Avaya Definity SI, Maintenance Manual, Page: 2518 / 2968

Maintenance Object Repair Procedures
555-233-123 10-1732 Issue 4 May 2002
TDM Bus Clock PPM Inquiry Test (#150)
This test evaluates the quality of the synchronization source for the Tone-Clock
circuit pack.
Table 10-638. TEST #150 TDM Bus Clock PPM Inquiry Test
Error
Code Test
Result Description/Recommendation
ABORT The system could not allocate the necessary resources for
the test.
1001 ABORT The system could not allocate the necessary resources for
the test.
1. Wait 1 minute, and retry the test.
255 ABORT The Tone-Clock circuit pack was using its local oscillator
rather than synchronizing to an external source.
1. Verify that this Tone-Clock circuit pack is expected to be
the synchronization source. If not, correct the
synchronization information and re-execute the test.
2000 ABORT Response to the test request was not received within the
allowable time period.
2100 ABORT System resources required to run this test are not available.
1. Retry the command at 1-minute intervals a maximum of
5 times.
Any FAIL The error code represents the rate (in Parts Per Million, or
PPM) at which clock slip errors have been detected on the
incoming synchronization source since the last PPM inquiry
was sent to the Tone-Clock circuit pack. A failure of this test
indicates that we are outside of Stratum 4 or Stratum 3 timing
specifications on the incoming timing source.
The error code is a variable amount ranging from 1 to 254.
1. If error 1537 is entered in the hardware error log against
TDM-CLK, then the board has switched timing sources.
Follow the procedures associated with hardware log
error code 1537.
2. Otherwise, refer to “Approach to Troubleshooting” in the
Synchronization (SYNC) Maintenance section of this
manual.
PASS The Tone-Clock circuit pack does not detect timing any PPM
errors. This indicates that the external synchronization timing
source is valid or that the system synchronization reference
is a Tone-Clock circuit pack. The status synchronization
command should be used to verify that the desired
synchronization reference is providing timing for the system.
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