hi i need to know how the transport send or recieve an RTP packet ?? can you help me in this link you can find the schema of this communication but i can't find the rtp_cb function please i need help. thank you , http://www.pjsip.org/pjmedia/docs/html/group__PJMEDIA__TRANSPORT.htm -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100826/789eb81d/attachment.html>