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    <tt>Hi Tim,<br>
      <br>
      That ACK is an hop-by-hop ACK (ACK to a negative reply) and it
      should be absorbed (with timer cancellation) by TM module when
      hitting any TM function (t_newtran, t_check_trans, t_relay, etc).
      Usually you do this in the main route (the request route) (has
      nothing to do with the failure route) - check the default cfg
      script to see how those ACKs are handled : follow the path in the
      script : has_totag() =&gt; no loose_route() =&gt; ACK =&gt;
      t_check_trans()<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>
    <br>
    On 07/24/2012 09:30 PM, Tim Burke wrote:
    <blockquote
cite="mid:CAHUU36sAOTA5xP4MDrMgiJihmsUboqc1UPAAMwOJ=3Zi-eBwAQ@mail.gmail.com"
      type="cite">Thanks Bogdan,
      <div>I'll grab some logs but in the meantime I was able to have
        opensips detect the ACK by adding a call to t_relay() at the
        bottom of my route() function. &nbsp;From that it seems like I have
        to send the ACK to the tm module so that tm can clear the timers
        where it's waiting for ACK in response to 500 being sent. &nbsp;</div>
      <div><br>
      </div>
      <div>I understand the conversion of the 503 to 500 but I didn't
        understand why osips doesn't process the ACK in order to clear
        the "waiting for ACK" timers.<br>
        <br>
        <div class="gmail_quote">
          On Mon, Jul 23, 2012 at 4:26 AM, Bogdan-Andrei Iancu <span
            dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:bogdan@opensips.org" target="_blank">bogdan@opensips.org</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
            0.8ex; border-left: 1px solid rgb(204, 204, 204);
            padding-left: 1ex;">
            <div bgcolor="#ffffff" text="#000000"> <tt>Hi Tim,<br>
                <br>
                Could you send my (off list) the logs (in debug 4)
                covering the entire call (invite to last 500
                retransmission) ?<br>
                <br>
                Regarding the 500 - by default, in failure route, the
                received reply is forwarded to caller - in your case,
                the received 503 is fwded as 500 back (there is a
                translation from 503 to 500, according to RFC)<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 class="h5"> <br>
                  On 07/17/2012 09:10 PM, Tim Burke wrote: </div>
              </div>
              <blockquote type="cite">
                <div>
                  <div class="h5">
                    <div>Sorry about the large posting but I wanted to
                      included as many details a possible. &nbsp;I'm trying
                      to figure out why opensips seems to be ignoring
                      ACK received from far end when a 500 is sent.&nbsp;</div>
                    <div><br>
                    </div>
                    <div> This code in play is in my failure_route where
                      I'm reacting to 503 received from my internal
                      media gateway. &nbsp;It seems like osips is sending a
                      500 on my behalf even if I just exit the
                      failure_route. &nbsp;The far end relies to the 500 with
                      an ACK but osips seems to now like it and repeats
                      the process for a total of 3 500 messages sent
                      out.&nbsp;&nbsp;I'm on osips 1.6.2 and have the following in
                      the log. &nbsp;I'm not sure of the significance of:
                      "Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:sl:sl_filter_ACK:
                      to late to be a local ACK!"</div>
                    <div><br>
                    </div>
                    <div>sip proxy: 10.14.84.203</div>
                    <div>MG: 10.14.84.183</div>
                    <div>External system: 10.10.24.36</div>
                    <div><br>
                    </div>
                    <div>I'm wondering:</div>
                    <div>* Can/should I prevent osips from sending the
                      500 on my behalf?</div>
                    <div>* Why are the ACKs ignored by osips?</div>
                    <div><br>
                    </div>
                    <div>failure_route[11] {</div>
                    <div><br>
                    </div>
                    <div>&nbsp; &nbsp; if (t_was_cancelled()) {</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; exit;</div>
                    <div>&nbsp; &nbsp; }</div>
                    <div><br>
                    </div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; if ( ($T_reply_code=="604") ||
                      ($T_reply_code=="404") || ($T_reply_code=="486") )
                      {</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xlog("L_WARN", "Received
                      $T_reply_code from NVP:$avp(i:271) for callid
                      [$ci] - DID is most likely not configured");</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; route(5);</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; }</div>
                    <div> <br>
                    </div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; xlog("L_WARN","Route failed -
                      $avp(i:271) $avp(i:272) $avp(i:273)");</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; xlog("Details - (mf [$mF] ruri [$ru]
                      callid [$ci])");</div>
                    <div><br>
                    </div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; # ds_next_dst - will do the routing.</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; if (ds_next_dst()){</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xlog("L_INFO","First Route
                      Failed : Routing to $avp(i:271) $avp(i:272)
                      $avp(i:273)");</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xlog("Details - (mf [$mF] ruri
                      [$ru] callid [$ci])");</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xlog("L_INFO"," ");</div>
                    <div><br>
                    </div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; # relay the call to the new
                      destination</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; t_on_failure("11");</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; t_relay();</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; }</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; else {</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xlog("L_CRIT","ds_dispatcher
