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    <tt>The problem is not the 5 seconds timeout at sip level, is the
      fact that the end point you are trying to connect to via TCP does
      not accept the connection. You can check that via tcpdump.<br>
      <br>
      Regards,<br>
    </tt>
    <pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
    <div class="moz-cite-prefix">On 02.02.2016 11:17, Nabeel wrote:<br>
    </div>
    <blockquote
cite="mid:CA+vx6K+iuy_3FBRJQ9VwNFBahr9-bJNC+r4Qw8_fOqzQ26FP8Q@mail.gmail.com"
      type="cite">
      <p dir="ltr">Hi Bogdan,</p>
      <p dir="ltr">Even if I remove the 5 second timeout by removing
        #modparam("tm", "fr_inv_timeout", 30), the timeout occurs after
        about 20 seconds. What do you suggest is the solution? </p>
      <div class="gmail_quot&lt;blockquote class=" style="margin:0 0 0
        .8ex;border-left:1px #ccc solid;padding-left:1ex">
        <div text="#000000" bgcolor="#FFFFFF"> <tt>Hi Nabeel,<br>
            <br>
            Your OpenSIPS tries to connect via TCP to the destination
            and to avoid blocking it is doing it async:<br>
            <br>
          </tt><br>
          <div>Feb  1 19:22:13 server1 opensips: Feb  1 19:22:13 [20587]
            DBG:core:print_ip: tcpconn_new: new tcp connection to:
            188.29.165.162</div>
          <div>Feb  1 19:22:13 server1 opensips: Feb  1 19:22:13 [20587]
            DBG:core:tcpconn_new: on port 58985, proto 2</div>
          Feb  1 19:22:13 server1 opensips: Feb  1 19:22:13 [20587]
          DBG:core:proto_tcp_send: Successfully started async connection<br>
          <br>
          After that, in 5 seconds, the final timer hits (as timeout for
          no reply), while the TCP connect still haven;t finished (so
          there is no actual packet sent out).<br>
          <br>
          Regards,<br>
          <pre cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a moz-do-not-send="true" href="http://www.opensips-solutions.com" target="_blank">http://www.opensips-solutions.com</a></pre>
          <div>On 01.02.2016 21:35, Nabeel wrote:<br>
          </div>
          <blockquote type="cite">
            <div dir="ltr">Hi Bogdan,
              <div><br>
              </div>
              <div>Below is the requested log for TCP call attempt. 
                User 1111 is trying to call user 2222 via OpenSIPS
                server <span>162.248.6.120</span> :</div>
              <div><br>
              </div>
              <div><a moz-do-not-send="true"
                  href="http://pastebin.com/UQ9mEemd" target="_blank">http://pastebin.com/UQ9mEemd</a><br>
              </div>
            </div>
            <div class="gmail_extra"><br>
              <div class="gmail_quote">On 1 February 2016 at 09:41,
                Bogdan-Andrei Iancu <span dir="ltr">&lt;<a
                    moz-do-not-send="true"
                    href="mailto:bogdan@opensips.org" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:bogdan@opensips.org">bogdan@opensips.org</a></a>&gt;</span>
                wrote:<br>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div text="#000000" bgcolor="#FFFFFF"> <tt>Hi,<br>
                      <br>
                      I strongly suggest to look into the opensips logs
                      and see what opensips try to do with the call.
                      Based on your saying (that you see a timeout), I
                      suspect your OpenSIPS tries to deliver the call
                      over TCP to a destination which does not listen on
                      TCP.<br>
                      If you do not know hoe to interpret the logs, run
                      opensips in debug=4 mode, upload the logs
                      corresponding the INVITE execution and provide the
                      link.<br>
                      <br>
                      Regards,<br>
                    </tt>
                    <pre cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a moz-do-not-send="true" href="http://www.opensips-solutions.com" target="_blank">http://www.opensips-solutions.com</a></pre>
                    <div>
                      <div>
                        <div>On 31.01.2016 16:28, Nabeel wrote:<br>
                        </div>
                      </div>
                    </div>
                    <blockquote type="cite">
                      <div>
                        <div>
                          <div dir="ltr">Without using alias=<a
                              moz-do-not-send="true"
                              href="http://domain.com" target="_blank">domain.com</a>,
                            TCP still does not work.  My initial request
                            for someone to test this using Linphone
                            remains. Please test and let me know if you
                            can call using TCP with OpenSIPS listening
                            on an IP address.</div>
                          <div class="gmail_extra"><br>
                            <div class="gmail_quote">On 31 January 2016
                              at 09:28, Nabeel <span dir="ltr">&lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:nabeelshikder@gmail.com"
                                  target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:nabeelshikder@gmail.com">nabeelshikder@gmail.com</a></a>&gt;</span>
                              wrote:<br>
                              <blockquote class="gmail_quote"
                                style="margin:0 0 0 .8ex;border-left:1px
                                #ccc solid;padding-left:1ex">
                                <div dir="ltr">On further testing, using
                                  the IP address instead of the domain
                                  name in the URI setting of Linphone
                                  works with TCP, so I think this might
                                  be to do with SRV/NAPTR records
                                  associated with the domain.</div>
                                <div>
                                  <div>
                                    <div class="gmail_extra"><br>
                                      <div class="gmail_quote">On 31
                                        January 2016 at 08:29, Nabeel <span
                                          dir="ltr">&lt;<a
                                            moz-do-not-send="true"
                                            href="mailto:nabeelshikder@gmail.com"
                                            target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:nabeelshikder@gmail.com">nabeelshikder@gmail.com</a></a>&gt;</span>
                                        wrote:<br>
                                        <blockquote class="gmail_quote"
                                          style="margin:0 0 0
                                          .8ex;border-left:1px #ccc
                                          solid;padding-left:1ex">
                                          <div dir="ltr"><span
                                              style="font-size:12.8px">Hello,</span>
                                            <div
                                              style="font-size:12.8px"><br>
                                            </div>
                                            <div
                                              style="font-size:12.8px">There

                                              seems to be a problem with
                                              calls over TCP using
                                              Linphone, and since
                                              Linphone is a popular open
                                              source application, I
                                              would like someone to
                                              please verify this
                                              problem. Calls work fine
                                              with Linphone over UDP,
                                              but after registering with
                                              TCP using the same
                                              credentials, calls do not
                                              connect at all and lead to
                                              a request timeout.  A
                                              request timeout does not
                                              say much about the cause,
                                              but in this case I suspect
                                              there is something wrong
                                              with TCP on the server
                                              side. I would like someone
                                              to please install Linphone
                                              on your phone and connect
                                              to your OpenSIPS server
                                              using UDP and TCP.  Please
                                              report here if the calls
                                              work over both transports.
                                               </div>
                                          </div>
                                        </blockquote>
                                      </div>
                                      <br>
                                    </div>
                                  </div>
                                </div>
                              </blockquote>
                            </div>
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                      <span>
                        <pre>_______________________________________________
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</pre>
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