Comtrol InterChange VS 3000 Series Installation And Configuration Manual page 56

ISDN Cause Codes
Table 5. ISDN Cause Codes (Continued)
Decimal Brief Description
Preemption (circuit
9
reserved for reuse)
16 Normal call clearing
17 User busy
18 No user responding
No answer from user
19
(User alerted)
20 Subscriber absent
21 Call rejected
22 Number changed
Non-selected user
26
clearing
Destination
27
out of order
56
Expanded Description
The call is being pre-empted and the
circuit is reserved for reuse by the pre-
empting exchange.
The call is being cleared because one of
the users participating in the call has
requested that the call be cleared.
The called party is unable to accept
another call because the user busy
condition has been encountered (by the
called user or by the network). If the user
is busy, it is noted that the user
equipment is compatible with the call.
The called party does not respond to a call
establishment message with either an
alerting or connect indication within the
allocated time period.
The called party has been alerted but
does not respond with a connect
indication within the allocated time
period. This is not necessarily generated
by Q.931 procedures but may be
generated by internal network timers.
A mobile station has logged off, radio
contact is not obtained with a mobile
station, or a personal telecommunications
user is temporarily not addressable at
any user-network interface.
The equipment sending does not accept
this call. The equipment is neither busy
nor incompatible. This can be generated
by the network, indicating that the call
was cleared by a supplementary service
constraint.
The called-party number is no longer
assigned. The new called-party number
may be included in the diagnostic field.
The user has not been awarded the
incoming call.
The destination cannot be reached
because the interface to the destination is
not functioning. A signal message was not
delivered to the remote party because of a
physical layer or data link layer failure at
the remote party, or the user equipment
is off-line.