local RTP port unreachable when using mjsip/jmf

Posted by brian_d on Stack Overflow See other posts from Stack Overflow or by brian_d
Published on 2010-04-20T20:19:04Z Indexed on 2010/04/20 20:23 UTC
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Hello, I create a sip session with mjsip to an external voip provider. Then I transmit a test wav file over rtp to the provider using RtpManager.

The program runs with no errors and I answer the sip call. However, no audio is transmitted. When I diagnose the network traffic with wireshark, I see a bunch of RTP traffic from my localhost (behind some kind of nat) to the voip provider and nothing back.

After a while I get the ICMP error "Destination unreachable (Port unreachable)" from the provider to my localhost.

The software linphone works using the same localhost and voip provider - though it is using a different sip stack.

Any suggestions?

Thanks

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