Polycom EX4000, FX4000, VS4000, EX, FX, VS4000 manual Isdn Error Codes, Code Cause Definition

Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000

ISDN Error Codes

The following table describes codes that the ISDN switch sends to the router to indicate call status. Although the codes are standardized, each ISDN service provider defines them differently. Because of this, the definitions in the table may not exactly match the messages that appear on your monitor.

Table 6-7. ISDN Call Status Codes

Code	Cause	Definition
1	Unassigned	The switch received the sent ISDN number
	number	in the correct format, but no destination
		equipment uses the number.
2	No route to	The ISDN exchange does not recognize the
	specified transit	intermediate network through which to route
	network	the call.
3	No route to	The intermediate network through which the
	destination	call is routed does not serve the destination
		address.
6	Channel	The specified channel does not provide
	unacceptable	adequate service quality to accept the
		requested connection.
7	Call awarded	The user is assigned an incoming call that is
	and delivered	being connected to a call channel that has
		already been established for this user and
		this type of call.
16	Normal call	The originator or receiver of the call has
	clearing	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	The destination equipment does not
	responding	respond to the call, so the connection
		cannot be completed.
19	No answer from	The destination equipment did not complete
	user (user	the connection within the prescribed time
	alerted)	after responding to the connection request.
		The problem is at the remote end of the
		connection.

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