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    <div class="moz-cite-prefix">The kamailio proxy log says this, when
      endponint tries to negotiate as fax, when it´s voice call<br>
      <br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Setting PPI to
      '<a class="moz-txt-link-rfc2396E" href="mailto:sip:984099520@154.58.3.135"><sip:984099520@154.58.3.135></a>' -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Prepare Diversion setting -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: No selector set, not setting CLI -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Prepare History-Info setting -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: No selector set, not setting CLI -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Applying callee-out domain rewrite rules using
      dpid '4' - <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: No matching rewrite rules for 'x1008' found -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Setting P-Called-Party-ID
      '<a class="moz-txt-link-rfc2396E" href="mailto:sip:x1008@154.58.3.135"><sip:x1008@154.58.3.135></a>' - <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a>
      <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Writing sbc parameters 
      ;aleg_sst_enable=no;sst_enable=no - <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a>
      <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Appending P-D-URI
      '<a class="moz-txt-link-abbreviated" href="mailto:sip:lb@127.0.0.1;lr;socket=">sip:lb@127.0.0.1;lr;socket=</a>'sip:154.58.3.135:5060'' -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Forcing request via B2BUA 'sip:127.0.0.1:5080' -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO:
      <script>: Request leaving server, D-URI='sip:127.0.0.1:5080'
      - <a class="moz-txt-link-abbreviated" href="mailto:R=sip:x1008@154.58.3.159:5060">R=sip:x1008@154.58.3.159:5060</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2403]: INFO:
      <script>: NAT-Reply - S=100 - Connecting M=INVITE
      IP=154.58.3.158:5060 (127.0.0.1:5080) <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2395]: INFO:
      <script>: NAT-Reply - S=180 - Ringing M=INVITE
      IP=154.58.3.158:5060 (127.0.0.1:5080) <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: INFO:
      <script>: New request - M=CANCEL
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:984099519@154.58.3.135">R=sip:984099519@154.58.3.135</a> <a class="moz-txt-link-abbreviated" href="mailto:F=sip:x1009@154.58.3.135">F=sip:x1009@154.58.3.135</a>
      <a class="moz-txt-link-abbreviated" href="mailto:T=sip:984099519@154.58.3.135">T=sip:984099519@154.58.3.135</a> IP=154.58.3.158:5060 (127.0.0.1:5060)
      <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: INFO:
      <script>: Stop mediaproxy for current branch using first Via
      - <a class="moz-txt-link-abbreviated" href="mailto:R=sip:984099519@154.58.3.135">R=sip:984099519@154.58.3.135</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: ERROR: rtpproxy-ng
      [rtpproxy.c:1348]: proxy replied with error: Call-ID not found or
      tags didn't match<br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: INFO:
      <script>: Request leaving server via local route -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:984099519@154.58.3.135">R=sip:984099519@154.58.3.135</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO:
      <script>: NAT-Reply - S=487 - Request terminated M=INVITE
      IP=154.58.3.158:5060 (127.0.0.1:5080) <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO:
      <script>: Failure route for local call -
      <a class="moz-txt-link-abbreviated" href="mailto:R=sip:984099519@154.58.3.135">R=sip:984099519@154.58.3.135</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO:
      <script>: Stop mediaproxy for current branch using first Via
      - <a class="moz-txt-link-abbreviated" href="mailto:R=sip:984099519@154.58.3.135">R=sip:984099519@154.58.3.135</a> <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: ERROR: rtpproxy-ng
      [rtpproxy.c:1348]: proxy replied with error: Call-ID not found or
      tags didn't match<br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO:
      <script>: Final reply - <a class="moz-txt-link-abbreviated" href="mailto:R=sip:984099519@154.58.3.135">R=sip:984099519@154.58.3.135</a>
