AT&T System 75, Wiring Diagram

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CHAPTER 1. INTRODUCTION
CHAPTER 1. INTRODUCTION
General
This guide is one of the three documents (Figure 1-1) required to install
a System 75 or 75 XE switch. This guide describes 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
The main equipment room cross-connect field and the associated
cabling from this cross-connect field to the switch cabinet and/or
8-pin modular wall jacks (information outlets).
All information in this guide is compatible with both System 75 or 75 XE,
except when a statement is made that a topic is strictly for a specific
switch.
The other documents required for the installation of the System 75 or 75
XE are as follows:
AT&T System 75—Installation and Test (555-200-104):
Contains the information required to install and test a System 75
switch and attendant console. For continuity purposes, the
attendant console wiring is covered in this guide.
AT&T System 75— XE Installation and Test (555-201-104):
Contains the information required to install and test a System 75
XE switch and attendant console. For continuity purposes, the
attendant console wiring is covered in this guide.
DEFINITY™ Communications System and System 75, and
System 85—Terminals and Adjuncts, Installation and Tests
(555-015-104)
Contains the information required to install and test
telephones/voice terminals and their associated adjuncts.
1-1