No subject

minute. Therefore it's a bug in Asterisk.

- Raj
 

> -----Original Message-----
> From: asterisk-dev-bounces at lists.digium.com 
> [mailto:asterisk-dev-bounces at lists.digium.com] On Behalf Of 
> Alex Balashov
> Sent: Friday, November 02, 2007 5:41 PM
> To: asterisk-dev at lists.digium.com
> Subject: [asterisk-dev] UAC leg cancel on early media / MoH.
> 
> 
> 
> Hi folks,
> 
> I ran into a problem where SIP calls were being dumped 
> straight into a queue without being Answer()'d.  Music on 
> hold from the queue was being generated via 183 Session in 
> Progress + SDP, i.e. early media / in-band ringback.
> 
> After about 3 minutes of this, all SIP UACs I tested with 
> would CANCEL the leg, resulting in the caller being dropped 
> out of the queue.  This happened with a Cisco 7960 (SIP 
> image), Polycom 501, and tne X-lite softphone.
> 
> Anyway, I fixed the problem by simply furnishing an Answer() 
> in the dial plan, of course, but I was curious as to why SIP 
> UACs react this way.  I could not find any explanation for 
> this in reviewing the various SIP T-timers in the RFC, or the 
> various RFCs and drafts dealing with early media.
> 
> In other words, I see no reason why the calling SIP agent 
> should terminate the call after 3 minutes since the 183 + SDP 
> have elapsed.  What gives?
> 
> Thanks,
> 
> --
> Alex Balashov
> Evariste Systems
> Web    : http://www.evaristesys.com/
> Tel    : +1-678-954-0670
> Direct : +1-678-954-0671
> 
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