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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The only echo I’ve ever fixed was by changing load on the device….despite chasing my tail on everything else…then trying a new load<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b>On Behalf Of </b>Wes Sisk<br><b>Sent:</b> Tuesday, August 31, 2010 3:00 PM<br><b>To:</b> Jeff Ruttman<br><b>Cc:</b> Cisco VOIP<br><b>Subject:</b> Re: [cisco-voip] Echo Cancellation and 7911 Phone Loads<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Talker echo is usually caused by echo at far end tail circuit. With VOIP that delay is going to be too long for the talker's phone to cancel. It will have to canceled closer to the source of the echo.<br><br>Otherwise, AFAIK, all cisco phones (except soft) have local ecan to prevent speaker audio from going back into mic.<br><br><br><a href="http://www.voiptroubleshooter.com/problems/echo.html">http://www.voiptroubleshooter.com/problems/echo.html</a><br><a href="http://www.cisco.com/en/US/partner/docs/ios/solutions_docs/voip_solutions/EA_ISD.html">http://www.cisco.com/en/US/partner/docs/ios/solutions_docs/voip_solutions/EA_ISD.html</a><br><a href="http://www.cisco.com/en/US/partner/tech/tk652/tk698/technologies_tech_note09186a0080149a1f.shtml">http://www.cisco.com/en/US/partner/tech/tk652/tk698/technologies_tech_note09186a0080149a1f.shtml</a><br><br>/Wes<br><br>Jeff Ruttman wrote: <o:p></o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Greetings,</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Can someone confirm or deny my memory? I recall reading that phone loads for 7911 phones don't really contain echo cancellation programming. In looking now, I can't find much info on echo cancellation in relation to different phone models/loads in general and nothing on 7911s.</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>We have an office mostly full of 7911s recently complaining of talker echo. There are loads out on cisco.com newer than the ones we're using, and while it's not hard to change phone loads, it would be pointless to do it if the phone loads don't contain echo cancellation.</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Any insight?</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>jeff</span><o:p></o:p></p></div><pre><o:p> </o:p></pre><pre style='text-align:center'><hr size=4 width="90%" align=center></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>cisco-voip mailing list<o:p></o:p></pre><pre><a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><o:p></o:p></pre><pre><a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</a><o:p></o:p></pre><pre> <o:p></o:p></pre></div></body></html>
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