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    To:
<a class="moz-txt-link-rfc2396E" href="sip:8009499014@X.YYY.32.10:5060">&lt;sip:8009499014@X.YYY.32.10:5060&gt;</a>;tag=ac86f72d2bfe10395b2e62e01c70bf66.0f65<br>
    <br>
    In your call sample To has a tag. <br>
    if this is the first Invite it can't have a tag at the end,
    otherwise Asterisk will look for an existing dialog in its database
    and will show an error, if can't find any.<br>
    <br>
    It looks like the other end is never closing the previous dialog?..
    is Asterisk sending a proper 200 OK after receiving a BYE?<br>
    NAT problem?<br>
    <br>
    regards,<br>
    <pre class="moz-signature" cols="72">-- 
==================================
Miguel Oyarzo
DevOps Engineer
<a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/mikeaustralia">http://www.linkedin.com/in/mikeaustralia</a>
Linux User: # 483188 - counter.li.org 
Melbourne, Australia

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    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 9/17/2013 6:18 AM, Vik Killa wrote:<br>
    </div>
    <blockquote
cite="mid:CAC-LwPNRCHrbtef4cDkxmRWdyf_HFWuXY5smVritnAsj0ar3WQ@mail.gmail.com"
      type="cite">
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      <div dir="ltr">Asterisk is sending a 481 in response to an INVITE
        for reasons I do not understand. Here is the INVITE:<br>
        <br>
        <br>
        <div>
          <div>INVITE <a class="moz-txt-link-freetext" href="sip:8009499014@X.YYY.32.3:5060;transport=udp">sip:8009499014@X.YYY.32.3:5060;transport=udp</a>
            SIP/2.0</div>
          <div>Record-Route: <a class="moz-txt-link-rfc2396E" href="sip:X.YYY.32.10;lr=on;ftag=247898">&lt;sip:X.YYY.32.10;lr=on;ftag=247898&gt;</a></div>
          <div>To:
<a class="moz-txt-link-rfc2396E" href="sip:8009499014@X.YYY.32.10:5060">&lt;sip:8009499014@X.YYY.32.10:5060&gt;</a>;tag=ac86f72d2bfe10395b2e62e01c70bf66.0f65</div>
          <div>From: "Scott Thompson"
            <a class="moz-txt-link-rfc2396E" href="sip:7166359474@X.YYY.32.10">&lt;sip:7166359474@X.YYY.32.10&gt;</a>;tag=247898</div>
          <div>Via: SIP/2.0/UDP
            X.YYY.32.10;branch=z9hG4bK542e.5042d534.0</div>
          <div>Via: SIP/2.0/UDP
X.YYY.33.178:5060;rport=5060;received=X.YYY.33.178;branch=z9hG4bK57b720cccb00f8498662f48e8</div>
          <div>Call-ID: <a moz-do-not-send="true"
              href="mailto:94f80f866e877490729548a079abe371@192.168.101.5">94f80f866e877490729548a079abe371@192.168.101.5</a></div>
          <div>CSeq: 2 INVITE</div>
          <div>Contact: <a class="moz-txt-link-rfc2396E" href="sip:7166359474@X.YYY.33.178:5060">&lt;sip:7166359474@X.YYY.33.178:5060&gt;</a></div>
          <div>Max-Forwards: 69</div>
          <div>x-inin-crn: 2001471530;loc=Amherst;ms=STAMPEDE-MS</div>
          <div>Supported: join, replaces</div>
          <div>User-Agent: ININ-TsServer/3.13.11.12748</div>
          <div>Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS,
            PRACK, REFER, SUBSCRIBE</div>
          <div>Accept: application/sdp</div>
          <div>Accept-Encoding: identity</div>
          <div>Content-Type: application/sdp</div>
          <div>Content-Length: 252</div>
          <div>Proxy-Authorization: Digest
username="909003660716",realm="X.YYY.32.10",nonce="5237559000011a22ed0fae66765d46ef9131e311fbb9d2fb",uri=<a class="moz-txt-link-rfc2396E" href="sip:8009499014@X.YYY.32.10:5060">"sip:8009499014@X.YYY.32.10:5060"</a>,response="cb6306569b3047ac35064dcb5aee6db4"</div>
          <div>X-Enswitch-RURI: <a class="moz-txt-link-freetext" href="sip:8009499014@X.YYY.32.10:5060">sip:8009499014@X.YYY.32.10:5060</a></div>
          <div>X-Enswitch-Source: X.YYY.33.178:5060</div>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div>The only problem I see with this INVITE is the VIAs are not
          right after the INVITE line... although in <a
            moz-do-not-send="true"
            href="https://www.ietf.org/rfc/rfc3261.txt">https://www.ietf.org/rfc/rfc3261.txt</a>,
          it explicitly states the the order of the headers is not a
          requirement, it seems Asterisk does make it one...&nbsp;</div>
        <div><br>
        </div>
        <div>"The relative order of header fields with different field
          names is not</div>
        <div>&nbsp; &nbsp;significant. &nbsp;However, it is RECOMMENDED that header
          fields which are</div>
        <div>&nbsp; &nbsp;needed for proxy processing (Via, Route, Record-Route,
          Proxy-Require,</div>
        <div>&nbsp; &nbsp;Max-Forwards, and Proxy-Authorization, for example)
          appear towards</div>
        <div>&nbsp; &nbsp;the top of the message to facilitate rapid parsing. &nbsp;The
          relative</div>
        <div>&nbsp; &nbsp;order of header field rows with the same field name is
          important."</div>
      </div>
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      <pre wrap="">--
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