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    <p>To be sure I understand properly: do they require to send a
      CANCEL back to them for calls that they initiate with the first
      INVITE and do not get 200ok, but 3xx/4xx/5xx?</p>
    <p>Cheers,<br>
      Daniel<br>
    </p>
    <div class="moz-cite-prefix">On 08.04.19 17:34, Sergiu Pojoga wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAJZsGCnB2foJ-Hm0_RT6=bXNmUdWpEefwwHOhfZAK=4+pM7f5A@mail.gmail.com">
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      <div dir="ltr">
        <div dir="ltr">Looks like it's going to be another battle with a
          Metaswitch-based carrier... so far they are telling me 'we
          can't do anything about it. Send us a CANCEL to tear down the
          call`
          <div><br>
          </div>
          <div>I know this is a `another story` question, but if I had
            to overcome this, would <b>uac_req_send() </b>be my only
            option?</div>
          <div><br>
          </div>
          <div>Thanks again,</div>
          <div>--Sergiu</div>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Mon, Apr 8, 2019 at 2:15 AM
          Daniel-Constantin Mierla <<a
            href="mailto:miconda@gmail.com" moz-do-not-send="true">miconda@gmail.com</a>>
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div bgcolor="#FFFFFF">
            <p><br>
            </p>
            <div class="gmail-m_-8614156434403695944moz-cite-prefix">On
              07.04.19 15:40, Sergiu Pojoga wrote:<br>
            </div>
            <blockquote type="cite">
              <div dir="ltr">
                <div dir="ltr">
                  <div dir="ltr">
                    <div dir="ltr">To simplify, the problem seems to
                      come down to the following: how do you cancel/end
                      an early state dialog between the caller and
                      callee after `fr_inv_timeout` occurs? Kam
                      self-generates a proper CANCEL towards the callee,
                      while the caller gets a `408 Request Timeout' with
                      a different To-tag.</div>
                  </div>
                </div>
              </div>
            </blockquote>
            <p>That's all required not to have a dialog completed, but
              faild. There is no need to send a BYE or another CANCEL.
              The INVITE got the 408, not 200.</p>
            <p>Cheers,<br>
              Daniel<br>
            </p>
            <blockquote type="cite">
              <div dir="ltr">
                <div dir="ltr">
                  <div dir="ltr">
                    <div dir="ltr">
                      <div><br>
                      </div>
                      <div>I've tried:</div>
                      <div>dlg_bye("all") - throws an error,
                        non-confirmed dialogs can't be terminated with
                        this function<br>
                      </div>
                      <div>t_cancel_callid("$dlg(callid)",
                        "$dlg(from_cseq)", "22", "200") - doesn't seem
                        to produce any action<br>
                      </div>
                      <div><br>
                      </div>
                      <div>Suggestions?</div>
                    </div>
                  </div>
                </div>
              </div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr" class="gmail_attr">On Sat, Apr 6, 2019 at
                  11:25 AM Sergiu Pojoga <<a
                    href="mailto:pojogas@gmail.com" target="_blank"
                    moz-do-not-send="true">pojogas@gmail.com</a>>
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0px 0px
                  0px 0.8ex;border-left:1px solid
                  rgb(204,204,204);padding-left:1ex">
                  <div dir="ltr">
                    <div dir="ltr">Hi ppl,<br>
                      <div><br>
                      </div>
                      <div>Scenario: invite from upstream is t_relayed
                        to a client gateway. After `fr_inv_timeout`
                        occurs, in a failure route I simply t_reply with
                        "503 - Service unavailable", then exit(). </div>
                      <div><br>
                      </div>
                      <div>However, the upstream provider simply ignores
                        this reply, call doesn't hang up. This doesn't
                        happen when the client's gateway generates
                        identical 503 or other negative replies.</div>
                      <div><br>
                      </div>
                      <div>I suspect this is happening because the
                        To-tag in the Kam generated 503 reply doesn't
                        match with the To-tag that previously was
                        forwarded from the client's gateway to the
                        upstream provider in the `180 Ringing`.</div>
                      <div><br>
                      </div>
                      <div>Any suggestions what can be done about it?</div>
                      <div><br>
                      </div>
                      <div><br>
                      </div>
                      <div>
                        <div>2019/04/06 10:42:46.127177
                          65.39.xxx.xxx:5060 -> 208.72.xxx.xxx:5060 
                                                                       
                                                                       
                                                                       
                                         </div>
                        <div>SIP/2.0 180 Ringing                       
                                                                       
                                                                       
                                                                       
                                                                       
                                   </div>
                        <div>Via: SIP/2.0/UDP
208.72.xxx.xxx:5060;received=208.72.xxx.xxx;rport=5060;branch=z9hG4bK1982422573 
                                                                       
                                                                       
                                    </div>
                        <div>Record-Route: <a
                            class="gmail-m_-8614156434403695944moz-txt-link-rfc2396E"
                            moz-do-not-send="true"><sip:65.39.xxx.xxx;lr=on;did=915.8af1></a> 
                                                                       
                                                                       
                                                                       
                                                                      </div>
                        <div>From: "SERGIU" <a
                            class="gmail-m_-8614156434403695944moz-txt-link-rfc2396E"
                            moz-do-not-send="true"><sip:514XXXXXXX@208.72.xxx.xxx></a>;isup-oli=00;tag=1975755942 
                                                                       
