Maintenance Object Repair Procedures
555-233-123
10-1564 Issue 4 May 2002
Stratum 3 Clock Alarm Query (#649)
The Stratum 3 clock provides the system with the following six alarm indications
via the TN780 Tone-Clock circuit pack:
1. Reference A failed or CI card A failed.
2. Reference B failed or CI card B failed.
3. One power supply failed.
4. All power supplies failed.
5. One clock unit failed.
6. All clock unit(s) failed.
This test queries the Stratum 3 clock for its alarm status (through the TN780
Tone-Clock circuit pack) and reports the results of the query.
!
WARNING:
The removal of a card in the Stratum 3 clock may cause alarm(s) to be
resolved and the query test to pass. However, the removed cards should still
be replaced to restore the Stratum 3 clock to full service.
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