[Asterisk-Users] Local Echo

[Bashir Ullah - www.Lamsre.Com]

hi

i did not find fxotune under zapte-1.0.6 , please let me know is it
different module , need to install seperate, please show me the way , i am
having same echo problem and finding its solution for mt tdm fxo.

thanks.
bashir
----- Original Message ----- 
From: "Noah Silverman" <noah at allresearch.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users at lists.digium.com>
Sent: Tuesday, April 12, 2005 5:43 PM
Subject: Re: [Asterisk-Users] Local Echo


> Great suggestion.  I'll try it ASAP.
>
> Where do I get fxotune?
>
> Thanks!
>
> -N
>
>
>
> Matt Fredrickson wrote:
> > On Tue, Apr 12, 2005 at 10:16:16AM -0700, Noah Silverman wrote:
> >
> >>I have a strange echo problem.
> >>
> >>When speaking on the phone with someone, I hear MY OWN voice with a
> >>sever echo.  The other party sounds perfect, and they can hear me
> >>perfectly.  It is as if only the sidetone has an echo.
> >>
> >>I'm running * on a dedicated box, small LAN, and am using 4 FXO cards to
> >> connect the box to PTSN lines.  My phones are Polycom IP500 SIP phones.
> >>
> >>The only echo cancellation stuff that I can find relates to cancelling
> >>echo between my system and the PTSN lines.  Since the call is "perfect",
> >>I don't see how this would apply.
> >>
> >>Any suggestions??
> >
> >
> > If you're using a TDM card, you might see if the fxotune program will
help.
> >
> > It does impedance tuning of the card and finds the line impedance that
has
> > the lowest mean power (i.e. least echo).  I've been working on it for a
while
> > and some people have had some success with it.
> >
> > Matthew Fredrickson
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