[Asterisk-Users] Local Echo

[Noah Silverman]

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
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users at lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
>