Cisco Bug: CSCte51183 - T1/E1 controller stays down even if alarm-trigger condition cleared
Jan 28, 2017
- Cisco IOS
Known Affected Releases
12.4(19.10) 12.4(19.10)T 12.4(24)T2 12.4(25b)M0.16 15.0(1)M1.6
Symptom: ======== A T1/E1 controller configured for <CmdBold>alarm-trigger blue<noCmdBold> remains in a DOWN state and transmits Blue Alarm (Alarm Indication Signal, or AIS) even when the trigger condition for the Blue Alarm has cleared. Proper function is that when the trigger condition has cleared, the T1/E1 controller should automatically recover itself into an UP state. Conditions: =========== This behaviour will be observed on a Cisco Voice GateWay which has been configured for "connection trunk", and which has been set for the "T1/E1 Alarm Conditioning for Switched Calls and Permanent Connection Trunks" feature. Even when all voice-port busyout conditions have been cleared, the T1/E1 controllers for these voice-ports will remain DOWN and continue to send AIS. Known affected IOS versions are 12.4(19.10) and newer in the 12.4 mainline release train, 12.4(19.10)T and newer in the 12.4T release train, and all releases of 15.0M and 15.1T. Also see defect ID CSCte76068 "T1/E1 alarm-trigger blue command unconfigured when busyout occurs".
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