[Asterisk-Users] Echo Problem with T411P

[Steve Davies]

On 6/15/06, Idris AVCI <idris.avci at vodatech.com.tr> wrote:
>
> Hello,
>
> There are 3 PRI's connected to the card each from different operators.
> Especially echo occured on span 3 is really annoying. Configuration files
> are as follows. Is there something wrong in conf ?
>

Have you verified that the provider on span 3 is not using some high
latency routing? The configuration line "context=Satelco" suggests a
satellite company? They should do the echo cancelling on your behalf
if they have high latency routes as the asterisk EC will never keep up
under those circumstances.

We have even experienced problems within Europe where providers route
national calls via international routes to save money. This adds
significant latency and makes any echo so heavily delayed that
asterisk cannot remove it.

Cheers,
Steve