It is, but again, not very often.<span></span><br><br>On Friday, August 28, 2015, Ben Langfeld &lt;<a href="mailto:ben@langfeld.co.uk">ben@langfeld.co.uk</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On 28 August 2015 at 05:42, Marcin S <span dir="ltr">&lt;<a href="javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;ms4esl@gmail.com&#39;);" target="_blank">ms4esl@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Yes, it is not common for all providers to send 181. However, there are some that do, </div></blockquote><div><br></div><div>If this was signalled on the PSTN then I think I might cry with joy.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">and I want to receive it in ESL. Is there any possiblity for this?<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">2015-08-27 15:20 GMT+02:00 Brian West <span dir="ltr">&lt;<a href="javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;brian@freeswitch.org&#39;);" target="_blank">brian@freeswitch.org</a>&gt;</span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I don&#39;t think you will reliably receive a 181 in every case that a call goes to voicemail.</div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Thu, Aug 27, 2015 at 5:20 AM, Marcin S <span dir="ltr">&lt;<a href="javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;ms4esl@gmail.com&#39;);" target="_blank">ms4esl@gmail.com</a>&gt;</span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr"><div><div><div>Hi,<br><br></div>I have a dialer app that uses ESL and freeswitch. I would like to detect when voice mail answers call. For such calls there is a &quot;181 Cal Is Being Forwarded&quot; message in SIP signalization.<br></div>However, in ESL there is no event fired (maybe beacuse there was 183 and 180 earlier).<br><br></div>How can I detect, that there was 181 received?<br><br><div><div><div>Here is an example sip trace:<br></div><div><br>  1   0.000000 192.168.88.237 -&gt; 89.108.20.42 SIP/SDP Request: INVITE <a href="javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;sip:123456789@89.108.20.42&#39;);" target="_blank">sip:123456789@89.108.20.42</a>, with session description<br>  2   0.018028 89.108.20.42 -&gt; 192.168.88.237 SIP Status: 100 Trying<br>  3   0.418550 89.108.20.42 -&gt; 192.168.88.237 SIP/SDP Status: 183 Session Progress, with session description<br>  4   1.405465 89.108.20.42 -&gt; 192.168.88.237 SIP Status: 180 Ringing<br>  5  29.270672 89.108.20.42 -&gt; 192.168.88.237 SIP Status: 181 Call Is Being Forwarded<br>  6  29.659371 89.108.20.42 -&gt; 192.168.88.237 SIP/SDP Status: 200 OK, with session description<br>  7  29.670833 192.168.88.237 -&gt; 89.108.20.42 SIP Request: ACK sip:3c6d5343fb70df3a18f4dd32e7c9d226@89.108.20.42:5060;transport=udp<br>  8  70.590778 192.168.88.237 -&gt; 89.108.20.42 SIP Request: BYE sip:3c6d5343fb70df3a18f4dd32e7c9d226@89.108.20.42:5060;transport=udp<br>  9  70.625224 89.108.20.42 -&gt; 192.168.88.237 SIP Status: 200 OK<br><br></div></div></div></div>
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<p><font face="courier new, monospace"><b><i><font size="4">Brian West</font></i></b><br><span style="font-size:x-small"><a href="javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;brian@freeswitch.org&#39;);" target="_blank">brian@freeswitch.org</a></span></font></p>
<p><font face="courier new, monospace" size="1"><img src="http://billing.freeswitch.org/templates/default/img/whmcslogo.png"><br></font></p><p><font face="monospace, monospace" size="2"><b><i>Twitter: @FreeSWITCH , @briankwest</i></b><br><a href="http://www.freeswitchbook.com" target="_blank">http://www.freeswitchbook.com</a><br><a href="http://www.freeswitchcookbook.com" target="_blank">http://www.freeswitchcookbook.com</a></font></p><p><font face="monospace, monospace">Got Bugs? Report them <a href="https://freeswitch.org/jira" target="_blank">here</a>! | Reddit: <a href="https://www.reddit.com/r/freeswitch" target="_blank">/r/freeswitch</a></font></p>
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