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MERLIN LEGEND Communications System Release 5.0
System Manager’s Guide
555-650-118
Issue 1
June 1997
System Components
Page 3-48Power-Related Hardware
3
Trouble Alarm 3
System operator consoles have programmed Alarm buttons to let you know if
there is a problem with the system. An external bell or light can be attached to a
console to supplement the button. If this is not enough notice of a system
problem, a Lucent Technologies technician can use a loop-start line jack and a
UPAM to attach a bell or strobe light to the system.
Power-Failure Alarm 3
A Lucent Technologies technician can use a ground-start or loop-start
power-failure transfer (PFT) telephone jack to attach an alerting device that goes
off during a power failure. You can connect a PFT telephone to this jack when the
jack is connected for a power-failure alarm.
Power-Failure DID Busy-Out 3
A Lucent Technologies technician may program the PFT jack on a ground-start or
module to automatically short the
busy-out
wire pair for a group of DID trunks
when a power failure occurs. This signals the CO that the DID trunks are out of
service.
Power-Failure Transfer Telephone 3
A power-failure transfer (PFT) telephone is a single-line telephone connected to a
PFT jack on a 400, 400/GS/LS, 408, 408 GS/LS, 408 GS/LS-MLX, 800, 800
GS/LS, or 800 GS/LS-ID module. If there is a power failure, the system shuts off
and the PFT telephone automatically connects to an assigned outside line for
making and receiving calls.