware Installation
Installing the Cross-Connect Field
Installing Cable Slack Managers
Labeling the Cross-Connect Field
Main Cross-Connect Field
Multi-Section Cross-Connect Field
Installing the Cable Access Panels (CAPs)
Labeling the Cable Access Panel
Installing the Sneak Fuse Panels
Cable Installation
Labels
Routing Cable Guidelines
General
Routing Cables From Switch Cabinet to Cross-Connect Field
Routing Cables From Cable Access Panel to Switch Cabinet
Installing Control Carrier Outputs Cable
Installing Trunk Cables Between Network Interface and System
Cabinet
Installing Coupled Bonded Conductor Grounding
2-26
2-26
2-29
2-29
2-29
2-29
2-29
2-33
2-34
2-34
2-34
2-35
2-35
2-36
2-36
2-36
2-38
2-38
2-38
2-40
2-41
2-42
2-47
2-50
2-51
2-60
2-60
2-60
2-61
2-62
2-63
2-64
2-65
2-66
2-73
-ii-

Installing Cables Between Switch Cabinet and the Cross-Connect
Field
Installing Cables Between Cross-Connect Field and Auxiliary
Cabinet
STATION WIRING DESIGN
Description
Information Outlets
Station Cables
Closets
Site Locations
Satellite Locations
Station Circuit Distribution From Equipment Room
4-Pair Station Circuits
3-Pair to 4-Pair Station Circuits
Layout
Locating Information Outlets
Locating Satellites and Sites
Adapter Requirements
Z100A1 Connector Module Requirements
Sizing 4-Pair Station Cables (DIW)
Sizing 25-Pair and Multiple 25-Pair Station Cables
3-Pair Station Cable Circuits
4-Pair Station Cable Circuits
STATION WIRING AND ASSOCIATED HARDWARE INSTALLATION
Installing the Station Cables
Installing Z100-Type Hardware at Satellite Locations
Labeling
Installing the Information Outlets
ADJUNCT POWERING
Adjunct Powering From the Equipment Room
Adjunct Powering From Satellite Locations
Adjunct Powering From Site Locations
Adjunct Powering From Information Outlets
PATCH CORD INSTALLATION AND ADMINISTRATION
Equipment Room Cross-Connect Field
Installing Patch Cords
Removing Patch Cords
2-74
2-78
2-78
2-78
2-78
2-78
2-80
2-80
2-82
2-83
2-83
2-83
2-88
2-88
2-88
2-88
2-88
2-88
2-88
2-88
2-89
2-89
2-89
2-92
2-93
2-95
2-96
2-96
2-96
2-96
2-100
2-102
2-105
2-105
2-105
-iii-

Installing and Removing Power Adapter Cords
Satellite Locations
1-Point Administration
2-Point Administration
MISCELLANEOUS WIRING INSTALLATION
Installing Attendant Console
Installing Selector Console
Installing INADS (Initialization and Administration System) Interface
Installing DS1 Tie Trunks
Collocated DS1 Tie Trunks
DS1 Tie Trunks Using 551-Type CSU
Installing Customer-Provided Alarm—System 75 XE Only
Installing Off-Premises Terminal Wiring
Installing Out-of-Building Terminal Wiring
Analog Out-of-Building Terminals
Digital Out-of-Building Terminals
Installing Emergency Transfer Units and Terminals
574-5 Power Transfer Unit
Z1A Emergency Transfer Unit
Installing External Ringing
Installing Queue Warning Indicator
AUXILIARY EQUIPMENT INSTALLATION
Auxiliary Equipment Description
Installing Loudspeaker Paging and Music-on-Hold
Installing Loudspeaker Paging Access—278A Paging Adapter
Installing Loudspeaker Paging Access—89A Control Unit
PagePac PAGING SYSTEM
PagePac 20
PagePac VS
PagePac 50/100/200
Installing Music-on-Hold Access
Installing Loudspeaker Paging With Background Music
Installing Recorded Announcement Equipment
Digital Announcer
Installing Audichron Wake-Up Announcement System—R1V3 Only
Installing Dial Dictation Equipment
2-106
2-106
2-107
2-107
2-107
2-107
2-111
2-112
2-114
2-114
2-114
2-116
2-116
2-118
2-118
2-119
2-122
2-122
2-130
2-137
2-138
2-139
2-139
2-140
2-142
2-144
2-146
2-146
2-146
2-146
2-152
2-156
2-157
2-161
2-162
2-165
-iv-

Installing 3270 Data Modules
Installing Processor Data Modules (PDMs)
Installing Applications Processor Interface—System 75 Only
Installing Audio Information Exchange (AUDIX) Interface—V3
Only
Installing Call Management System (CMS) Interface—V3 Only
Installing Distributed Communications System (DCS)—V2 and V3
Property Management System Interface—V3 Only
Installing Customer-Provided Terminal Using Asynchronous Data Units
(ADUs)
Installing Station Message Detail Recording Interface
2-166
2-168
2-171
2-173
2-173
2-173
2-174
2-174
2-176
-v-