Maintenance and Troubleshooting
5-15
9621-A2-GB20-30
August 1997
Message
What To Do
What It Indicates
Cause
No.
Channel type not
implemented
66
Device sending this cause
does not support the
requested channel type.
Try another network.
Channel
unacceptable
6
Channel identified for the
call is not acceptable to the
receiving device.
Retry at another time.
Destination out of
order
27
Destination interface
specified is not functioning
correctly so the signalling
message could not be
delivered (e.g., physical or
data-link layer failure at the
remote end, user
equipment is off-line).
Retry at another time.
Facility rejected
29
Requested facility is not
provided by the network.
No action 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.
1. Check the configured
attribute.
2. Change the appropriate
attribute configuration
option (e.g., change
data rate).
Identified channel
does not exist
82
Channel requested for a
call is not activated on the
interface.
Make sure network is
configured for
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.
Verify that the Calling ID
has been defined.
Verify that the 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 needed.
Invalid call
reference value
81
Call reference used is not
currently in use on the
user-network interface.
Contact your service
representative.
