I have had problems between the sip/FXO lies and was able to "kill" the
echo by trying different combinations of the echocancel line to 64 (I
think it has settings in 32 bit increments)<br>
Just kept trying different ones till it went away. Here is my config:<br>
<br>
group=1<br>
context=line1<br>
signalling=fxs_ks<br>
usecallerid=yes<br>
callerid=asreceived<br>
echocancel=64<br>
echocancelwhenbridged=yes<br>
callgroup=1<br>
rxgain=1.2<br>
channel => 1<br>
<br>
context=line2<br>
signalling=fxs_ks<br>
usecallerid=yes<br>
callerid=asreceived<br>
echocancel=64<br>
echocancelwhenbridged=yes<br>
callgroup=1<br>
rxgain=1.2<br>
channel => 2<br>
musiconhold=default<br>
context=line3<br>
signalling=fxs_ks<br>
usecallerid=yes<br>
callerid=asreceived<br>
echocancel=64<br>
echocancelwhenbridged=yes<br>
callgroup=1<br>
rxgain=1.2<br>
channel => 3<br>
<br>
group=2<br>
context=line4<br>
signalling=fxs_ks<br>
usecallerid=yes<br>
callerid=asreceived<br>
echocancel=96<br>
echocancelwhenbridged=yes<br>
callgroup=2<br>
channel => 4<br>
<br>
Hope this helps!<br>
<br>
t o n y<br><br><div><span class="gmail_quote">On 9/28/05, <b class="gmail_sendername">Shaw Terwilliger</b> <<a href="mailto:sterwill@sourcegear.com">sterwill@sourcegear.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I'm using Asterisk 1.0.9, a Digium TE210P dual T1 card, and two Rhino<br>channel banks (one 12FXO/12FXS, the other 24 FXS). So it's an analog<br>phone on the inside connected to one of the FXS ports, and PSTN line<br>connected to one of the FXO ports.
<br><br>My problem is that as soon as I hear the _first_ ring when I dial out<br>through the PSTN line, I hear a tiny echo on the phone (I estimate<br>between 20ms and 40ms), which never goes away for this call. It's just
<br>loud enough to bug the heck out of me when I'm talking (I could estimate<br>the gain relationship with ztmonitor if it would help). The sound<br>on the recipient end of the connection is perfect.<br><br>If I make a call from the phone to the another internal extension (another
<br>phone on an FXS port), there is no echo. If I call into Comedian mail,<br>there is no echo.<br><br>I've checked all my gains. The "internal" gains were a bit loud to start<br>with because of the powered phones, but now they all fall comfortably within
<br>ztmonitor's dynamic range display. The PSTN line is pretty good at tx 0 and<br>rx 0, so I left it. I've tried turning them down, but that didn't kill<br>the echo.<br><br>My zapata.conf includes these lines at the bottom:
<br><br>echocancel=yes<br>echocancelwhenbridged=no<br>echotraining=yes<br><br>context=companyA-pstn<br>txgain=0.0<br>rxgain=0.0<br>signalling=fxs_ks<br>group=1<br>channel=1-7<br><br>context=companyB-pstn<br>txgain=0.0<br>
rxgain=0.0<br>signalling=fxs_ks<br>group=2<br>channel=11-12<br><br>context=internal<br>txgain=-12.0<br>rxgain=-8.0<br>signalling=fxo_ls<br>callerid=asreceived<br>group=3<br>channel=13-48<br><br>When the calls are connected, I can use "zap show channel 11" and verify
<br>that the echo cancellation is ON. But I can still hear one.<br>I've also tried echocancelwhenbridged=yes, but it didn't make any difference.<br><br>--<br>Shaw Terwilliger <<a href="mailto:sterwill@sourcegear.com">
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