Lucent Technologies Release 7 clock slips

DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4 June 1999
Maintenance Object Repair Procedures
9-1724TDM-CLK (TDM Bus Clock)
9
8. If all tests pass and the alarm d oes not resolve, retest (test tone
UUCSS long clear).
9. If the test passes, terminate the repair p rocess. If the test fails,
replace the circuit p ack at the customer’s c onvenience.
g. Tone-Clock circuit pack on-b oard maintenance has detec ted one or more
clock slips , timing differences b etween its internal reference source and
the synchronization signal provid ed by the master Tone-Clock. Although
no clock slip errors are exp ected during normal operation, both manual
and automatic interchang es of Tone-Clock circuit packs, sync hronization
references, and PNCs, may result in clock s lip counts.
If error 1281 also is logged for the same Tone-Clock circuit pack, it is
related to this problem, and should be corrected first. Otherwise, continue
with the procedure bel ow.
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 proced ures for any other TDM-CLK, TONE-BD, SYNC,
DS1C-B D, EXP-IN TF, SNC-B D, and SNI-B D erro rs log ged , exc ept
for those in Table 9-645.
3. If 1025 errors persist, refer to SYNC Maintenance in this manual
and follow the proced ures in the "Approach to Troubleshooting"
section.
h. Error Type 1281This error is an indication that the Tone-Clock circuit
pack has detec ted a loss of timing signal from the system sync hronization
reference. The Tone-Clock circuit pack has switc hed synchronization
references.
1. Resolve any errors logged ag ainst the SYNC or STRAT-13
maintenance objects.
Table 9-645. 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