Telephone Problems - Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual

MERLIN LEGEND Communications System Release 5.0 MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140 Maintenance and Troubleshooting

Telephone Problems

Telephone Problems
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Once you isolate a problem to the telephone (or a group of telephones), you can
run various tests to check a telephone's operation.
Use the procedure below as a general guideline for troubleshooting telephones.
Replace the telephone (or adjunct) with one that works properly.

If the problem persists, connect the telephone directly to the

control unit, using a cord that works properly.
If this solves the problem, replace the original cord.
The power supply may be shorted or open. If the wiring has been
crushed or severed, replace it.
a. Test the power supply for 48 VDC with a voltmeter or by
reconnecting the telephone or adjunct.
b. If the test for 48 VDC fails, replace the circuit pack in the
telephone or adjunct.
!
CAUTION:
A faulty circuit pack has the potential to damage the power supply, which
can cause widespread damage throughout the system.
If the problem persists, replace the mounting cord.

If the problem persists, continue as described below.

Issue 1 Issue 1
June 1997 June 1997
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