[Asterisk-Users] chan_capi-cm-0.5 release announcement

[Klaus-Peter Junghanns]

>  
> > > Yes, that should be possible. But I don't think a channel driver (and each
> > > channel driver) should do that on its own. Software echo cancelling
> > > belongs in a common part of Asterisk.
> > > 
> > > 
> > > 
> > I strongly agree. But asterisk doesn't seem to work this way. Zap channel has
> > it's own echo cancel engine. Other channels don't.
> > This is so sad :-(
> > Why not implement a really common echo cancel api usable from any channel ??
> 
> Exactly!
> I'm not familiar with the Asterisk API, but it could be some
> plugin like res_* ... 
> 
> Maybe this belongs to the Asterisk-Dev list.
> 
> Armin

I strongly disagree. :-) You dont want to do echo cancelation in
userspace. Especially not on a non-realtime operating system.
To make echo cancelation work it has to be as close to the line
interface as possible. Also the frames have to be as small
as possible. This rules out capi pretty much.

best regards

Klaus
--
Klaus-Peter Junghanns