AT&T System 25 - Manual (Page 172)

SYSTEM TESTS
TEST EXTERNAL ALERT (NIGHT SERVICE)
Place a
sounds
alerting
alerting
1.
2.
3.
4.
5.
6.
7.
8.
test call to the attendant console to verify that the alerting device
when
device
device
At the
the attendant console is in the Night Service mode. If an
has not yet been installed, connect a spare voice terminal or
to the modular jack reserved for the alerting device.
attendant console, press the Night Service button.
The Night Service LED lights steadily.
At any voice terminal, go off-hook. Dial the CO trunk access code,
and dial the number of a CO trunk that receives night service
coverage.
Verify that the alerting device sounds.
At another voice terminal, go off-hook
access code. and dial the night service
The alerting device ringing should stop.
The call should be picked up.
Verify transmission.
At both voice terminals, go on-hook.
Repeat Steps 2 through 6 for each night service trunk.
At the attendant console, press the Night Service button again and
verify that the Night Service LED goes dark.
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