[Asterisk-Users] Local Echo

[Rich Adamson]

> 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??

Try these parameters for each zap channel:
echotraining=800
echocancel=yes
echocancelwhenbridged=yes

Don't forget you have to stop and restart asterisk. a reload will not work.