Not sure how todo this SIP capture. Can you give me an hand and explain how can I get this trace.<br><div class="gmail_quote">I can post my configuration if it&#39;s necesary. But I&#39;use the default NAT setup that comes with Debian package.<br>

<br><div class="gmail_quote">2011/1/19 Alex Balashov <span dir="ltr">&lt;<a href="mailto:abalashov@evaristesys.com" target="_blank">abalashov@evaristesys.com</a>&gt;</span><div><div></div><div class="h5"><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">

You&#39;d need to post the SIP capture, but it sounds like Kamailio is not associating the ACK with any known transaction, perhaps because the ACK has an unexpected RURI, Via branch parameter, or CSeq number.<br>
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