Hi Javier

Yes we are, but the problem only happens in %6-%8 of the calls. It happens in calls that have identical signaling to the ones that don't have the problem.

I have been speaking with Richard Fuchs at sip wise and I am going to try adding the trust address flag to sip wise and see if it helps. That hopefully will make it take the address in the c= attribute more readily.

I will update this thread once we push that live.

If any one has another suggestions though I am very open to hearing them :).

Thanks very much.

All the best.

Will Ferrer

Switchsoft Inc

On Thu, Nov 20, 2014 at 9:29 AM, Javier Ricke <javierr.vv@gmail.com> wrote:

u job behind nat?

2014-11-19 3:13 GMT-03:00 Will Ferrer <will.ferrer@switchsoft.com>:

Hi All

We are experiencing an odd problem with 1 way audio in about %6-%8 of our calls.

It seems to me that what is happening is that our kamailio installation (using rtpengine) is some times ignoring the c= attribute that the carrier is sending us, and sending our audio instead to either address in the carriers o= attribute, or just to the same address we sent our sip invite too.

We have looked at hundreds of calls and haven't found a reliable pattern why this happens some times and not others. It really happens in a lot of different scenarios with lots of different carriers and differently formatted SDP packets.

I was wondering if any one had an idea where to start for a solution, or a way to make rtpengine always send audio to the ip in the c= attribute we are receiving from the carrier.

I haven't been able to find anything so far.

Thank you much for any assistance.

All the best.

Will

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