Auxiliary Equipment Installation; Auxiliary Equipment Description - AT&T 75 Wiring Manual

Figure 3-113. Connections for External Ringing or Queue Warning Indicator

AUXILIARY EQUIPMENT INSTALLATION

Auxiliary Equipment Description

The following equipment can be optionally provided with the system.
278A Adapters—Provides an interface, when required, to customer-provided
equipment for Loudspeaker Paging feature. The 278A adapter requires -24 volt dc
power. It can be modified for -48 volt dc power with a D-181321 kit of parts
(Comcode 103 031 181).
89A Control Unit—Can also be used to provides an interface, when required, to
customer-provided equipment for Loudspeaker Paging feature. A 2012D transformer
provides -48 volt dc power to the 89A.
PagePac Paging System—Provides an amplifier system for Loudspeaker Paging
feature. Three models are available:
— PagePac 20—Provides a single zone of paging with an input source for music.
The unit can also be modified to provide 9 or 39 paging zones.
— PagePac VS—Provides one to three paging zones. It also permits all zone
paging. Two optional feature cards are available to provide music or talk-
back over paging.
— PagePac 50/100/200—Provides 1 to 24 paging zones. Optional add-ons are
available to provide music or talk-back over paging. It is also possible to use
a customer-supplied music source.
All PagePac models require 115-volt ac power.
110-TYPE HARDWARE
3-153