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    <p><font face="Cantarell">Thank you for reply,</font></p>
    <p><font face="Cantarell">I fixed Contact header in ACK, but Microsoft still unhappy call drops after 20 sec.</font></p>
    <p><font face="Cantarell">ACK debug
</font></p>
    <p><a href="https://paste.centos.org/view/21b816d1">https://paste.centos.org/view/21b816d1</a></p>
    <p>volga629
</p>
    <div class="moz-cite-prefix">On 4/18/20 5:54 AM, Johan De Clercq
      wrote:<br>
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cite="mid:AM0PR06MB6226A90516E043665DA0448BA7D60@AM0PR06MB6226.eurprd06.prod.outlook.com">
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          <div style="direction: ltr;">Please find  the necessary manips
            in this doc.</div>
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          </div>
          <div style="direction: ltr;"><a class="moz-txt-link-freetext" href="https://www.oracle.com/webfolder/technetwork/acmepacket/Microsoft/SBC-MSFTTeams-NON-MB.pdf">https://www.oracle.com/webfolder/technetwork/acmepacket/Microsoft/SBC-MSFTTeams-NON-MB.pdf</a></div>
          <div><br>
          </div>
          <div style="direction: ltr;"><a class="moz-txt-link-freetext" href="https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/">https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/</a></div>
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        <div class="ms-outlook-ios-signature"><a
            href="https://aka.ms/o0ukef" moz-do-not-send="true">Outlook
            voor iOS</a> downloaden</div>
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      <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
          face="Calibri, sans-serif" color="#000000"><b>Van:</b> Users
          <a class="moz-txt-link-rfc2396E" href="mailto:users-bounces@lists.opensips.org"><users-bounces@lists.opensips.org></a> namens volga629 via
          Users <a class="moz-txt-link-rfc2396E" href="mailto:users@lists.opensips.org"><users@lists.opensips.org></a><br>
          <b>Verzonden:</b> Saturday, April 18, 2020 3:38:33 AM<br>
          <b>Aan:</b> OpenSIPS users mailling list
          <a class="moz-txt-link-rfc2396E" href="mailto:users@lists.opensips.org"><users@lists.opensips.org></a><br>
          <b>Onderwerp:</b> [OpenSIPS-Users] ms teams ACK</font>
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        <p><font face="Cantarell">Hello Everyone,</font></p>
        <p><font face="Cantarell">Is possible rewrite ACK contact header in dialog ?</font></p>
        <p><font face="Cantarell">My guess it expecting FQDN. </font></p>
        <p><font face="Cantarell">MS Teams disconnect the call after 20 sec</font> </p>
        <p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; text-indent:0px">
REASON: Q.850;cause=18;text="bc427610-edae-47b9-9daa-7ea74d40dcc7;Call Controller timed out while waiting for acknowledgement."</p>
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        <p>In this case ACK come from asterisk box.  </p>
        <p>Opensips Log:</p>
        <p>/usr/sbin/opensips[3321]: [IN-DIALOG] [ACK] Contact header ~> [<a class="x_moz-txt-link-rfc2396E" href="sip:11988582770@190.109.68.250:5060" moz-do-not-send="true"><sip:11988582770@190.109.68.250:5060></a>
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        <p>volga629 </p>
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