Maintenance Object Repair Procedure
555-233-142
8-1050 Issue 1 May 2002
3. For duplicated Tone-Clock circuit packs in the master port network,
enter set tone-clock UUC command to switch the Tone-Clocks.
For unduplicated Tone-Clock circuit packs in the master port
network of a system, replace the primary and secondary (if
assigned) DS1 Interface circuit packs.
4. Investigate any other SYNC errors.
f. Noise on the DS1 line can cause transient alarms on synchronization.
Therefore, when a sync problem occurs on error types 1, 257, or 513, a
WARNING alarm is first raised for 15 to 20 minutes before the alarm is
upgraded to a MINOR or MAJOR alarm.
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the table below when inspecting
errors in the system.
Test Synchronization Test (#417)
This test updates every Synchronization Maintenance component with the correct
information about its role in providing a system’s synchronization. Specifically,
this test updates every:
■ IPSI circuit pack’s Tone-Clock circuit
■ DS1 Interface and UDS1 Interface circuit pack
in the system. The test either passes or aborts.
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1. D = Destructive, ND = Non-destructive
Test Synchronization test (#417) X X ND
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