[Asterisk-Users] Local Echo

[Andrew Kohlsmith]

On April 12, 2005 07:21 pm, Matt Fredrickson wrote:
> 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.

He should also be using ztmonitor and a milliWatt source to make sure his 
gains are optimally set.  Googling for "Adjusting txgain/rxgain 
site:lists.digium.com" and looking for Kris Boutilier's lengthy post.  I 
found you don't need any additional patches, just the telco's milliWatt 
number and some time.

I know you're looking for a quick and easy answer, but there isn't one.  Echo 
is a problem that affects all TDM networks, and affects any packetized 
networks doubly so.

-A.