<html><body bgcolor="#FFFFFF"><div><br>You should also get your t1 carrier to provide echo cans on the circuit. Fairly common and easy for them to set up.<br>John Chastain<div><br></div><div><br></div><div><br></div></div><div><br>On Sep 4, 2009, at 3:07 PM, Steve Totaro <<a href="mailto:stotaro@asteriskhelpdesk.com">stotaro@asteriskhelpdesk.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><br><br><div class="gmail_quote">2009/9/4 Vinícius Fontes <span dir="ltr"><<a href="mailto:vinicius@canall.com.br"><a href="mailto:vinicius@canall.com.br">vinicius@canall.com.br</a></a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
No it's not a fact of life. VoIP works as fine as conventional telephony once it's correctly set up.<br>
<br>
Try echocancel=256 instead of echocancel=yes and also run fxotune (check the man page). If that all fails, install OSLEC. It's an excellent free software echo canceller, that works much better than Asterisk's default MG2.<br>
<br>
<br>
<br>
Vinícius Fontes<br>
<a href="http://www.asteriskforum.com.br" target="_blank"><a href="http://www.asteriskforum.com.br">www.asteriskforum.com.br</a></a> - Informações e discussão sobre Asterisk e telefonia IP<br>
<br>
----- "Jason Baker" <<a href="mailto:jbaker@glastender.com"><a href="mailto:jbaker@glastender.com">jbaker@glastender.com</a></a>> escreveu:<br>
<div class="im"><br>
> Well I tried Doug's suggestion and the echo is now better, but when I<br>
> call an outside analog line I still get some echo. I can hear my voice<br>
> in the ear piece of the phone with a slight delay. Is this just a fact<br>
> of life with VoIP, or is there a better way to reduce line echo?<br>
><br>
</div><div><div></div><div class="h5">> Again, for reference, I am using the VPMADT032 echo cancellation<br>
> module attached to a Digium TE121 PCI express card. The incoming phone<br>
> service is a PRI.<br>
><br>
><br>
><br>
> Jason Baker<br>
> IT Coordinator Glastender, Inc.<br>
> 5400 North Michigan Road<br>
> Saginaw, Michigan 48604 USA<br>
> Phone: 989.752.4275 ext. 228<br>
> Fax: 989.752.4276<br>
> <a href="http://www.glastender.com" target="_blank"><a href="http://www.glastender.com">www.glastender.com</a></a><br>
><br>
> Doug Lytle wrote:<br>
><br>
> Jason Baker wrote:<br>
><br>
> language = en<br>
><br>
> group = 1<br>
> echocancel = yes<br>
> echotraining = yes<br>
> signalling = pri_cpe<br>
> switchtype = 4ess<br>
> usecallerid = yes<br>
> context = incoming<br>
> channel => 1-23 Just noted that your system is out of Saginaw. The<br>
> system below is out<br>
> of Livonia, with an AT&T PRI as well. Note the rx/txgain entries, it<br>
> may be useful as well:<br>
><br>
><br>
> switchtype=national<br>
> context=pri<br>
> signalling=pri_cpe<br>
> echocancel=yes<br>
> echotraining=yes<br>
> echocancelwhenbridged=yes<br>
> rxgain=-1.0<br>
> txgain=-4.0<br>
</div></div><div><div></div><br clear="all"></div></blockquote><div><br>Just curious. Have you tried turning off all echo can? I RARELY need echo can on T-1. <br><br>I was also under the impression that rx/tx gain was only for POTS lines.<br>
</div></div><br>-- <br>Thanks,<br>Steve Totaro <br>+12409381212 (Cell)<br>+12024369784 (Skype)<br>
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