Polycom 1 manual Status Inquiry

PathNavigator Errors and Q.850 Cause Codes

Code	Cause	Definition
18	No user responding	The destination equipment does not respond to
		the call, so the connection cannot be completed.
19	No answer from	The destination equipment did not complete the
	user (user alerted)	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22	Number changed	The ISDN number used to set up the call is no
		longer valid.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	The destination is capable of accepting the call,
	clearing	but did not assign it to the user.
27	Destination out of	A signaling message cannot be delivered because
	order	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	Destination address was incomplete or presented
	format	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	The equipment returns this message when it
	STATUS INQUIRY	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	The call cannot be taken because no appropriate
	available	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	The destination cannot be reached because the
	equipment	network switching equipment is temporarily
	congestion	overloaded.

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