Thanks for your reply, Klaus.<br> <br> I tried to force a priority on ACK messages, putting in begining's script file the 'relay control'. But it didnt work. The INVITE is forward first. <br> If somebody knows how to do that, please, let us know.<br> <br> Thanks<br> <br> Bruno Machado<br> <br> <br> <br><br><b><i>Klaus Darilion &lt;klaus.mailinglists@pernau.at&gt;</i></b> escreveu:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> Bruno Machado wrote:<br>&gt; Hi all<br>&gt; <br>&gt; Im in trouble with this problem: I have a Openser the connect to a <br>&gt; carrier. I need that this proxy answer the messages in order that it <br>&gt; receive. In my situation, other device one hope behind it, sends an ACK <br>&gt; and, miliseconds after, it sends an INVITE to change the session. The <br>&gt; server where the Openser is installed receive the ACK first than INVITE, <br>&gt; but it ALWAYS forward this INVITE first.
 This way, I cant connect my <br>&gt; proxy to the carrier. I need to know how I can change this behavior: the <br>&gt; SIP proxy needs to send the ACK first. First in, first out..... Anybody <br>&gt; knows how to do it?<br><br>Hi!<br><br>The client which receives the reINVITE before the ACK should be smart <br>enough to accept the reINVITE (which is also an implicit ACK), and then <br>ignore the late coming ACK.<br><br>btw: I've also seen this phenomenon recently when testing with SIPP. The <br>basic scenario sends INVITE-ACK-BYE. The BYE is sent immediately after <br>the ACK. In openser, the BYE overtakes the ACK - everytime. Is there <br>some special processing for ACK which takes more time the for other in <br>dialog requests?<br><br><br>regards<br>Klaus<br></blockquote><br><p>
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