TAP-109 : Trouble Clearing 363-206-285
Page 1 of 4 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
Clear Abnormal (ABN) Indication
1.
NOTE:
The ABN LED indicates a manually caused abnormal condition. Table A
lists the conditions which may cause an ABN alarm. These conditions
may have been initiated locally, from another DDM-2000 at the other end
of the facility, or through telemetry.
Is the CR, MJ, MN,orPMN LED on the User Panel lighted?
If YES, then continue with Step 2.
If NO, then proceed to Step 4.
2.
NOTE:
It is better to clear the higher priority alarms (CR, MJ, etc.) first, although
in most cases this will not clear an ABN alarm. If the higher priority alarm
is cleared first, you can then use this procedure to clear the ABN alarm.
NOTE:
In some cases, clearing an ABN alarm will result in a higher priority
alarm being cleared. For example, clearing the abnormal condition
manual sync. mode switch may cause an excessive holdover
MJ alarm to clear.
Refer to Task Index IXL-001 for procedure to clear the indicated alarm.
3. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
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