[asterisk-users] How to check if a SIP phone is forwardedwithout ringing it ?

[Steve Langstaff]

That's going to be pretty phone-specific. How about asking your phone
supplier to fix their phone so that it responds to OPTIONS correctly?


________________________________

	From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Olivier
	Sent: 08 January 2008 12:50
	To: Asterisk Users Mailing List - Non-Commercial Discussion
	Subject: Re: [asterisk-users] How to check if a SIP phone is
forwardedwithout ringing it ?
	
	
	2008/1/7, Kevin P. Fleming <kpfleming at digium.com>: 
	

		Olivier wrote:
		
		> Is there way for an Asterisk server to check if a sip
phone is forwarded
		> without bothering phone's user ?
		
		No.
		
		> I was thinking of some Alert-Info option that would
let the phone reply 
		> with a 302 Moved Temporarily or 182 Queued message and
not let the phone
		> ring or display anything on its screen.
		
		According to the SIP RFC, a SIP endpoint is supposed to
respond to an
		OPTIONS message the same way that it would respond to an
INVITE message 
		with the identical destination, but I've never seen a
phone respond to
		an OPTIONS message with anything but '200 OK', even when
a redirect
		(forward) is in place.


	So, the alternative option is to play with html and use phone
embedded html server to get this redirection data. 
	
	Cheers
	


		--
		Kevin P. Fleming
		Director of Software Technologies
		Digium, Inc. - "The Genuine Asterisk Experience" (TM) 
		
		


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