AudioControl VERSION 6.2 SIP Release Notes, Supported Features, 4xx Response, Comments, Version

SIP Release Notes				2. Supported Features
	4xx Response		Supported	Comments
420		Bad Extension	Yes	The device doesn't generate this response. Upon receipt of
				this message and before a 200 OK has been received, the
				device responds with an ACK and disconnects the call.
423		Interval Too	Yes	The device does not generate this response. On reception
		Brief		of this message the device uses the value received in the
				Min-Expires header as the registration time.
433		Anonymity	Yes	If the device receives a 433 Anonymity Disallowed, it sends
		Disallowed		a DISCONNECT message to the PSTN with a cause value
				of 21 (Call Rejected). In addition, the device can be
				configured, using the Release Reason Mapping, to generate
				a 433 response when any cause is received from the PSTN
				side.
480		Temporarily	Yes	If the device receives a 480 Temporarily Unavailable
		Unavailable		response, it notifies the User with a Reorder Tone.
				This response is issued if there is no response from remote.
481		Call	Yes	The device doesn't generate this response. Upon receipt of
		Leg/Transaction		this message and before a 200 OK has been received, the
		Does Not Exist		device responds with an ACK and disconnects the call.
482		Loop Detected	Yes	The device doesn't generate this response. Upon receipt of
				this message and before a 200 OK has been received, the
				device responds with an ACK and disconnects the call.
483		Too Many Hops	Yes	The device doesn't generate this response. Upon receipt of
				this message and before a 200 OK has been received, the
				device responds with an ACK and disconnects the call.
484		Address	Yes	The device doesn't generate this response. Upon receipt of
		Incomplete		this message and before a 200 OK has been received, the
				device responds with an ACK and disconnects the call.
485		Ambiguous	Yes	The device doesn't generate this response. Upon receipt of
				this message and before a 200 OK has been received, the
				device responds with an ACK and disconnects the call.
486		Busy Here	Yes	The SIP device generates this response if the called party is
				off-hook and the call cannot be presented as a call waiting
				call. Upon receipt of this response, the device notifies the
				User and generates a busy tone.
487		Request	Yes	This response indicates that the initial request is terminated
		Canceled		with a BYE or CANCEL request.
488		Not Acceptable	Yes	The device doesn't generate this response. Upon receipt of
				this message and before a 200 OK has been received, the
				device responds with an ACK and disconnects the call.
491		Request	Yes	When acting as a UAS: the device sent a re-INVITE on an
		Pending		established session and is still in progress. If it receives a
				re-INVITE on the same dialog, it returns a 491 response to
				the received INVITE.
				When acting as a UAC: If the device receives a 491
				response to a re-INVITE, it starts a timer. After the timer
				expires, the UAC tries to send the re-INVITE again.

Version 6.2 125 December 2010