Cause Codes (ISDN)

Last Updated : Oct 21, 2019 |
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When a call is ended, a cause code may be shown in the system monitor trace. The cause code is not an error as cause codes are shown at the end of normal calls.
  • Cause codes 0 to 102 are standard Integrated Services Digital Network (ISDN) cause codes. Causes codes 103 upwards are system specific codes.
To display cause codes, ensure that the System Monitor Call Extension Send option is enabled. The cause code is displayed as part of CMExtnTx: events within the monitor trace. For example:
10185mS CMExtnTx: v=100, p1=1
CMReleaseComp
Line: type=DigitalExtn 3 Call: lid=0 id=-1 in=0
UUI type=Local [....] [0x03 0x00 0x00 0x00 ]
Cause=16, Normal call clearing
Timed: 12/07/05 11:00