Maintenance-Object Repair Procedures
555-233-143
8-1506
Issue 1 May 2002
8
FAIL
(cont’d)
If you are ON-SITE, use the following procedure:
1. Look for a red LED on a CI card B (the CI card on the right). If there is a
red LED, then replace the CI card, if a spare is available. If no spare CI is
available on-site, proceed to Step 3. If, after replacing the CI card, the red
LED on the new CI card lights, proceed to step 3.
2. Otherwise, enter test synchronization r 4 to clear the alarm. If any test
repetitions fail, follow the procedure for those failures.
3. Enter display errors and look for DS1-BD errors. If there are any, see
‘‘DS1-BD (DS1 Interface Circuit Pack)’’
. If there are no DS1-BD errors,
proceed to step 5.
4. After every DS1-BD error has been resolved, determine whether the alarm
still exists with test synchronization r 4. If any test repetitions fail, follow
procedures for those failures.
5. Check the DS1 reference A connections to the Stratum-3 clock.
6. Determine whether the alarm still exists with test synchronization r 4 to
clear the alarm. If any test repetitions fail, then follow procedures for those
failures.
16
FAIL
Every power supply failed.
1. Replace the failed power supplies.
2. If battery backup for the Stratum-3 clock is not supplied or if the battery
backup holdover time has been exceeded, then the system will be
referencing the local oscillator on the active TN780 Tone-Clock circuit pack
until software detects that one or both power supplies have been restored
(approximately 40 minutes). To speed up this restoration, issue the test
synchronization r 4 command. Every test should pass. If any repetitions
should fail, then follow the procedures for those failures. The battery
backup resides under the Stratum-3 clock’s carrier.
32
FAIL
Every clock unit failed.
1. Look at the Stratum-3 cabinet for red LEDs on circuit cards marked ‘‘ST3.’’
Replace the card(s).
2. To determine whether the alarm still exists, issue the test synchronization
r 4 command to clear the alarm. If any test repetitions fail, then follow the
procedures for those failures.
2101
FAIL
The TN780 Tone-Clock circuit pack detects loss of signal. See note h of the
STRAT-3 Hardware Error Log Entries table in the STRAT-3 (Stratum-3 Clock)
Maintenance documentation for replacement procedures.
PASS
The Stratum-3 clock has reported that it has no alarm conditions. If
synchronization problems have been reported, look for SYNC errors and see
‘‘SYNC (Port-Network Synchronization)’’
for recommended strategy for those
errors.
Table 8-588.
TEST #161 Loop-Around Test —
Continued
Error
Code
Test
Result
Description / Recommendation
Continued on next page
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...