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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Several times a day, while a call is in progress, I get “zaptel
Disabled echo canceller because of tone (rx) on channel X” and echo
cancellation shuts off.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I do use fax detection to route calls to my fax extension.
It seems to have a 100% success rate. I heard a rumor about a patch that would
disable echo cancellation after the first few seconds of the call. Is there
such a thing?<o:p></o:p></span></font></p>
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