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.
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General