                      Sorry none of our gateways are available to take
                      your call.");</div>
                    <div><span style="white-space: pre-wrap;"> </span>exit;</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp; }</div>
                    <div>&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</div>
                    <div>}</div>
                    <div><br>
                    </div>
                    <div><br>
                    </div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27595]:
                      DBG:tm:t_retransmit_reply: buf=0x2af449a51620:
                      SIP/2.0 5..., shmem=0x2af44b3a0fa8: SIP/2.0 5</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27595]: DBG:tm:set_timer:
                      relative timeout is 2000000</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27595]:
                      DBG:tm:insert_timer_unsafe: [6]: 0x2af44b39a2f8
                      (14600000)</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27595]:
                      DBG:tm:retransmission_handler:
                      retransmission_handler : done</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_msg: SIP
                      Request:</div>
                    <div> Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_msg:
                      &nbsp;method: &nbsp;&lt;ACK&gt;</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_msg:
                      &nbsp;uri: &nbsp; &nbsp; &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_msg:
                      &nbsp;version: &lt;SIP/2.0&gt;</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_headers:
                      flags=2</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]:
                      DBG:core:parse_via_param: found param type 232,
                      &lt;branch&gt; =
                      &lt;z9hG4bK02B027d670e963c415e&gt;; state=16</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_via: end
                      of header reached, state=5</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_headers:
                      via found, flags=2</div>
                    <div> Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_headers:
                      this is the first via</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:receive_msg:
                      After parse_msg...</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:receive_msg:
                      preparing to run routing scripts...</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:sl:sl_filter_ACK:
                      to late to be a local ACK!</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]:
                      DBG:core:comp_scriptvar: str 20 : true</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_headers:
                      flags=100</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]:
                      DBG:core:parse_to_param: tag=aeac620b</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_to: end
                      of header reached, state=29</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:parse_to:
                      display={}, ruri={<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>}</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:get_hdr_field:
                      &lt;To&gt; [49]; uri=[<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>]</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:get_hdr_field:
                      to body [&lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;]</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:get_hdr_field:
                      cseq &lt;CSeq&gt;: &lt;25848&gt; &lt;ACK&gt;</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]:
                      DBG:maxfwd:is_maxfwd_present: value = 70</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]:
                      DBG:core:destroy_avp_list: destroying list
                      0x2af44b39a010</div>
                    <div>Jul 17 10:38:35 siphost
                      /usr/sbin/opensips[27582]: DBG:core:receive_msg:
                      cleaning up</div>
                    <div>Jul 17 10:38:36 siphost
                      /usr/sbin/opensips[27595]: DBG:tm:timer_routine:
                      timer routine:0,tl=0x2af44b39a5d8
                      next=0x2af44b39a7b0, timeout=13</div>
                    <div>Jul 17 10:38:36 siphost
                      /usr/sbin/opensips[27595]: DBG:tm:timer_routine:
                      timer routine:0,tl=0x2af44b39a7b0
                      next=0x2af44b39a988, timeout=13</div>
                    <div>Jul 17 10:38:36 siphost
                      /usr/sbin/opensips[27595]: DBG:tm:timer_routine:
                      timer routine:0,tl=0x2af44b39a988
                      next=0x2af44b39a328, timeout=13</div>
                    <div>Jul 17 10:38:36 siphost
                      /usr/sbin/opensips[27595]: DBG:tm:timer_routine:
                      timer routine:0,tl=0x2af44b39a328 next=(nil),
                      timeout=13</div>
                    <div>Jul 17 10:38:36 siphost
                      /usr/sbin/opensips[27595]:
                      DBG:tm:insert_timer_unsafe: [2]: 0x2af44b39a230
                      (18)</div>
                    <div><br>
                    </div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.14.84.183:5060" target="_blank">10.14.84.183:5060</a></div>
                    <div>INVITE <a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>
                      SIP/2.0.</div>
                    <div>Via: SIP/2.0/UDP
                      10.14.84.203;branch=z9hG4bK050f.4234dfd2.3.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 INVITE.</div>
                    <div>Max-Forwards: 13.</div>
                    <div>Allow: INVITE, ACK, CANCEL, BYE, REGISTER,
                      REFER, INFO, SUBSCRIBE, NOTIFY, PRACK, UPDATE,
                      OPTIONS, MESSAGE, PUBLISH.</div>
                    <div>Accept: application/sdp, application/isup,
                      application/dtmf, application/dtmf-relay,
                      multipart/mixed.</div>
                    <div>Contact: &lt;<a moz-do-not-send="true"
                        href="http://sip:9995551212@10.10.24.36:5060"
                        target="_blank">sip:9995551212@10.10.24.36:5060</a>&gt;.</div>
                    <div>P-Asserted-Identity: "9995551212" &lt;<a
                        moz-do-not-send="true"
                        href="http://sip:9995551212@10.10.24.36:5060"
