[asterisk-users] Reproducible ReInvites sent by UAS after exactly 900s despite session-timers=refuse

Michael Maier m1278468 at allmail.net
Tue Dec 27 14:10:25 CST 2016

On 12/27/2016 at 07:54 PM, Michael Maier wrote:
> Hello!
> I'm facing ReInvites as caller from UAS despite configured
> session-timers=refuse (which can be seen in the SIP trace) always after
> 900s. (The behavior is the same if session-timers is set to accept).
> This just happens with one provider (German Telekom to callee at kabelbw).
> - The incoming ReInvite is answered immediately by asterisk (Status 100
>   / Status 200 - 0.02s). Media stream is ok.
> - 0.04s after sending of Status 200, the media stream from callee is
>   stopped.
> - 0.11s after the Status ok package has been sent, the Ack package of
>   the UAS can be seen.
> - 10s after the arrival of the ack package, UAS sends options packages,
>   every 10s one package. Each of these packages is immediately answered
>   by asterisk with Status 200 ok.
> - After 31s seconds, asterisk drops the call because of lack of rtp
>   stream from callee.
> Used asterisk version is 13.13.1.

I tested the exactly same call with another provider (Easybell).
Easybell doesn't support timer at all.

Via Easybell, the call is dropped after 15 minutes, too, but now, it is
ended with RTCP 203 (Good bye) by the callee. 10s later, the callee
sends a SIP bye.

> Does anybody has any idea about what's going on here? This problem isn't
> just an actual problem, it can be seen since a few weeks now and is
> *always* reproducible (I can provide a trace). I don't think there is a
> network problem, because the audio quality before is really good. There
> isn't any firewall related problem, too - there are no dropped packages
> at all.
> Thanks,
> Michael

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