Maintenance-Object Repair Procedures
555-233-143
8-1608 Issue 1 May 2002
8. If every test passes and the alarm does not resolve, retest (test
tone UUCSS long clear).
9. If the test passes, terminate the repair process. If the test fails,
replace the circuit pack at the customer’s convenience.
g. Tone-Clock circuit on-board maintenance has detected one or more clock
slips, timing differences between its internal reference source and the
synchronization signal provided by the master Tone-Clock. Although no
clock slip errors are expected during normal operation, both manual and
automatic interchanges of Tone-Clock circuit, synchronization references,
and PNCs, may result in clock slip counts.
If error 1281 also is logged for the same Tone-Clock circuit, it is related to
this problem and should be corrected first. Otherwise, continue with the
following procedure.
1. Use test tone-clock UUC, and examine the results of Test #149 to
see if slip errors are still occurring. If no new slip errors are
reported, and if these errors are not causing a TDM-CLK alarm, they
may be ignored. Use test tone-clock UUC long clear to clear the
errors.
2. Otherwise, enter the display errors command, and follow corrective
procedures for any other TDM-CLK, TONE-BD, SYNC, DS1C-BD,
EXP-INTF, SNC-BD, and SNI-BD errors logged, except for those in
Table 8-624.
3. If 1025 errors persist, see ‘‘SYNC (Port-Network Synchronization)’’
and follow the procedures in ‘‘Troubleshooting Approach’’.
Table 8-624. Error Log Entries for Slip Errors
Circuit Pack Name
Error Log
Name
Error Log Entry
for Slips
DS1 Interface DS1-BD 3073 to 3160
Expansion Interface EXP-INTF 2305
Switch Node Interface SNI-BD 1537
Tone-Clock TDM-CLK 1025
UDS1 Interface UDS1-BD 3073 to 3160
DS1C Circuit Pack DS1C-BD 3329
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