[Freeswitch-users] Trunking between Lync and FreeSWITCH

[Kristian Kielhofner]

Interesting.  Can you put a sip trace up between Lync and FreeSWITCH?

On Thu, Apr 28, 2011 at 5:24 PM, David Ponzone <david.ponzone at ipeva.fr> wrote:
> Well, I thought I could start a thread about that.
> I am trying to accomplish this, and I guess I am not the only one.
> Lync 2010 seems to have quite some success (compared to OCS), so there are
> probably business opportunities around this.
> My first attempt is a half success, as I got calls from Lync to FreeSWITCH
> working (need some extensive testing, though), and calls from FreeSWITCH to
> Lync are connecting ok, but they get disconnected after circa 30 seconds.
> I am trying to pinpoint the reason for this disconnection, but untll now, I
> had no luck.
> RTCP requirement was disabled on the Lync side (RTCPActiveCalls), but anyway
> I have enabled RTCP on the FreeSWITCH, so it should not be that.
> RTP is flowing normally, it's not a call on hold or muted.
> Refer was disabled on the Lync side.
> SessionTimer is enabled on the Lync side (but I dont think I ever saw a
> REINVITE caused by the session timer).
> I just suddenly receive a BYE from Lync, after 30-35 seconds.
> On the Lync side, as you can guess, it's not easy to access any meaningful
> logs. I think our partner managing the Lync will have to escalate that to
> the SVP Product Engineering to get the right command to enable the
> interesting debug mode :)
> I've been told that some folks at MS were claiming a such trunking was not
> possible.
> Well, I would tend to say otherwise, as I am not far to get this working,
> except of course if they just hardcoded some forbidden Owner Usernames in
> the SDP, like FreeSWITCH, in order to save this business from the mean
> OpenSource world and leave it to commercial SBC vendors.
> I can hardly imagine they would dare to do that in 2011, so the question
> remains opened: what may be closing that call after 30 seconds ?
> I would be glad to discuss the subject, here or privately, with anyone who
> is involved on a such project, or planning to be soon.
> David Ponzone  Direction Technique
> email: david.ponzone at ipeva.fr
> tel:      01 74 03 18 97
> gsm:   06 66 98 76 34
> Service Client IPeva
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-- 
Kristian Kielhofner