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Table 526: Stratum-3 Clock Alarm Query Test (#649) 2 of 5
Error
Code
Test
Result
Description / Recommendation
Stratum-3 Clock Alarm Query (#649)
1 FAIL Either Reference A failed or CI card A failed. This condition usually
indicates a failure of the DS1 reference. However, there may also be a
failure of the CI card to which the reference is connected. The system
technician dispatched to investigate this problem should take a spare CI
card in case the CI card caused the failure.
If you are NOT ON-SITE, use the following procedure:
1. Enter display errors and look for DS1-BD errors. See DS1-BD
(DS1 Interface Circuit Pack) for the recommended repair procedures.
2. If there are no DS1-BD errors or after resolving every DS1-BD error,
enter test synchronization r 4 to see if the alarm still exists.
If every test repetition passes, the alarm no longer exists. Otherwise,
the system technician should be dispatched with a spare CI card to
use the following instructions on-site.
If you are ON-SITE, use the following procedure:
1. Look for a red LED on CI card A (i.e., the left CI card). If there is a red
LED, replace the CI card if a spare is available. If no spare CI is
available on-site, proceed to Step 3.
2. If, after replacing the CI card, the red LED on the new CI card also
lights, proceed to Step 3. Otherwise, enter test synch 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
errors, see DS1-BD (DS1 Interface Circuit Pack) for the
recommended repair procedures. If there are no DS1-BD errors, then
proceed to Step 4.
4. After every DS1-BD error has been resolved or if there are no
DS1-BD errors, enter test synch r 4 to clear the alarm and see if
the alarm still exists. If any test repetitions fail, follow the procedures
for those test failures.
5. Check the DS1 reference A connections to the Stratum-3 clock.
2 of 5
Communication Manager Release 5.0 Issue 4 January 2008 1789