Appendix C – ISDN Cause Numbers C-4 FlexSet 120S/280S User Guide
Cause #
CODE MEANING ACTION
55
incoming calls barred within GUG
56
call waiting not subscribed
57
bearer capability not authorized notify system manager
58
bearer capability not presently available call later
63
service or option not available, unspecified notify system manager
65
bearer capability not implemented check destination is correct, try again from different
compatible terminal, notify system manager if message
returns
66
channel type not implemented notify system manager
67
transit network selection not implemented
68
message not implemented
69
requested facility not implemented notify system manager
70
only restricted digital information bearer capability is
available
notify system manager
79
service or option not implemented, unspecified notify system manager
81
invalid call reference value notify system manager
82
channel does not exist
83
a suspended call exists, but this call identity does not
no action∗
∗ If the message returns frequently notify system manager
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