AT&T System 75, Wiring Diagram

Page: 299 / 345

CHAPTER 5. AUXILIARY EQUIPMENT INSTALLATION
5 .
6 .
7 .
8 .
9 .
For 110-type hardware, install a yellow (auxiliary) label on the
110-type terminal block. For 66-type hardware, write the lead
designations on the 66-type connecting block with a felt-tipped pen.
Remove the cover from the 36A voice coupler, and install the voice
coupler.
At the 36A voice coupler:
Make connections to the 110-type wiring block on the
ED-1E443-10 intra-connection panel (Figure 5-14).
Connect a 2012D transformer to terminals AC and ACG.
Install the cover.
Install recorded announcement equipment per manufacturer’s
instructions.
Plug the 2012D transformer into a 117-volt ac receptacle not under
control of a wall switch.
Install patch cord/jumper wires at the cross-connect field.
Administer per AT&T System 75 and System 75 XE—Implementation
( 5 5 5 - 2 0 0 - 6 5 1 ) a n d AT&T System 75 and System 75
XE—Administration (555-200-500).
Digital Announcer
Requirements
The Cook Electric digital announcer can be mounted in the auxiliary
cabinet on a 23-inch relay rack. The relay rack includes the side bracket
kit that consists of two side brackets and four mounting screws. The
vertical height is 1.75 inches. If the digital announcer is located outside
the auxiliary cabinet, it is powered by a 117-volt ac adapter furnished by
Cook Electric. If the digital announcer is mounted inside the auxiliary
cabinet, -48V dc power is provided by a rectifier mounted at the base of
the cabinet. The alarm panel is mounted at the top of the cabinet.
5-26
●
●
●
10.
11.