Polycom VS4000 manual Status Inquiry

Administrator’s Guide for ViewStation EX, ViewStation FX, and VS4000

Code	Cause	Definition
16	Normal call clearing	The originator or receiver of the call has requested that
		it be cleared.
17	User busy	All B channels are in use; the called system
		acknowledges the connection request, but is unable to
		accept the call.
18	No user responding	The destination equipment does not respond to the call,
		so the connection cannot be completed.
19	No answer from user	The destination equipment did not complete the
	(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22	Number changed	The ISDN number used to set up the call is no longer
		valid.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, but did
	clearing	not assign it to the user.
27	Destination out of	A signaling message cannot be delivered because the
	order	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 in an
	format	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 receives a
	STATUS INQUIRY	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 equipment	The destination cannot be reached because the
	congestion	network switching equipment is temporarily overloaded.

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