Polycom 1 - Manual (Page 161)

PathNavigator Errors and Q.850 Cause Codes
C - 5
18 No user responding The destination equipment does not respond to
the call, so the connection cannot be completed.
19 No answer from
user (user alerted) The destination equipment did not complete the
connection within the prescribed time after
responding to the connection request. The
problem is at the remote end of the connection.
21 Call rejected The destination equipment is capable of accepting
the call, but has rejected it for an unknown reason.
22 Number changed The ISDN number used to set up the call is no
longer valid. (The diagnostic field of the message
may return an alternate address assigned to the
called equipment.)
26 Non-selected user
clearing The destination is capable of accepting the call,
but did not assign it to the user.
27 Destination out of
order A signaling message cannot be delivered because
the interface is not functioning correctly, and the
destination cannot be reached. This condition
might be temporary; for example, remote
equipment might be turned off.
28 Invalid number
format Destination address was incomplete or presented
in an unrecognizable format, which prevented the
connection from being established.
29 Facility rejected The network cannot provide the facility requested
by the user.
30 Response to
STATUS INQUIRY The equipment returns this message when it
receives a STATUS INQUIRY message.
31 Normal, unspecified A normal event has occurred with no standard
cause applying. No resulting action is required.
34 No circuit/channel
available The call cannot be taken because no appropriate
channel is available to establish the connection.
38 Network out of order A network problem prevented the call from
reaching its destination. Attempts to reconnect will
probably fail until the network problem is
corrected.
41 Temporary failure A network error occurred. The problem will be
resolved shortly. Attempts to reconnect may
succeed.
42 Switching
equipment
congestion The destination cannot be reached because the
network switching equipment is temporarily
overloaded.
Code Cause Definition