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

[Olivier]

2008/1/8, Steve Langstaff <steve.langstaff at citel.com>:
>
>  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?
>

Yes, you're right but RFC3261 doesn't specify such 302 replies.
So I'm very pessimistic about my phone supplier answer.



------------------------------
> *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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