Avaya 03-300430 User Manual

If the alarm is MAJOR:

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Check connections between the Stratum-3 clock and the switch. 

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If there are no loose connections, use the Stratum-3 Wiring Guide and check that the 
wiring installation is correct. 

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After reconnecting the loose connection or correctly rewiring it, clear the alarm by issuing 
disable synchronization-switch, followed by enable 
synchronization-switch. 

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Wait 1 minute, then run status synchronization. 

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If Maintenance Name on the status screen shows “STRAT-3,” then the problem is 
resolved.

If the Standby Tone-Clock circuit pack became active:

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Check the connection between the Stratum-3 clock and the TN780 Tone-Clock circuit 
pack from which the system has just switched.

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If there are no loose connections, then, replace the circuit pack containing the TN780 
Tone-Clock circuit pack. 

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Before switching back to the new TN780 Tone-Clock circuit pack, use test 
tone-clock location long to check that the Tone-Clock is receiving a signal from 

the Stratum-3 clock. 

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If every test passes, switch to the new Tone-Clock circuit pack using set tone-clock 
location override. 

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If Test #651 fails, then the original TN780 Tone-Clock circuit pack should be reinserted, 
and the cable between the Stratum-3 clock and the TN780 Tone-Clock circuit pack 
should be replaced.

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If Test #651 continues to fail, then escalate the problem.

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If slip alarms exist after following the repair procedures for any of the previous cases, 
clear the slip alarms by running test board clear. See 

on page 2133 for a list of circuit packs and associated slip error log entries.

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This error indicates that the Tone-Clock circuit pack in the master port network is not a 
TN780. If duplicate Tone-Clock circuit packs exist in the master port network, this error 
may mean that one or both Tone-Clock circuit packs are not TN780s. Verify that the 
Tone-Clock(s) in the master port network are TN780s.

h. Error Type 1281: this Error Type corresponds to FAIL code 32 of the Stratum-3 Clock Alarm 

Query test (#649): every clock unit failed.

i. Error Type 1537: An OFF-BOARD alarm on the Stratum-3 clock, indicates a DS1 facility 

problem; an ON-BOARD alarm indicates a fault in either the Stratum-3 clock or the 
connection between the Stratum-3 clock and the switch. If the Stratum-3 clock cannot be 
referenced and the local oscillator on the TN780 Tone-Clock circuit pack must serve as the 
reference, a Major alarm is raised. Otherwise, a Minor alarm is raised.