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STRAT-3 (Stratum-3 Clock)
Issue 1 June 2005 2135
j. Error Type 1793: this error can be caused by one of the following conditions:
● One or both TOCs (Timing Output Cards) has failed.
● The connection between the Stratum-3 clock and the TN780 Tone-Clock circuit pack is
faulty.
● The TN780 Tone-Clock circuit pack is defective.
System Technician-Demanded Tests:
Descriptions and Error Codes
The test synchronization command also runs the Test Synchronization test (#417). Test
417 is described in SYNC (Port-Network Synchronization)
on page 2143.
Stratum-3 Clock Alarm Query (#649)
This test queries the Stratum-3 clock for its alarm status and reports the results of the query.
The Stratum-3 clock provides the system with the following six alarm indications via the TN780
Tone-Clock circuit pack:
● Reference A failed or CI card A failed.
● Reference B failed or CI card B failed.
● One power supply failed.
● Every power supply failed.
● One clock unit failed.
● Every clock unit failed.
!
CAUTION:
CAUTION: 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.
Order of Investigation Short Test
Sequence
Long Test
Sequence
D/ND
Stratum-3 Clock Alarm Query (#649) X X ND