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TDM-CLK (TDM Bus Clock)
Issue 1 June 2005 2267
Standby Reference Health Check Test (#651)
This test evaluates the quality of the external synchronization timing source for a standby IPSI
or Tone-Clock circuit pack. Every administered synchronization timing source must be valid for
this test to pass. If the Tone-Clock circuit and the synchronization timing sources are in different
port networks, the EI circuit packs transport the timing sources to the tone-clock.
Table 813: Test #651 Standby Reference Health Check Test
Error
Code
Test
Result
Description / Recommendation
ABRT 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 five times.
1184 ABRT 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 ABRT 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 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. See SYNC
(Port-Network Synchronization) on page 2143.
2. If the error still exists, replace the IPSI or Tone-Clock circuit pack
reported in the error log. See Replacing the IPSI or Tone-Clock Circuit
Pack on page 2337.
PASS The external synchronization timing source is valid.