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Re: [Linphone-users] SIP Session Timers

From: Dan Le
Subject: Re: [Linphone-users] SIP Session Timers
Date: Wed, 9 Feb 2011 12:08:48 -0500

Thanks for the response Simon. 

The RTP timer seems to work great as long as it has received at least one RTP packet for the session to start the timer, but if the incoming call silently terminates before RTP has started, the call remains up indefinitely, which is why I was looking for a SIP session timer solution. Is there anything else I could try?


On Mon, Feb 7, 2011 at 3:29 PM, Simon Morlat <address@hidden> wrote:
Hi Dan,

Actually what is implemented when use_session_timers=1 is accepting SIP
updates and answering correctly to them, but linphone does not send any
SIP update or reINVITE to check the session is alive.
However it detects loss of RTP streams, after 30 seconds of RTP
inactivity (RTP and RTCP), then it hangups the call.


Le mardi 01 février 2011 à 19:43 -0500, Dan Le a écrit :
> Hi, I'm newly joined to the mailing list, and was hoping someone could
> clarify a few things in linphone.
> There's scattered reports that SIP Session Timers (RFC 4028) may be
> supported in linphone, but attempting to enable it, I can't seem to
> trigger it. I'm using version 3.3.2 of linphone.
> I've set use_session_timers=1 under [sip] in my linphonerc config
> file, and then dial the linphonec agent; after the call connects, I
> kill the call on the originator side. Linphone appears to be still in
> the call, and I would expect after some time, it would send a SIP
> packet to check if the call exists (and subsequently terminating the
> call when it find it no longer exists), but it doesn't, at least not
> after 5min of waiting.
> I would be grateful for any insights.
> Thanks,
> Dan
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