<html>
<head>
<style>
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
FONT-SIZE: 10pt;
FONT-FAMILY:Tahoma
}
</style>
</head>
<body class='hmmessage'>
<style>.hmmessage P{margin:0px;padding:0px}body.hmmessage{FONT-SIZE: 10pt;FONT-FAMILY:Tahoma}</style>Hi,<br><br>I am using openSER as a proxy for a simple SIP call (UAC <--> openSER <--> UAS). openSER receives ACK from callee but doesn't send it to caller.<br>It seems openSER can not find a matching transaction, so it ignore and discard the message.<br><br> if ( is_method("ACK") )<br> {<br> if ( t_check_trans() )<br> {<br> t_relay();<br> exit;<br> }<br> else<br> {<br><span style="color: rgb(0, 0, 255);"> # ACK without matching transaction ... ignore and discard.\n");</span><br style="color: rgb(0, 0, 255);"><span style="color: rgb(0, 0, 255);"> exit;</span><br> }<br><br>Here is the message header:<br><br>Internet Protocol, Src: 10.0.0.174 (10.0.0.174), Dst: 10.0.0.160 (10.0.0.160)<br>...<br>ACK sip:9134750000@10.0.0.183:5080 SIP/2.0<br>Via: SIP/2.0/UDP 10.0.0.174:5040;branch=z9hG4bK-12255-1-4<br>From: <sip:9133750000@10.0.0.174:5040>;tag=1<br>To: <sip:9134750000@10.0.0.183:5080>;tag=1<br>Call-ID: 1-12255@10.0.0.174<br>CSeq: 1 ACK<br>Contact: sip:sipp@10.0.0.174:5040<br>Max-Forwards: 70<br>Subject: Performance Test<br>Content-Length: 0<br><br><br>Am I missing anything?<br><br>Thanks,<br>Alex<br><br><br /><hr />Want to do more with Windows Live? Learn “10 hidden secrets” from Jamie. <a href='http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008' target='_new'>Learn Now</a></body>
</html>