                        target="_blank">sip:9995551212@10.10.24.36:5060</a>&gt;,

                      "9995551212" &lt;tel:9995551212&gt;.</div>
                    <div>Supported: timer, 100rel.</div>
                    <div>Session-Expires: 1800.</div>
                    <div>Min-SE: 90.</div>
                    <div>Content-Disposition: session;
                      handling=required.</div>
                    <div>Content-Type: application/sdp.</div>
                    <div>Content-Length: 314.</div>
                    <div>.</div>
                    <div>v=0.</div>
                    <div>o=Sonus_UAC 11709 17649 IN IP4 10.10.24.36.</div>
                    <div>s=SIP Media Capabilities.</div>
                    <div>c=IN IP4 216.115.26.209.</div>
                    <div>t=0 0.</div>
                    <div>m=audio 11676 RTP/AVP 0 18 2 100.</div>
                    <div>a=rtpmap:0 PCMU/8000.</div>
                    <div>a=rtpmap:18 G729/8000.</div>
                    <div>a=fmtp:18 annexb=no.</div>
                    <div>a=rtpmap:2 G726-32/8000.</div>
                    <div>a=rtpmap:100 telephone-event/8000.</div>
                    <div>a=fmtp:100 0-15.</div>
                    <div>a=sendrecv.</div>
                    <div>a=maxptime:20.</div>
                    <div> <br>
                    </div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.14.84.183:5060" target="_blank">10.14.84.183:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a></div>
                    <div>SIP/2.0 503 Service Unavailable.</div>
                    <div>Via: SIP/2.0/UDP
                      10.14.84.203;branch=z9hG4bK050f.4234dfd2.3.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 INVITE.</div>
                    <div>User-Agent: NVP/4.0.1-CT79038 .</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div> <br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.14.84.183:5060" target="_blank">10.14.84.183:5060</a></div>
                    <div>ACK <a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>
                      SIP/2.0.</div>
                    <div>Via: SIP/2.0/UDP
                      10.14.84.203;branch=z9hG4bK050f.4234dfd2.3.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>CSeq: 25848 ACK.</div>
                    <div>Max-Forwards: 70.</div>
                    <div>User-Agent: OpenSIPS (1.6.2-notls
                      (x86_64/linux)).</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a>
                      -&gt; external:5060</div>
                    <div>SIP/2.0 500 Service Unavailable.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div> Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 INVITE.</div>
                    <div>User-Agent: NVP/4.0.1-CT79038 .</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.10.24.36:5060" target="_blank">10.10.24.36:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a></div>
                    <div>ACK <a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>
                      SIP/2.0.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 ACK.</div>
                    <div>Max-Forwards: 70.</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.10.24.36:5060" target="_blank">10.10.24.36:5060</a></div>
                    <div>SIP/2.0 500 Service Unavailable.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 INVITE.</div>
                    <div>User-Agent: NVP/4.0.1-CT79038 .</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.10.24.36:5060" target="_blank">10.10.24.36:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a></div>
                    <div>ACK <a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>
                      SIP/2.0.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 ACK.</div>
                    <div>Max-Forwards: 70.</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.10.24.36:5060" target="_blank">10.10.24.36:5060</a></div>
                    <div>SIP/2.0 500 Service Unavailable.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 INVITE.</div>
                    <div>User-Agent: NVP/4.0.1-CT79038 .</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div><br>
                    </div>
                    <div>U <a moz-do-not-send="true"
                        href="http://10.10.24.36:5060" target="_blank">10.10.24.36:5060</a>
                      -&gt; <a moz-do-not-send="true"
                        href="http://10.14.84.203:5060" target="_blank">10.14.84.203:5060</a></div>
                    <div>ACK <a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>
                      SIP/2.0.</div>
                    <div>Via: SIP/2.0/UDP
                      10.10.24.36:5060;branch=z9hG4bK02B027d670e963c415e.</div>
                    <div>From:
                      <a moz-do-not-send="true">&lt;sip:9995551212@10.10.24.36:5060;pstn-params=9084818088&gt;</a>;tag=gK0201303f.</div>
                    <div>To: &lt;<a moz-do-not-send="true"
                        href="http://sip:2025551212@10.14.84.203:5060"
                        target="_blank">sip:2025551212@10.14.84.203:5060</a>&gt;;tag=aeac620b.</div>
                    <div>Call-ID: <a moz-do-not-send="true"
                        href="mailto:335708310_82542752@10.10.24.36"
                        target="_blank">335708310_82542752@10.10.24.36</a>.</div>
                    <div>CSeq: 25848 ACK.</div>
                    <div>Max-Forwards: 70.</div>
                    <div>Content-Length: 0.</div>
                    <div>.</div>
                    <div><br>
                    </div>
                    <div>--&nbsp;</div>
                    <div>Thanks,</div>
                    <div>Tim</div>
                    <div><br>
                    </div>
                    <div>
                      <div>
                        <div>
                          <div>
                            <div>.</div>
                            <div><br>
                            </div>
                            -- <br>
                            Thanks,<br>
                            Tim<br>
                            <br>
                            <br>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
                <pre><fieldset></fieldset>
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</pre>
              </blockquote>
            </div>
          </blockquote>
        </div>
        <br>
        <br clear="all">
        <div><br>
        </div>
        -- <br>
        Thanks,<br>
        Tim<br>
        <br>
        978-267-1001<br>
      </div>
    </blockquote>
  </body>
</html>