[Asterisk-Users] Will Echo problems EVER be solved, I'm scared

[Andrew Kohlsmith]

On Friday 26 August 2005 18:14, Rich Adamson wrote:
> As mentioned in my last private email, all four analog pstn lines attached
> to my TDM04b have been tested with a professional transmission test set
> and all four are in excellent condition. Fxotune did not generate any
> noticable differences to my ear. I'm only mentioning that for those readers
> that might expect something different to happen and don't notice any
> changes/improvements on US pstn lines.

Can you elaborate on the specific issues you're having?  It's nice to be able 
to talk to someone who's got experience in telco and also computing (and CTI 
too) to get to the heart of some of these issues.

Specifically, have you tried the KB1 echo canceller?  What about enabling MMX 
(if you're on intel), enabling/uncommenting the CALC_XLAW #define and 
compiling zaptel with 

KFLAGS+=-march=pentium4 (or whatever) and
CFLAGS+=-march=pentium4 (or whatever)

in your zaptel Makefile just underneath the comments regarding everything 
being done in zconfig.h.

I'm *really* interested in hearing what your findings are.

-A.