asterisk users - Apr 2005 - Echo cancelling with Adit 600

Do anyone have experience with echo cancelling on Adit 600?
My Adit 600 consist of 5*8 FXS cards and 1 CMG Router using MGCP to Asterisk.
I've turned on Echo Cancelling with 64ms as longest delay (that's
maximum).
But there still are great echo with delay when dialing through the telco
(through an E1 and EuroISDN).

Any advice will be appriciated!

Thanks!
--
Daniel

On Fri, 22 Apr 2005, Daniel Nystr?m wrote:
> Do anyone have experience with echo cancelling on Adit 600?
> My Adit 600 consist of 5*8 FXS cards and 1 CMG Router using MGCP to
Asterisk.
> I've turned on Echo Cancelling with 64ms as longest delay (that's
maximum).
>
> But there still are great echo with delay when dialing through the telco
> (through an E1 and EuroISDN).
I suspect a channel bank normally only cancels the echo on the extension
side. To handle echo on a voip link you would need an echo canceler with
several times longer span.

You can try to reduce the size of any jitterbuffer in the Adit. That may 
make the echo latency lowe enough.

Peter