HI Wizards, I am still unresolved in my problem. I want to ask that do PJSIP while registering uses the STUN or other NAT algo. I am in a region where the port 5060 is blocked and I am behind a NAT. What I do that I append the port 6000 in the SIP IP while registering. I get Registered in the eyebeam and other softphone, But I am failing in the PJSIP. Please is there any way around. Regards: Ravi -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100131/2bf89acb/attachment.html>