AT&T System 25 - Manual (Page 259)

MAINTENANCE
N o t e : For problems with administration equipment that is not
connected on a dedicated basis, refer to the Terminal
Operations Manual, 555-540-710.
Time-Keeping Troubles
Symptoms:
Clock
Procedures:
1. Reset
doesn’t reflect current time or date.
clock from SAT (see the Administration Manual). Clock has
tolerance of plus or minus 3 minutes per month. Variances outside
this range indicate a faulty clock and require replacement of the
CPU/Memory CP. Time must be reset
Voice Terminal and Wiring Troubles
Symptoms:
Intermittent voice terminal troubles.
Procedures:
1.
2.
3.
4.
5.
Swap a known good terminal with
for Daylight Savings Time.
the questionable terminal to
determine if problem is localized to a single terminal. If local power
is provided, check power supply.
if troubles do not persist, problem is localized to single terminal.
Replace faulty terminal.
If good terminal does not work properly, fault is in wiring or circuit
pack (CP).
Check other terminals connected to same CP. If other terminals are
working properly, fault is probably in wiring. Swap wiring between
Station Interconnect Panel and terminal to verify wiring problem.
Check and clear any wiring problems.
If other terminals connected to same CP are not working properly,
fault is probably in CP.
4-82