Hi Nang, Thanks for your reply. I don't think that the problem has anything to do with the codec, because i also tried to get a call when my client didn't support the G729 codec. the result was the same. maybe you can think of anything else? Regards, Maya -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100307/8e9880df/attachment.html>