That is correct there is no answer to the INVITE and it doesn&#39;t appear to even enter the main route of the OpenSIPS config.  I have xlogs set up in the opensips script and I never see the INVITE enter.  Here is another sip trace from the php-sip click to call program and for some reason this INVITE does go through the main route without issue.<br /><br />#<br />U 2012/07/23 11:49:04.398750 50.XX.XX.156:5060 -&gt; 99.XX.XX.161:5060<br />INVITE sip:9016XX6XX4@192.168.88.13:3072;line=996he62l SIP/2.0.<br />Record-Route: &lt;sip:50.XX.XX.156;lr;ftag=34533;vst=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA;did=38a.ff1a8d45&gt;.<br />Via: SIP/2.0/UDP 50.XX.XX.156;branch=z9hG4bK10f3.c6fade97.0.<br />Via: SIP/2.0/UDP 50.XX.XX.54:5065;received=50.XX.XX.54;rport=5065;branch=z9hG4bK185398.<br />From: &lt;sip:c2c@50.XX.XX.54&gt;;tag=34533.<br />To: &lt;sip:9016XX6XX4@irock.com&gt;.<br />Call-ID: 78ecbf1cd5542c12fe2293da14517b38@50.57.75.54.<br />CSeq: 20 INVITE.<br />Contact: &lt;sip:c2c@50.XX.XX.54:5065&gt;.<br />Content-Type: application/sdp.<br />Max-Forwards: 69.<br />User-Agent: PHP SIP.<br />Subject: click2call.<br />Content-Length: 225.<br />P-hint: outbound-&gt;inbound .<br />P-hint: Route[6]: mediaproxy .<br />.<br />v=0.<br />o=click2dial 0 0 IN IP4 50.57.75.54.<br />s=click2dial call.<br />c=IN IP4 173.XX.XX.111.<br />t=0 0.<br />m=audio 12790 RTP/AVP 0 8 18 3 4 97 98.<br />a=rtpmap:0 PCMU/8000.<br />a=rtpmap:18 G729/8000.<br />a=rtpmap:97 ilbc/8000.<br />a=rtpmap:98 speex/8000.<br /><br />#<br />U 2012/07/23 11:49:04.398750 99.XX.XX.161:5060 -&gt; 50.XX.XX.156:5060<br />SIP/2.0 100 Giving a try.<br />Via: SIP/2.0/UDP 50.XX.XX.156;branch=z9hG4bK10f3.c6fade97.0.<br />Via: SIP/2.0/UDP 50.XX.XX.54:5065;received=50.XX.XX.54;rport=5065;branch=z9hG4bK185398.<br />From: &lt;sip:c2c@50.XX.XX.54&gt;;tag=34533.<br />To: &lt;sip:9016Xx6xx4@irock.com&gt;.<br />Call-ID: 78ecbf1cd5542c12fe2293da14517b38@50.XX.xx.54.<br />CSeq: 20 INVITE.<br />Server: OpenSIPS (1.8.0-notls (x86_64/linux)).<br />Content-Length: 0.<br />.<br /><br /><br />So I am not sure why the first sip trace INVITE I sent isn&#39;t being processed but the one above is.  Very weird.<br /><br />I haven&#39;t tried to send it to another OpenSIPS server because I really don&#39;t have any other server to test with.<br /><br />On , Bogdan-Andrei Iancu &lt;bogdan@opensips.org&gt; wrote:<br />&gt; <br />&gt; <br />&gt;   <br />&gt;     <br />&gt;   <br />&gt;   <br />&gt;     Hi Duane,<br />&gt; <br />&gt;       <br />&gt; <br />&gt;       You mean there is no answer to that INVITE ? When you tried to<br />&gt;       send the INVITE to another opensips, have you noticed errors in<br />&gt;       the logs (like parsing errors)?<br />&gt; <br />&gt;       <br />&gt; <br />&gt;       Regards,<br />&gt; <br />&gt;     <br />&gt;     Bogdan-Andrei Iancu<br />&gt; OpenSIPS Founder and Developer<br />&gt; http://www.opensips-solutions.com<br />&gt;     <br />&gt; <br />&gt;     On 07/21/2012 07:45 AM, duane.larson@gmail.com wrote:<br />&gt;     Has anyone used the ctd.sh example that comes with<br />&gt;       Opensips in the &quot;example&quot; folder? I am trying to use it and the<br />&gt;       INVITE gets sent out but nothing happens. I even tried with<br />&gt;       sending the INVITE to an OpenSIPS server and the OpenSIPS server<br />&gt;       never even sees it enter the main route even though I see that the<br />&gt;       INVITE is making it to the server because an NGREP shows it making<br />&gt;       it. It doesn&#39;t make much sense. I even did a debug and don&#39;t see<br />&gt;       anything showing that OpenSIPS sees the INVITE.<br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       Here is the INVITE that is generated from ctd.sh<br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       U 2012/07/19 18:20:13.486847 50.XX.XX.156:5060 -&gt;<br />&gt;       99.XX.XX.161:5060<br />&gt;       <br />&gt; <br />&gt;       INVITE sip:9016XXXXX@192.168.88.13:3072;line=g2hfphrk SIP/2.0.<br />&gt;       <br />&gt; <br />&gt;       Via: SIP/2.0/UDP 50.57.54.156;branch=z9hG4bKaab1.6c7ffd84.0.<br />&gt;       <br />&gt; <br />&gt;       To: sip:9016XXXXX@irock.com.<br />&gt;       <br />&gt; <br />&gt;       From: ;tag=134274001013257.<br />&gt;       <br />&gt; <br />&gt;       CSeq: 1 INVITE.<br />&gt;       <br />&gt; <br />&gt;       Call-ID: 134274001013257.fifouacctd.<br />&gt;       <br />&gt; <br />&gt;       Content-Length: 155.<br />&gt;       <br />&gt; <br />&gt;       User-Agent: OpenSIPS (1.8.0-dev0-tls (x86_64/linux)).<br />&gt;       <br />&gt; <br />&gt;       Contact: .<br />&gt;       <br />&gt; <br />&gt;       Content-Type: application/sdp.<br />&gt;       <br />&gt; <br />&gt;       .<br />&gt;       <br />&gt; <br />&gt;       v=0.<br />&gt;       <br />&gt; <br />&gt;       o=click-to-dial 0 0 IN IP4 0.0.0.0.<br />&gt;       <br />&gt; <br />&gt;       s=session.<br />&gt;       <br />&gt; <br />&gt;       c=IN IP4 0.0.0.0.<br />&gt;       <br />&gt; <br />&gt;       b=CT:1000.<br />&gt;       <br />&gt; <br />&gt;       t=0 0.<br />&gt;       <br />&gt; <br />&gt;       m=audio 9 RTP/AVP 8 0.<br />&gt;       <br />&gt; <br />&gt;       a=rtpmap:8 PCMA/8000.<br />&gt;       <br />&gt; <br />&gt;       a=rtpmap:0 PCMU/8000.<br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       <br />&gt; <br />&gt;       Is anyone else out there using anything else to do Click to<br />&gt;       Dial????<br />&gt;       <br />&gt; <br />&gt; _______________________________________________<br />&gt; Users mailing list<br />&gt; Users@lists.opensips.org<br />&gt; http://lists.opensips.org/cgi-bin/mailman/listinfo/users<br />&gt; <br />&gt;     <br />&gt;   <br />&gt; <br />&gt; <br />&gt;