<html>
  <head>

    <meta http-equiv="content-type" content="text/html; charset=utf-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    Hi all, I have a special case, a user with a Cisco system. He uses
    the standard 5060 port but uses NAT. Everything is correct until
    send the ACK signaling and the port changes. Any ideas?
    <div class="moz-forward-container">
      <p><img style="-webkit-user-select: none;background-position: 0px
          0px, 10px 10px;background-size: 20px
          20px;background-image:linear-gradient(45deg, #eee 25%,
          transparent 25%, transparent 75%, #eee 75%, #eee
          100%),linear-gradient(45deg, #eee 25%, white 25%, white 75%,
          #eee 75%, #eee 100%);" src="http://i.imgur.com/RsEkczIl.png"
          moz-do-not-send="true"></p>
      <pre class="moz-signature" cols="72">external cfg:
&lt;settings&gt;
        &lt;param name='dialplan' value='XML'/&gt;
        &lt;param name='user-agent-string' value='NP000'/&gt;
        &lt;param name='username' value='NP000' /&gt;
        &lt;param name='ext-sip-ip' value='auto'/&gt;
        &lt;param name='ext-rtp-ip' value='auto'/&gt;
        &lt;param name='rtp-ip' value='auto'/&gt;
        &lt;param name='sip-ip' value='auto'/&gt;
        &lt;param name='sip-port' value='5060'/&gt;
        &lt;param name='nonce-ttl' value='60'/&gt;
        &lt;param name='rtp-timeout-sec' value='300'/&gt;
        &lt;param name='rtp-hold-timeout-sec' value='1800'/&gt;
        &lt;param name='rtp-timer-name' value='soft'/&gt;
        &lt;param name='aggressive-nat-detection' value='True'/&gt;
        &lt;param name='NDLB-received-in-nat-reg-contact' value='False'/&gt;

        &lt;param name='NDLB-broken-auth-hash' value='False'/&gt;
        &lt;param name='enable-timer' value='True'/&gt;
        &lt;param name='session-timeout' value='1800'/&gt;
        &lt;param name='apply-nat-acl' value='rfc1918'/&gt;
        &lt;param name='inbound-codec-prefs' value='PCMA,PCMU,G729'/&gt;
        &lt;param name='outbound-codec-prefs' value='PCMA,PCMU,G729'/&gt;
        &lt;param name='inbound-codec-negotiation' value='greedy'/&gt;
        &lt;param name='disable-transcoding' value='True'/&gt;
        &lt;param name='debug' value='0'/&gt;
        &lt;param name='rfc2833-pt' value='101'/&gt;
        &lt;param name='dtmf-duration' value='100'/&gt;
        &lt;param name='disable-register' value='False'/&gt;
        &lt;param name='challenge-realm' value='auto_from'/&gt;
        &lt;param name='auth-calls' value='True'/&gt;
        &lt;param name='log-auth-failures' value='True'/&gt;
        &lt;param name='context' value='public'/&gt;
        &lt;param name='apply-inbound-acl' value='domains'/&gt;
        &lt;!--&lt;param name='inbound-late-negotiation' value='true'/&gt;--&gt;

        &lt;param name="pass-rfc2833" value="true"/&gt;
        &lt;param name='pass-callee-id' value='true'/&gt;
        &lt;param name='manage-presence' value='false'/&gt;
      &lt;/settings&gt;

-- 
[Joaquin Peral Cascales]
Departamento de Telefonía
911090048</pre>
    </div>
  </body>
</html>