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SYNC (Synchronization)
Issue 5 October 2002
1601
555-233-119
g. The following steps should be executed to resolve error 2049 and 2305:
1. Check for timing loops, and resolve any loops that exist.
2. Error 2049:
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Test the Tone-Clock circuit packs in the master and slave port
networks via the test tone/clock PC long command. Check
the Error Log for TDM-CLK errors and verify that TDM Bus
Clock Test #148 passes successfully. If Test #148 fails with
an Error Code 2 through 32, refer to “TDM-CLK” to resolve
the problem. If not, continue with the following steps.
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If the system synchronization reference is a Tone-Clock
circuit pack and the master Tone-Clock circuit pack fails TDM
Bus Clock Test #150, follow the steps listed in “TDM-CLK” to
replace the master Tone-Clock circuit pack.
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If the system synchronization reference is a DS1 interface
circuit pack and the master Tone-Clock circuit pack fails TDM
Bus Clock Test #150, the primary or secondary (if
administered) synchronization references are not providing
valid timing signals for the system. Check the system
synchronization references administered, and follow the
steps outlined in note (a) if the primary synchronization
reference is providing timing for the system or note (c) if the
secondary synchronization reference is providing timing for
the system.
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If the slave Tone-Clock circuit pack fails the TDM Bus Clock
Test #150 but the master Tone-Clock does not fail this test,
the master Tone-Clock circuit pack must be replaced. Follow
the Tone-Clock replacement steps listed in the “TDM-CLK”.
If SLIP errors remain follow SLIP ANALYSIS.
3. Error 2305:
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If the problem persists, replace the Tone-Clock circuit pack in
the slave port network. Follow the steps listed in “TDM-CLK”
to replace the Tone-Clock circuit pack.
h. Noise on the DS1 line can cause transient alarms on synchronization.
Therefore, when a synchronization problem occurs causing error types 1,
257, or 513, a WARNING alarm is first raised for 15 to 20 minutes before
the alarm is upgraded to a MAJOR or MINOR alarm.