As using OPTIONS requests main benefit is to non-phone specific, what shall we do when most vendors do not comply with RFC ?<br><br><div><span class="gmail_quote">2008/1/9, Raj Jain <<a href="mailto:rj2807@gmail.com">rj2807@gmail.com
</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">This issue of phone vendors not supporting OPTIONS according to RFC 3261<br>
often comes up on this list. Like Kevin Fleming said, an OPTIONS request is<br>supposed to be responded in the same way as an INVITE. Almost all SIP phone<br>vendors have construed OPTIONS as some kind of a keep-alive request, which
<br>is wrong.<br><br>Can we ask the phone vendors to play by the book?<br><br>--<br>Raj<br><br><br>________________________________<br><br> From: <a href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com
</a><br>[mailto:<a href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a>] On Behalf Of Olivier<br> Sent: Tuesday, January 08, 2008 7:50 AM<br> To: Asterisk Users Mailing List - Non-Commercial Discussion
<br> Subject: Re: [asterisk-users] How to check if a SIP phone is<br>forwardedwithout ringing it ?<br><br><br> 2008/1/7, Kevin P. Fleming <<a href="mailto:kpfleming@digium.com">kpfleming@digium.com</a>>:
<br><br> Olivier wrote:<br><br> > Is there way for an Asterisk server to check if a sip<br>phone is forwarded<br> > without bothering phone's user ?<br><br> No.
<br><br> > I was thinking of some Alert-Info option that would let<br>the phone reply<br> > with a 302 Moved Temporarily or 182 Queued message and not<br>let the phone<br> > ring or display anything on its screen.
<br><br> According to the SIP RFC, a SIP endpoint is supposed to<br>respond to an<br> OPTIONS message the same way that it would respond to an<br>INVITE message<br> with the identical destination, but I've never seen a phone
<br>respond to<br> an OPTIONS message with anything but '200 OK', even when a<br>redirect<br> (forward) is in place.<br><br><br> So, the alternative option is to play with html and use phone
<br>embedded html server to get this redirection data.<br><br> Cheers<br><br><br><br> --<br> Kevin P. Fleming<br> Director of Software Technologies<br> Digium, Inc. - "The Genuine Asterisk Experience" (TM)
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