                                                                       
                                                          </div>
                        <div>To: <a
                            class="gmail-m_-8614156434403695944moz-txt-link-rfc2396E"
                            moz-do-not-send="true"><sip:514XXXXXXX@65.39.xxx.xxx></a>;tag=<font
                            color="#ff0000">as2ab54180 </font>          
                                                                       
                                                                       
                                                                       
                                                          </div>
                        <div>Call-ID: <a
                            class="gmail-m_-8614156434403695944moz-txt-link-abbreviated"
                            href="mailto:DID-28270826@208.72.xxx.xx"
                            target="_blank" moz-do-not-send="true">DID-28270826@208.72.xxx.xx</a> 
                                                                       
                                                                       
                                                                       
                                                                       
                                         </div>
                        <div>CSeq: 477023 INVITE                       
                                                                       
                                                                       
                                                                       
                                                                       
                                   </div>
                        <div>Supported: replaces, timer, path           
                                                                       
                                                                       
                                                                       
                                                                       
                                  </div>
                        <div>Contact: <a
                            class="gmail-m_-8614156434403695944moz-txt-link-rfc2396E"
                            moz-do-not-send="true"><sip:1514XXXXXXX@65.39.xxx.xxx:5060></a> 
                                                                       
                                                                       
                                                                       
                                                                       
                               </div>
                        <div>Content-Length: 0                         
                                                                       
                                                                       
                                                                       
                                                                       
                                   </div>
                        <div>                                           
                                                                       
                                                                       
                                                                       
                                                                       
                                  </div>
                        <div>                                           
                                                                       
                                                                       
                                                                       
                                                                       
                                </div>
                        <div>2019/04/06 10:42:51.072516
                          65.39.xxx.xxx:5060 -> 208.72.xxx.xxx:5060 
                                                                       
                                                                       
                                                                       
                                          </div>
                        <div>SIP/2.0 503 Service Unavailable           
                                                                       
                                                                       
                                                                       
                                                                       
                                   </div>
                        <div>Call-ID: <a
                            class="gmail-m_-8614156434403695944moz-txt-link-abbreviated"
                            href="mailto:DID-28270826@208.72.xxx.xx"
                            target="_blank" moz-do-not-send="true">DID-28270826@208.72.xxx.xx</a> 
                                                                       
                                                                       
                                                                       
                                                                       
                                         </div>
                        <div>Via: SIP/2.0/UDP
208.72.xxx.xxx:5060;rport=5060;branch=z9hG4bK1982422573;received=208.72.xxx.xxx 
                                                                       
                                                                       
                                    </div>
                        <div>From: "SERGIU" <a
                            class="gmail-m_-8614156434403695944moz-txt-link-rfc2396E"
                            moz-do-not-send="true"><sip:514XXXXXXX@208.72.xxx.xxx></a>;isup-oli=00;tag=1975755942 
                                                                       
                                                                       
                                                          </div>
                        <div>To: <a
                            class="gmail-m_-8614156434403695944moz-txt-link-rfc2396E"
                            moz-do-not-send="true"><sip:514XXXXXXX@65.39.xxx.xxx></a>;tag=<font
                            color="#ff0000">a6a1c5f60faecf035a1ae5b6e96e979a-8e82</font> 
                                                                       
                                                                       
                                                              </div>
                        <div>CSeq: 477023 INVITE                       
                                                                       
                                                                       
                                                                       
                                                                       
                                   </div>
                        <div>Server: KAM                               
                                                                       
                                                                       
                                                                       
                                                                       
                                   </div>
                        <div>Content-Length: 0 </div>
                      </div>
                      <div><br>
                      </div>
                      <div>Thanks,</div>
                      <div>--Sergiu</div>
                    </div>
                  </div>
                </blockquote>
              </div>
              <br>
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              <pre class="gmail-m_-8614156434403695944moz-quote-pre">_______________________________________________
Kamailio (SER) - Users Mailing List
<a class="gmail-m_-8614156434403695944moz-txt-link-abbreviated" href="mailto:sr-users@lists.kamailio.org" target="_blank" moz-do-not-send="true">sr-users@lists.kamailio.org</a>
<a class="gmail-m_-8614156434403695944moz-txt-link-freetext" href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users" target="_blank" moz-do-not-send="true">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a>
</pre>
            </blockquote>
            <pre class="gmail-m_-8614156434403695944moz-signature" cols="72">-- 
Daniel-Constantin Mierla -- <a class="gmail-m_-8614156434403695944moz-txt-link-abbreviated" href="http://www.asipto.com" target="_blank" moz-do-not-send="true">www.asipto.com</a>
<a class="gmail-m_-8614156434403695944moz-txt-link-abbreviated" href="http://www.twitter.com/miconda" target="_blank" moz-do-not-send="true">www.twitter.com/miconda</a> -- <a class="gmail-m_-8614156434403695944moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda" target="_blank" moz-do-not-send="true">www.linkedin.com/in/miconda</a>
Kamailio World Conference - May 6-8, 2019 -- <a class="gmail-m_-8614156434403695944moz-txt-link-abbreviated" href="http://www.kamailioworld.com" target="_blank" moz-do-not-send="true">www.kamailioworld.com</a></pre>
          </div>
        </blockquote>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
Kamailio (SER) - Users Mailing List
<a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.kamailio.org">sr-users@lists.kamailio.org</a>
<a class="moz-txt-link-freetext" href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a>
</pre>
    </blockquote>
    <pre class="moz-signature" cols="72">-- 
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Kamailio World Conference - May 6-8, 2019 -- <a class="moz-txt-link-abbreviated" href="http://www.kamailioworld.com">www.kamailioworld.com</a></pre>
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