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7. Operation and Maintenance
9128-A2-GB20-80 September 2002
7-43
Facility Rejected 29 Requested facility is not
provided by the network.
No action is needed.
Incoming Calls
Barred
54 Called user is not permitted
to accept the call.
Turn off network call
screening.
Incompatible
Destination
88 Request to establish a call
has been received, but
low-layer, high-layer, or
another compatibility
attribute (e.g., data rate)
cannot be provided.
Incorrect format of the
destination link.
Arrange for the desired
capability.
Identified Channel
Does Not Exist
82 Channel requested for a call
is not activated on the
interface.
Make sure the network is
configured for 2B service, if
a BRI DBM. Contact your
service provider to verify
that your service is
provisioned for two
B-channels.
Info Element
Nonexistent or
Nonimplemented
99 Device sending this cause
has received a message it
does not recognize.
This cause will not prevent
the message from being
precessed.
1. Verify that the Inbound
Calling ID has been
defined.
2. Verify that the Inbound
Calling ID is part of your
service.
Interworking,
Unspecified
127 Precise cause of a
message cannot be
determined because the
interworking network does
not provide causes.
No action is needed.
Invalid Call
Reference Value
81 Call reference used is not
currently in use on the
user-network interface.
Contact your service
representative.
Invalid Info Element
Contents
100 Device sending this cause
has received and
implemented an information
element, but one or more
fields in the element cannot
be processed.
Contact your service
representative.
Invalid Message,
Unspecified
95 No other cause in the
invalid message class
applies for this invalid
message event.
Contact your service
representative.
Invalid Number
Format – Incomplete
Address
28 Call cannot be completed
because the phone number
is incorrect or incomplete.
Check your ISDN link
profile, and correct the
number.
Table 7-14. Most Recent and Previous Cause Value Messages (2 of 6)
Message
Cause
No. What It Indicates What To Do