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    <div class="moz-cite-prefix">Ok,<br>
      What client is that which is not support T38 negotiation.<br>
      Sorry, but you have to fix a client issue on server side, this is
      something awkward.<br>
      <br>
      So you should remove that T38 codecs then.<br>
      The following module may help:<br>
      <br>
      <a class="moz-txt-link-freetext" href="http://kamailio.org/docs/modules/4.0.x/modules/sdpops.html">http://kamailio.org/docs/modules/4.0.x/modules/sdpops.html</a><br>
      <br>
      Try to have a look at this.<br>
      <br>
      Daniel<br>
      <br>
      <br>
      <br>
      On 06/26/2014 10:18 AM, Leopoldo Iglesia wrote:<br>
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    <blockquote cite="mid:53ABD738.3010107@por-aire.es" type="cite">
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      <div class="moz-cite-prefix">When the proxy answer the 488, next
        packet is other invite.. and no more.<br>
        <br>
        The problem is that the SDP packet comes withh all codecs like
        this<br>
        <br>
        <img src="cid:part1.06070906.03030008@sipwise.com" alt=""><br>
        <br>
        El 20/06/2014 14:09, Daniel Grotti escribió:<br>
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        <div class="moz-cite-prefix">Hi,<br>
          If you want to discard all INVITEs with T38, you can try to
          add something like that in your
          /etc/ngcp-config/templates/etc/kamailio/proxy/proxy.cfg.customtt.tt2:<br>
          <br>
          <br>
          if(is_method("INVITE") && search_body("udptl"))<br>
          {<br>
             sl_send_reply("488", "Not Acceptable Here");<br>
             exit;<br>
          }<br>
          <br>
          before to send the invite to ROUTE_INVITE.<br>
          Then run "ngcpcfg apply".<br>
          <br>
          So, each INVITE/REINVITE with udpl in their body will be
          discarded.<br>
          <br>
          <br>
          Daniel<br>
          <br>
          <br>
          <br>
          <br>
          On 06/20/2014 01:35 PM, Daniel Grotti wrote:<br>
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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>
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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>
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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 >>>
                  >>>
                  _______________________________________________
                  >>> Spce-user mailing list >>> <a
                    moz-do-not-send="true"
                    class="moz-txt-link-abbreviated"
                    href="mailto:Spce-user@lists.sipwise.com">Spce-user@lists.sipwise.com</a>
                  >>> <a moz-do-not-send="true"
                    class="moz-txt-link-freetext"
                    href="http://lists.sipwise.com/listinfo/spce-user">http://lists.sipwise.com/listinfo/spce-user</a>
                  >> >>
                  _______________________________________________
                  >> Spce-user mailing list >> <a
                    moz-do-not-send="true"
                    class="moz-txt-link-abbreviated"
                    href="mailto:Spce-user@lists.sipwise.com">Spce-user@lists.sipwise.com</a>
                  >> <a moz-do-not-send="true"
                    class="moz-txt-link-freetext"
                    href="http://lists.sipwise.com/listinfo/spce-user">http://lists.sipwise.com/listinfo/spce-user</a>
                  > > <br>
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