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<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>Dear Kamailians,</span></span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><font face="Calibri, sans-serif"><span style="font-size:14.6667px">does anyone have any idea on the issue below?</span></font><br></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:11pt">Alessio told me that is always reproducible, and he can also provide captures and more logs. </span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:11pt"><br></span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:11pt">Thanks in advance!</span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:11pt">Matteo </span><br></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span><br></span></span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><br></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span><br></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><a name="m_-4609932790304289415__MailOriginal"><b><span style="font-size:12pt;color:black">From: </span></b></a><span><span style="font-size:12pt;color:black">sr-users <<a href="mailto:sr-users-bounces@lists.kamailio.org" target="_blank">sr-users-bounces@lists.<wbr>kamailio.org</a>> on behalf of Alessio Miranda <<a href="mailto:smirolandia@gmail.com" target="_blank">smirolandia@gmail.com</a>><br>
<b>Reply-To: </b>"Kamailio (SER) - Users Mailing List" <<a href="mailto:sr-users@lists.kamailio.org" target="_blank">sr-users@lists.kamailio.org</a>><br>
<b>Date: </b>Tuesday, 16 January 2018 at 14:18<br>
<b>To: </b>"<a href="mailto:sr-users@lists.kamailio.org" target="_blank">sr-users@lists.kamailio.org</a>" <<a href="mailto:sr-users@lists.kamailio.org" target="_blank">sr-users@lists.kamailio.org</a>><br>
<b>Subject: </b>[SR-Users] Blind Transfer WS Error<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span><span> </span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>Hi,<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span><span> </span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>I have a problem with the blind transfer via WebSocket,<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>debugging from the browser we see that in some cases when the REFER is <span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>done and the sip message "202 Accepted" arrives, <span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>the message "180 Ringing" arrives first and then the "100 Trying" <span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>and the transfer goes in error with "500 JsSIP Internal Error"<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span><span> </span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>I have an architecture with Kamailio in frontend and asterisk in backend <span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>on the same network, the sip dialogue between FE and BE is in SIP / UDP.<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>The WebRTC client connects to WebSocket at Kamailio's public address.<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span><span> </span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>We have verified that the sip messages exchanged between kamailio and <span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>asterisk are always correct.<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span><span> </span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>Kamailio Ver. 4.4.4<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>Asterisk Ver. 13.18.3<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>PJSIP Ver. 2.6<span></span></span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span><span>JSSIP Ver. 3.2.2<br>
<br>Thanks<br>Alessio</span></span><span><span></span></span></p>

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