RE: [Serusers] Problem with cancel a invite - sr-users

26 Jun 2005

Hi All,

Another problem related with INVITE and CANCEL:

A makes call to B.
A cancels the call before B picks up the call.
If the proxy receives the "100 trying" and "180 ringing" before A
sends CANCEL, the CANCEL is sent by the proxy to B.
But if the proxy only receives the "100 trying" before A sends CANCEL (a very
fast cancel), The CANCEL is never sent by the proxy to B.

Regards,
Toni

-----Original Message-----
From: serusers-bounces(a)iptel.org [mailto:serusers-bounces@lists.iptel.org] On Behalf Of
Marian Dumitru
Sent: segunda-feira, 13 de Junho de 2005 11:24
To: Greger V. Teigre
Cc: Anders Hansson; serusers(a)lists.iptel.org
Subject: Re: [Serusers] Problem with cancel a invite

Hi Greger,

CANCEL has nothing to do with loose route - and it will never hit he 
loose route. The Route ser is set only when the dialog is established 
(200 ok); and CANCEL happens *before* the dialog completion.

The big idea with CANCEL is to take care to route it *exactly* as its 
INVITE.

As a hint, if you use TM, t_relay() all the time will take care to send 
the CANCEL to same destination as INVITE.

regards,
Marian

Greger V. Teigre wrote:
...
  Most likely you don't handle the CANCEL messages
correctly. May be that 
 you don't do proper loose route handling.  Take a look at the example 
 configs (and the Getting Started document) at http://onsip.org/  You 
 gain much be following the logic found there, they have been verified 
 for all kinds of situations...
 g-)

 Anders Hansson wrote:

> Hi all,
> I´ve got a problem when trying to cancel an invite.
> The situation: A makes a call to B (INVITE). B press the "hang up"
> button. An here comes the problem.
> From As side, everything is OK, but from Bs side, the phone is still
> ringing...
> How can a solve this problem? Anyone?
>
> Thanks,
> Anders 
-- 
Voice System
http://www.voice-system.ro

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