Appendix C – ISDN Cause Numbers
C-6
FlexSet 120S/280S User Guide
Cause #
CODE MEANING
ACTION
101
message not compatible with call state
notify system manager
102
recovery on timer expiry
no action
∗
103
mandatory information element length error
111
protocol error, unspecified
notify system manager
112
type of protocol not available
113
ISUP not available
127
interworking, unspecified
notify system manager
∗
If the message returns frequently notify system manager