One way audio

FreePBX Endpoints
1

I have a pjsip trunk between freepbx and adtran.

Adtran is behind nat with a private ip address that is not on freepbx local ip address

And trunk is up between freepbx and adtran , pinted to the public ip address of Adtran

Rewrite Contact and RTP Symmetric and Force rport are set to yes

But , rtp is going to the private ip address of adtran. connection and sip signaling are fine, I see too ok , and ACK

200ok/SDP has the following informaito :slight_smile:

  • IN IP4 X.X.X.X ( public ip address of Adtran )
  • c IN IP4 y.y.y.y ( Private ip address )

I have RTP symmetric yes. Why its sending back rtp to the private ip address now?

2

Asterisk has to receive RTP from the remote side before it can latch on to the source and change to sending media to it. Is Asterisk getting RTP?

3

The RTP is going from asterisk to the adtran, we are using this to page via adtran to the paging speaker that is connected to adtran fxs port. I see RTP is going out from asterisk on the second leg of the call ( call from asterisk to adtran ) but to the wrong ip .

So you means its because we don’t receive any rtp from adtran side?

4

Yes, if Asterisk does not receive RTP it can’t know the real IP address and port to send it to.