Installing External Ringing - AT&T 75 Wiring Manual

Figure 2-96. Ground Start Key Installation

Installing External Ringing

Requirements
Figure 2-97 shows the connections for external ringing. External ringing is provided by a
device, such as a gong, chime, or bell, connected to an information outlet. The switch side of
the cross-connect field is connected to a TN742 or TN769 Analog Line circuit pack located in
a port carrier. The TN742 or TN769 circuit pack contains a maximum of eight ports.
The maximum number of devices that can be connected to one TN742 or TN769 circuit pack
port can not exceed 3 ringer equivalences.
Installation
Determine port assignment of Trunk Answer From Any Station (Call Answer
1 .
From Any Voice Terminal) feature from Console Parameters Form:
Install patch cord at cross-connect field.
2 .
3 Mount ringing device at location specified on External Ringing Device Worksheet.
Run 2-pair line cord (modular plug at one end) from information outlet to ringing
4 .
device (see Figure 2-97).
5 . Connect red (R) and green (T) leads to ringing device.
6 . Administer per AT&T System 75 and System 75 XE Implementation and A T & T
System 75 and System 75 XE Administration.
EXAMPLE: Port Number
Z100-TYPE HARDWARE
0 2 01
B
Carrier Slot Circuit
2-137