Installing External Ringing - AT&T 75 Wiring Manual

Figure 4-74. Ground Start Key Installation

Installing External Ringing

Requirements
Figure 4-75 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 cannot exceed three ringer equivalences.
Installation
1 . Determine port assignment of Trunk Answer From Any Station (Call Answer
From Any Voice Terminal) feature from Console Parameters Form:
Install jumper wires at cross-connect field.
2 .
3 . Mount ringing device at location specified on External Ringing Device Worksheet.
4 .
Run 2-pair line cord (modular plug at one end) from information outlet to ringing
device (see Figure 4-75).
5 .
Connect red (R) and green (T) leads to ringing device.
Administer per AT&T System 75 and System 75 XE Implementation and A T & T
6 .
System 75 and System 75 XE Administration.
EXAMPLE: Port Number
66-TYPE HARDWARE
B 0 2 0 1
Carrier Slot Circuit
4-113