[Asterisk-Users] Strange echo phenomenon (double tandem)

[asterisk at anime.net]

On Wed, 1 Feb 2006, Rich Adamson wrote:
> The echo canceller (EC) on the 488 is rather limited and the call paths
> for incoming vs outgoing calls are on the edge of the canceller. The
> EC training algorithum might also be a little different for incoming
> vs outgoing calls.

If its anything like the SPA-3000 then the EC is extremely limited.
SPA is G.165 EC with 8ms tail.

> The only basis for that guess is my playing around with a new 488 running
> the latest available firmware on a pstn line that is known to have a
> long echo tail. It fails miserably and can't be used on this pstn line
> at all.

Still looking for an FXO which doesnt have sucky EC...

-Dan