AT&T 75 - Installing External Ringing

66-TYPE HARDWARE
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.
2.
3.
4.
5.
6.
Determine port assignment of Trunk Answer From Any Station (Call Answer
From Any Voice Terminal) feature from Console Parameters Form:
EXAMPLE: Port Number B
02 01
Carrier
Slot Circuit
Install jumper wires at cross-connect field.
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
device (see Figure 4-75).
Connect red (R) and green (T) leads to ringing device.
Administer per AT&T System 75 and System 75 XE Implementation and AT&T
System 75 and System 75 XE Administration.
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