Maintenance-Object Repair Procedures
555-233-143
8-1614 Issue 1 May 2002
TDM Bus Clock Slip Inquiry Test (#149)
This test evaluates the quality of the synchronization source for the IPSI circuit
pack’s Tone-Clock circuit or Tone-Clock circuit pack.
NOTE:
This test does not apply to the TN2182.
Table 8-626. Test #149 TDM bus Clock Slip Inquiry Test
Error
Code
Tes t
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.
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 up to 5 times.
Any FAIL The error code represents the number of timing slips detected on the incoming
synchronization source since the last slip inquiry was sent to the Tone-Clock
circuit pack. The incoming synchronization signal can be from one of four
sources:
1. A DS1 Interface circuit pack, if DS1 Synchronization is administered, and
associated with the circuit pack tested.
2. A Stratum-3 clock, if that option is administered and the circuit pack tested
was the active Tone-Clock in the EPN 1.
3. The local oscillator on the master IPSI’s Tone-Clock circuit or on the
master Tone-Clock circuit pack, if it is providing the system’s clocking
signals.
4. An EXP-INTF circuit pack, if the EPN on which the test was executed does
not contain the system’s current synchronization reference.
The error code is a variable amount ranging from 1 to 255.
1. Small numbers of slips should not result in service degradation. If the error
code is small (1 or 2), rerun the test. If the error only occurs infrequently, it
may be ignored.
2. Otherwise, see ‘‘Troubleshooting Approach’’ in the ‘‘SYNC (Port-Network
Synchronization)’’ section of this manual.
PASS The IPSI or Tone-Clock circuit pack does not detect any timing slips. This
indicates that the incoming synchronization timing source is valid or that the
system’s synchronization reference is an IPSI or 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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