<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Trajan Pro";
panose-1:0 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Verdana","sans-serif";}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Verdana","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:2046833362;
mso-list-type:hybrid;
mso-list-template-ids:-753259578 67698703 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>I feel your pain. The number one complaint from my customers switching to VOIP is the frequent presence of echo. Many times the echo is quite quiet and is easily ignored. Other times it is neither soft nor a short delay increasing the annoyance level. (The number 2 complaint is delay in connecting to the number being called).<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I have read LOTS of articles and blogs and wikis on the subject. The prevailing wisdom seems to be:<o:p></o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>The echo is always caused by the phone or equipment on the far end of your call! Presumably the phone or device on the far end of the call does not have good echo cancellation. My question is “If so, why is it ALMOST exclusively a VOIP problem?” Also, for FS developers, “Why is it so much more prevalent than when I was on Vonage for years?”<br><br><o:p></o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>VOIP is clearer than analog. The times when nobody is speaking on VOIP can even cause “Are you still there?” questions. That exacerbates the echo problem. When the quite levels are SO quiet, a little echo goes a long way. <br><br><o:p></o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>A significant number people have just adopted the idea that “Echo is part of life, get used to it. Also, tell the person you are talking to they need a phone upgrade.” I will attest to having had my business partner switch from speaker to handset to headphone and noticed a perceivable difference in echo levels.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>So, Anthony et. al. is this something that COULD be addressed if we put a ransom on it or is it just beyond the scope of what can be done in FS? Analog providers and Vonage have addressed the issue to the point that people are content. My customers are far from content. I THINK we could raise some real money if this is fixable – I would start the pot with a couple of hundred bucks. On the other hand, I am ignorant of the underlying issues and those other folks may have very expensive hardware addressing the issue. Please educate me.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>As a follow up question, does my VOIP topology affect this issue? I use a fairly large, fast, dedicated server collocated at my primary VOIP provider for fastest connect speeds. ALL of my users (and I) are remote connects. I get varying levels of echo calling from my Cisco SPA504G in Baltimore to my partner on his Cisco504G in Milwaukee on the same FS box. Granted it is usually quite low levels in that scenario, but it is sporadically quite annoying. The worst part is having NO ANSWER for (new) customers.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Sean<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>-----Original Message-----<br>From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Mimiko<br>Sent: Sunday, March 17, 2013 8:49 AM<br>To: FreeSWITCH Users Help<br>Subject: Re: [Freeswitch-users] Removing echo.</p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Some one. Some thought about this?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>--<o:p></o:p></p><p class=MsoPlainText>Mimiko desu.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>_________________________________________________________________________<o:p></o:p></p><p class=MsoPlainText>Professional FreeSWITCH Consulting Services:<o:p></o:p></p><p class=MsoPlainText><a href="mailto:consulting@freeswitch.org"><span style='color:windowtext;text-decoration:none'>consulting@freeswitch.org</span></a><o:p></o:p></p><p class=MsoPlainText><a href="http://www.freeswitchsolutions.com"><span style='color:windowtext;text-decoration:none'>http://www.freeswitchsolutions.com</span></a><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>FreeSWITCH-powered IP PBX: The CudaTel Communication Server <a href="http://www.cudatel.com"><span style='color:windowtext;text-decoration:none'>http://www.cudatel.com</span></a><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Official FreeSWITCH Sites<o:p></o:p></p><p class=MsoPlainText><a href="http://www.freeswitch.org"><span style='color:windowtext;text-decoration:none'>http://www.freeswitch.org</span></a><o:p></o:p></p><p class=MsoPlainText><a href="http://wiki.freeswitch.org"><span style='color:windowtext;text-decoration:none'>http://wiki.freeswitch.org</span></a><o:p></o:p></p><p class=MsoPlainText><a href="http://www.cluecon.com"><span style='color:windowtext;text-decoration:none'>http://www.cluecon.com</span></a><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>FreeSWITCH-users mailing list<o:p></o:p></p><p class=MsoPlainText><a href="mailto:FreeSWITCH-users@lists.freeswitch.org"><span style='color:windowtext;text-decoration:none'>FreeSWITCH-users@lists.freeswitch.org</span></a><o:p></o:p></p><p class=MsoPlainText><a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users"><span style='color:windowtext;text-decoration:none'>http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</span></a><o:p></o:p></p><p class=MsoPlainText>UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users<o:p></o:p></p><p class=MsoPlainText><a href="http://www.freeswitch.org"><span style='color:windowtext;text-decoration:none'>http://www.freeswitch.org</span></a><o:p></o:p></p></div></body></html>