      <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2401]: INFO:
      <script>: New request - M=ACK <a class="moz-txt-link-abbreviated" href="mailto:R=sip:984099519@154.58.3.135">R=sip:984099519@154.58.3.135</a>
      <a class="moz-txt-link-abbreviated" href="mailto:F=sip:x1009@154.58.3.135">F=sip:x1009@154.58.3.135</a> <a class="moz-txt-link-abbreviated" href="mailto:T=sip:984099519@154.58.3.135">T=sip:984099519@154.58.3.135</a>
      IP=154.58.3.158:5060 (127.0.0.1:5060) <a class="moz-txt-link-abbreviated" href="mailto:ID=15059@154.58.3.158">ID=15059@154.58.3.158</a><br>
      <br>
      <br>
      <br>
      El 20/06/2014 13:54, Leopoldo Iglesia escribió:<br>
    </div>
    <blockquote cite="mid:53A42107.2050700@por-aire.es" type="cite">
      <meta content="text/html; charset=ISO-8859-1"
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      <div class="moz-cite-prefix">Ok. "has_totag" where is located ??<br>
        <br>
        El 20/06/2014 13:35, Daniel Grotti escribió:<br>
      </div>
      <blockquote cite="mid:53A41C97.7010403@sipwise.com" type="cite">
        <meta content="text/html; charset=ISO-8859-1"
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        <div class="moz-cite-prefix">I have nothing ready to give you
          right now.<br>
          Basically on kamailio proxy you should match a Re-invite
          (using the "has_totag") and check if SDP contains t38
          headers/codec (just have a look how the T38 reinvite looks
          like).<br>
          So, if you receive a re-invite with T38 headers into SDP, just
          send back a 488 reply.<br>
          <br>
          Daniel<br>
          <br>
          <br>
          <br>
          <br>
          <br>
          On 06/20/2014 01:28 PM, Leopoldo Iglesia wrote:<br>
        </div>
        <blockquote cite="mid:53A41AE6.5090106@por-aire.es" type="cite">
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          <div class="moz-cite-prefix">Fine, how can I do this hack?
            cause endpoints is impossible to mod config, so they are
            rented and provisioned by an ftth operator.<br>
            <br>
            El 20/06/2014 13:23, Daniel Grotti escribió:<br>
          </div>
          <blockquote cite="mid:53A419B7.4020609@sipwise.com"
            type="cite">
            <meta content="text/html; charset=ISO-8859-1"
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            <div class="moz-cite-prefix">Hi,<br>
              I think you need to avoid to forward the T38 Re-INVITE, so
              you should hack your SPCE in order to reply to the T38
              re-invite with a "488 Not acceptable here", for example.<br>
              So the sender SHOULD fallback to G711.<br>
              Anyway, the best solution if you have endpoint with t38
              enabled but they don't work well, is to disable t38.<br>
              <br>
              <br>
              Daniel<br>
              <br>
              <br>
              <br>
              On 06/20/2014 01:15 PM, Leopoldo Iglesia wrote:<br>
            </div>
            <blockquote cite="mid:53A417ED.1010805@por-aire.es"
              type="cite">
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                > But both endpoints support it, that is the problem
                and the only > scenario when it fails, so i want SPCE
                not to send Fax negotiation to > endpoint,.<br>
                <br>
                <br>
                <br>
                 El 20/06/2014 12:12, Daniel Grotti escribió: >>
                Hi, >> that's strange, if one of the endpoints try
                to switch to t38 and the >> other endpoint doesn't
                support it, they should fallback to G711. >>
                >> Daniel >> >> >> >>
                >> >> >> On 06/20/2014 01:33 AM,
                Leopoldo Iglesia wrote: >>> How can I,
                blacklist t.38 to avoid endpoints to try t38
                negotiation? >>> >>> When i call from
                ericcson ont to fax capable endpoint, it try to
                >>> connect t38 fax and There is no voice.
                >>> >>> Thanks >>>
                >>> Leopoldo iglesia >>> >>>
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