[Asterisk-Dev] zaptel echo preload

[Matthew Fredrickson]

I would assume your running an analog line card.  Have you tried 
running fxotune to make sure your line impedance settings are not 
totally out of whack?  That would be a source of initial acoustic echo. 
  There's also a small (8 tap) canceler on the fxo line interface part 
that could be tweaked for analog line issues such as those you might be 
seeing.  Like Steve said, preloading coefficients is essentially 
useless outside the analog line realm, so I'm not sure if this is the 
right answer.

Matthew Fredrickson

On Jan 14, 2006, at 8:16 PM, James Harper wrote:

> I'm tinkering with a patch to preload echo coefficients at channel
> creation time instead of it starting from scratch each time a call is
> started.
>
> Anyone want to have a look once I have something that works?
>
> Any comments as to if this is a good idea or not? Currently I get quite
> a few seconds of echo before it stabilises, so I think that having
> something preloaded in there is better than starting from zero. Once I
> get it going I'll be able to comment with more authority though :)