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    Hi Tung,<br>
    <br>
    The ACK is probably malformed.<br>
    Please send 200 OK and ACK packets<br>
    <br>
    The Contact: header in the 200 OK and the URI in the ACK must match.<br>
    <br>
    Regards<br>
    <br>
    John<br>
    <br>
    <div class="moz-cite-prefix">On 24/09/2015 19:36, Tung Tran wrote:<br>
    </div>
    <blockquote
cite="mid:CALOuXu=JishO6-WDTzWX937abc2QREbUcFC8krwnvs-FA9v0bA@mail.gmail.com"
      type="cite">
      <div dir="ltr">Dear all
        <div><br>
        </div>
        <div>I have this scenario:</div>
        <div>Caller from PSTN (via Cisco gateway 5400) dialed DID number
          which was assigned to an ATA ( grand stream HT701). Call was
          hit SPCE just fine and connected but no audio from both sides,
          and call was disconnect after 30 seconds</div>
        <div> I ran wireshark on SPCE and saw SPCE didnt forward ACK
          message from Cisco gateway to client (HT701), so I guest HT701
          was waiting for ACK before starting RTP session, and it
          dropped call after timeout<br clear="all">
          <div>
            <div dir="ltr"><br>
            </div>
            <div dir="ltr">Please see the call flow for detail </div>
            <div dir="ltr"><br>
            </div>
            <div dir="ltr"><img
                src="cid:part1.01010703.07040205@skyracktelecom.com"
                alt="Inline image 1" height="446" width="327"><br>
              <div><br>
              </div>
              <div>Anyone got that issue before please share how to fix
                it?</div>
              <div><br>
              </div>
              <div><br>
              </div>
              <div>---</div>
              <div>Best regards,</div>
              <div><br>
              </div>
              <div><b>Tung Tran</b></div>
              <div><br>
              </div>
              <div>
                <div><font color="#0000ff"><b>V247 Enterprise Corp<br>
                    </b><a moz-do-not-send="true"
                      href="tel:713.358.2257" value="+17133582257"
                      target="_blank">713.358.2257</a> office   |  <a
                      moz-do-not-send="true" href="tel:281.857.3448"
                      value="+12818573448" target="_blank">281.857.3448</a>
                    cell<br>
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                    77036<br>
                  </font></div>
                <div><b><font color="#0000ff"><a class="moz-txt-link-abbreviated" href="mailto:tung.tran@V247.com">tung.tran@V247.com</a> | <a
                        moz-do-not-send="true"
                        href="http://www.v247.com/" target="_blank"><a class="moz-txt-link-abbreviated" href="http://www.V247.com">www.V247.com</a></a></font></b></div>
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              <div><br>
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      <br>
      <pre wrap="">_______________________________________________
Spce-user mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Spce-user@lists.sipwise.com">Spce-user@lists.sipwise.com</a>
<a class="moz-txt-link-freetext" href="https://lists.sipwise.com/listinfo/spce-user">https://lists.sipwise.com/listinfo/spce-user</a>
</pre>
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