Cause Codes (ISDN)

Last Updated : Oct 21, 2019 |
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