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Cisco Bug: CSCta86639 - Channel state is Busy/Idle(ISDN) after reload

Last Modified

Feb 22, 2014

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(18) 12.4(19.3)T

Description (partial)


AS5400 randomly reporting  ISDN channels busy after a while of operation. But in reality, there are no calls on those channels and also no modems are associated with those busy channels.  Also note that the total duration of usage is not incrementing for those stuck channels.

Show controller T1 6/1 call-counters reports

T1 6/1:   

  DS0's Active: 20
  DS0's Active High Water Mark: 22

  TimeSlot   Type   TotalCalls   TotalDuration

      1       pri          17       00:05:30
      2       pri          22       00:05:22
     16       pri          19       00:04:47
     17       pri           0       00:00:00 

Channel # 17 is stuck.


Issue has been observed on A5400 running 12.4(18).
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