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Maintenance Object Repair Procedures
555-233-123 10-1720 Issue 4 May 2002
Standby Reference Health Check Test (#651)
This test evaluates the quality of the external synchronization timing source for the
Standby Tone-Clock circuit pack.
Table 10-634. TEST #651 Standby Reference Health Check Test
Error
Code Test
Result Description/Recommendation
ABORT This test may already be running due to a tone-clock
installation, scheduled maintenance, alarm activity, or a
technician-demand test from another terminal. This abort can
also occur due to an internal system error.
1. Try the command again at 1-minute intervals up to 5
times.
1184 ABORT This test requires an external synchronization source to be
administered (DS1 primary, DS1 primary and secondary, or
Stratum 3 Clock).
1. Administer the external synchronization source and retry
the test.
2500 ABORT Internal system error
1. Try the command again at 1-minute intervals up to 5
times.
0 FAIL If the Tone-Clock circuit pack is in the PPN, the external
synchronization timing source for side A of the Stratum 3
clock, or for the Primary DS1 reference is either absent or
invalid. If the Tone-Clock circuit pack is in an EPN, the
synchronization reference from the active EI circuit pack is
either absent or invalid.
1 FAIL If the Tone-Clock circuit pack is in the PPN, both external
synchronization timing sources are either absent or invalid. If
the Tone-Clock circuit pack is in an EPN, the
synchronization references from both EI circuit packs are
either absent or invalid.
1. Correct the synchronization source problem. Refer to the
Synchronization (SYNC) maintenance section of this
manual.
2. If the error still exists, replace the Tone-Clock circuit pack
reported in the error log.
PASS The external synchronization timing source is valid.
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