Hi, When registering, I received this error. The problem is there are 2 port in Contact header (sip:voip01 at 192.168.1.2:58846:19048;ob) !!!!! sip_transport. !Error processing 581 bytes packet from UDP 130.28.21.220:5060 : PJSIP syntax error exception when parsing 'Contact' header on line 7 col 42: SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.1.2:58846 ;rport=19272;branch=z9hG4bKPjTNet-Y.xbTs.7lNHOAYkGY2QwB8I-hJS From: <sip:voip01@xxxxxxxxxxxx>;tag=jS19MIvASpAuJOuugmxf1iU4uFKcmgeJ To: <sip:voip01 at mydomain.com>;tag=59321ededf88236b7d7d0212a7fcc573.2b8e Call-ID: Oa3G73aE6VSm2u3Fyk4c11sxgrbg8Ztz CSeq: 26123 REGISTER Contact: <sip:voip01 at 192.168.1.2:58846:19048;ob>;expires=453, <sip:voip01 at 124.21.192.210:19211;ob>;expires=831, <sip:voip01 at 124.21.192.210:19264 ;ob>;expires=850<sip:voip01 at 124.21.192.210:19272;ob>;expires=881 -- end of packet. Please help -- Khoa Pham HCMC University of Science Faculty of Information Technology -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130219/6fb0628d/attachment-0001.html>