This will probably take some good old fashioned detective work on your part. I&#39;d recommend gathering all the information about your topology, devices, etc. and putting it in <a href="http://pastebin.freeswitch.org">pastebin.freeswitch.org</a>. I&#39;d also get a pcap of he traffic on the FS box (including media) and analyze in Wireshark. Assuming that you don&#39;t have an ATA causing the echo then you&#39;re looking at the more traditional network issues like delay.<br>
<br>You might want to start going down the rabbit hole by checking out this article and the links therein:<br><a href="http://networkinstruments.wordpress.com/2007/10/25/voip-troubleshooting-exploring-echo-echo-and-delay/">http://networkinstruments.wordpress.com/2007/10/25/voip-troubleshooting-exploring-echo-echo-and-delay/</a><br>
<br>I&#39;m not saying it&#39;s not FreeSWITCH, but since we use it all day, every day, and the only echo issues we ever have are related to network issues, I&#39;d recommend barking up that tree first.<br><br>-MC<br><br>
<div class="gmail_quote">On Fri, Oct 1, 2010 at 1:01 PM, Alan Dawson <span dir="ltr">&lt;<a href="mailto:aland@burngreave.net">aland@burngreave.net</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
On Fri, Oct 01, 2010 at 01:46:37PM -0400, Sergey Okhapkin wrote:<br>
&gt; The question is not related to FS. Lower speaker volume on user&#39;s phone.<br>
<br>
hi, interesting response.<br>
<br>
When we dont use the FS box, and just make a direct connection to the VOIP provider no echo occurs.<br>
<br>
This leads me to believe that it is an artefact related to the PBX<br>
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