Hi I have a SIP server in the Internet running on a public IP. I connect 2 PJSIP-clients (A and B) which are behind NAT. When I call from A to B then B hears A but A does not hear B. When I call from B to A the A hears B but B does not hear A. These means the caller always does not hear the incoming audio. But if it is called the audio comes in. But when I call a SNOM phone which is connected same then I receive the audio from SNOM. Any idea? Regards Michael -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111103/ff4cd495/attachment.html>