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    <div class="moz-cite-prefix">Hello Brian,<br>
      <br>
      thanks for the hint. In the meantime, I tried both, setting zrtp
      globally in Freeswitch and having zrtp in the original dialplan
      and in the {}-Variables for dialing the B party. This did not
      help.<br>
      <br>
      Then I totally disabled ZRTP inside FSs and in the dialplans and
      grepped on the network. Then I issued a "uuid_media off" for
      starting a reinvite between the 2 endpoints. On the Freeswitch
      console, I could see, that ZRTP is exchanged in the SDP, although
      Freeswitch does a reinvite with ZRTP.<br>
      Having a look at the channel variables, I could see that<br>
      <ul>
        <li>variable_rtp_local_sdp_str does _not_ contain ZRTP</li>
        <li>variable_switch_m_sdp _does_ contain ZRTP</li>
        <li>variable_switch_r_sdp _does_ contain ZRTP</li>
      </ul>
      <p>But ZRTP however is not started on both sides. Then I killed
        Freeswitch during a call and started again, the calls were
        automatically recovered, and ZRTP was there. But this was surely
        done with a normal invite, right?<br>
      </p>
      <p>I tried with CsipSimple on Android and Jitsi nightly on Ubuntu.
        Both clients behave the same. I assume, that they will not start
        ZRTP on a reinvite.<br>
      </p>
      <p>So unless there is now way to reistablish a call (I tried
        uuid_transfer to the same number with autoanswer, but target
        number was still considered as busy), I think it will not work.<br>
      </p>
      <p>Any other hints?<br>
      </p>
      Best regards <br>
      Peter<br>
      <br>
      <br>
      <br>
      On 02/10/15 16:05, Brian West wrote:<br>
    </div>
    <blockquote
cite="mid:CAEJMVkB8M_cTBA0sRJiXxyRN01vkZNCfkNBN9qE32edT=ZrhFw@mail.gmail.com"
      type="cite">
      <div dir="ltr">You can't set the zrtp_secure_media=true after a
        session is created, it needs to be a global or you set it inside
        the {} on the bridge or originate line. &nbsp; &nbsp;Then you're outlining
        uuid_media off, which would make the media go between the two
        endpoints, FreeSWITCH isn't even involved in the zrtp exchange
        at that point.&nbsp; Technically your endpoints should be the ones
        doing this and ZRTP should be disabled in FreeSWITCH, You really
        only need ZRTP with MiTM if you MUSt transcode or you're
        terminating directly on the FreeSWITCH instance. &nbsp; I should
        really just rip out MiTM support.</div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Tue, Feb 10, 2015 at 5:53 AM, Peter
          Steinbach <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:lists@telefaks.de" target="_blank">lists@telefaks.de</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div bgcolor="#FFFFFF" text="#000000"> Hello,<br>
              <br>
              I want to establish ZRTP, after I am bridging 2 calls,
              which have been active already before.<br>
              <br>
              My scenario is as follows:<br>
              <ul>
                <li>Caller A is calling Freeswitch, the call is answered
                  and an announcement is played</li>
                <li>In the meantime Freeswitch calls another Party B and
                  connects it to an internal IVR, where also
                  announcements are played.</li>
                <li>Now, after a while, I decide to connect the calls
                  together, then send an "uuid_media off &lt;uuid&gt;"
                  to the calling party A leg, reinvites occur and bypass
                  media works.</li>
                <li>However the 2 SIP clients (Csipsimple) do not start
                  a ZRTP session</li>
                <li>If caller A calls B directly via bypass media, the
                  ZRTP is active, by the way.<br>
                </li>
              </ul>
              <p>I suspect that ZRTP somehow should be forced or
                triggered. Is there a way to do that? I already invited
                the B leg with "zrtp_secure_media=true" and issued</p>
              <p>&nbsp; uuid_setvar 1bd508af-19c7-4e38-8621-731baaf33920
                zrtp_secure_media true<br>
                &nbsp; uuid_media off 1bd508af-19c7-4e38-8621-731baaf33920<br>
                to the A leg. But this did not work.<br>
              </p>
              <p>The main question should be: How can I trigger a ZRTP
                connection on an existing call?<span class="HOEnZb"><font
                    color="#888888"><br>
                  </font></span></p>
              <span class="HOEnZb"><font color="#888888"> <br>
                  <pre cols="72">-- 
With kind regards
Peter Steinbach 

Telefaks Services GmbH
<a moz-do-not-send="true" href="mailto:lists" target="_blank">mailto:lists</a> (att) <a moz-do-not-send="true" href="http://telefaks.de" target="_blank">telefaks.de</a>
Internet: <a moz-do-not-send="true" href="http://www.telefaks.de" target="_blank">www.telefaks.de</a>

</pre>
                </font></span></div>
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          </blockquote>
        </div>
        <br>
        <br clear="all">
        <div><br>
        </div>
        -- <br>
        <div class="gmail_signature">
          <div dir="ltr">
            <p><font face="courier new, monospace"><b><i><font size="4">Brian
                      West</font></i></b><br>
                <span style="font-size:x-small"><a
                    moz-do-not-send="true"
                    href="mailto:brian@freeswitch.org" target="_blank">brian@freeswitch.org</a></span></font></p>
            <p><font face="courier new, monospace" size="1"><img
                  moz-do-not-send="true"
                  src="http://billing.freeswitch.org/templates/default/img/whmcslogo.png"><br>
              </font></p>
            <p><font face="courier new, monospace"><b><i>Twitter:
                    @FreeSWITCH , @briankwest</i></b><br>
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                  href="http://www.freeswitchbook.com" target="_blank">http://www.freeswitchbook.com</a><br>
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                  href="http://www.freeswitchcookbook.com"
                  target="_blank">http://www.freeswitchcookbook.com</a></font></p>
            <p><font face="courier new, monospace"><b>T:</b>+19184209001
                | <b>F:</b>+19184209002 | <b>M:</b>+1918424WEST (9378)<br>
                <b>iNUM:</b>+883 5100 1420 9001 |&nbsp;<b>ISN:</b>410*543 |&nbsp;<b>Skype:</b>briankwest</font></p>
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      <br>
      <pre wrap="">_________________________________________________________________________
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    </blockquote>
    <br>
    <br>
    <pre class="moz-signature" cols="72">-- 
With kind regards
Peter Steinbach 

Telefaks Services GmbH
<a class="moz-txt-link-freetext" href="mailto:lists">mailto:lists</a> (att) telefaks.de
Internet: <a class="moz-txt-link-abbreviated" href="http://www.telefaks.de">www.telefaks.de</a>

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