TDM-CLK (TDM Bus Clock)
Issue 4 May 2002
10-1735 555-233-123
Standby Reference Health Check Test (#651)
This test evaluates the quality of the external synchronization timing source for a
standby Tone-Clock circuit pack. All administered synchronization timing sources
must be valid for this test to pass. If the tone-clock circuit pack and the
synchronization timing sources are in different port networks, the EI circuit packs
transport the timing sources to the tone-clock.
Table 10-641. TEST #651 Standby Reference Health Check Test
Error
Code
Te s t
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 The external synchronization timing source for side A of the
Stratum 3 clock, or for the primary DS1 reference is either
absent or invalid. The external synchronization timing source
for side B of the Stratum 3 clock, or for the secondary DS1
reference is not yet tested.
1 FAIL The external synchronization timing source for side B of the
Stratum 3 clock, or for the secondary DS1 reference is 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. See How to Replace the
Tone-Clock Circuit Pack in the TONE-BD section.
PASS The external synchronization timing source is valid.
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