Hi benny, I tested the pjmedia without stun , it worked fine but when i bind to addresses retured by stun (remote port= 32445 and local port=1021) I don't receive the RTP Packet, is there a limitation on the ports for wince or the problem is mainly NAT, I could not create the channel it returned -1 for the local port ? Thanks Regards, Anass Kartit -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090317/20b1606c/attachment.html>