Hi,all I'm new to PJSIP, I'd like to learn the TCP Hole punching mechanism in PJSIP. After roughly reading the source code these days, I just found that simple TCP connect function is used while NAT TRAVERSE. Can the three-way handshake protocol succeed? Or I?m wrong? Is there any articles talking about Hole punching or NAT Traverse mechanism with TCP in PJSIP? Really need help. Regards, NingQue -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140811/bcaed092/attachment.html>