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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Anybody give some hints on this?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thierry Luo<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> sr-users-bounces@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] <b>On Behalf Of </b>Thierry Luo<br><b>Sent:</b> Saturday, December 19, 2015 00:40<br><b>To:</b> sr-users@lists.sip-router.org<br><b>Subject:</b> [SR-Users] Issue with end to end MESSAGE over TCP<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi All,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I have deployed a Kamailio proxy server (as IMS pCSCF) in Amazon EC2. UA registration over TCP and presence flow (PUBLISH/NOTIFY) are all fine. But MESSAGE from one UA to another is UA over TCP is always not successful. I captured the sip flow from the server, and found that at the final hop from Proxy to terminating UA, the Kamailio server send the MESSAGE over udp, regardless of the fact that UAs were registered over TCP. <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>What is the problem maybe? Attached is the cfg file.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thanks.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thierry Luo<o:p></o:p></p><div style='border:solid #C5D2DA 1.0pt;padding:9.0pt 9.0pt 9.0pt 9.0pt'><div><p class=MsoNormal style='line-height:160%;background:#F6F9FC'><b><span style='font-size:9.0pt;line-height:160%;font-family:"Verdana",sans-serif;color:green'>1</span></b><span style='font-size:9.0pt;line-height:160%;font-family:"Verdana",sans-serif;color:#A0A0A0'> attachments<o:p></o:p></span></p></div><p class=MsoNormal style='margin-top:6.0pt;line-height:160%;background:#F6F9FC'><b><span style='font-size:9.0pt;line-height:160%;font-family:"Verdana",sans-serif;color:#333333'>kamailio_PCSCF.CFG</span></b><span style='font-size:9.0pt;line-height:160%;font-family:"Verdana",sans-serif;color:#999999'>(32K)</span><b><span style='font-size:9.0pt;line-height:160%;font-family:"Verdana",sans-serif;color:#333333'><o:p></o:p></span></b></p><p class=MsoNormal style='margin-left:.5in;line-height:160%;background:#F6F9FC'><span style='font-size:9.0pt;line-height:160%;font-family:"Verdana",sans-serif'><a href="http://preview.mail.yeah.net/xdownload?filename=kamailio_PCSCF.CFG&mid=1tbiGBDUBFXMT2MZdgAAsC&part=3&sign=d105295c466d0caec2b571c5b0fb0f61&time=1450517114&uid=langsir%40yeah.net" target="_blank"><span style='color:#0669B2'>download</span></a> <o:p></o:p></span></p></div></div></body></html>