[asterisk-users] Echo cancellation on DAHDI

[Brian]

On Tue, 2010-03-02 at 09:22 -0300, Vinícius Fontes wrote:
> ----- "DHAVAL INDRODIYA" <dhaval.it01034 at gmail.com> escreveu:
> 
> > Dear All,
> > 
> > How can we know the On board supports echo cancellation
> > 
> > I have Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V (rev
> > 02) board
> > 
> > all working fine but sometimes i got echo when user are calling a PRI.
> > 
> > is there any way to know on board echo cancellation .
> > 
> > 
> > regards
> > 
> > Dhaval
> 
> Do you have an echo cancelling module attached to that board? If so, all you need is to set echocancel=yes and echocancelwhenbridged=no on your chan_dahdi.conf. If you don't... well you should!
> 
> Anyway, you can turn on the echocancelling via software with echocancel=256. I strongly recommend using OSLEC in that case. You'll need to patch your DAHDI in order to use it, but it's totally worth it.
> 
On the subject of DAHDI -v- OSLEC.

I never had any luck getting it to work with DAHDI 2.2.1 despite
following:

http://www.rowetel.com/ucasterisk/oslec.html#install_dahdi

All I ever go was a bad case of the blues :-(

make[3]: *** No rule to make target
`/usr/src/dahdi/linux/drivers/dahdi/echo.c', needed by
`/usr/src/dahdi/linux/drivers/dahdi/echo.o'.

I guess I missed something somewhere???