[asterisk-users] Zapata/DAHDI Disable Hardware echo canceler based on SDA number / displan

[Kevin P. Fleming]

Benoit Plessis wrote:
> Is it possible on a TE220p to deactivate the hardware echo canceler at 
> will ? (With a function in the dialpan for example)
> example for fax SDA ,beeing able to shutdown the echo canceler could 
> give better results don't you think ?

All echo cancelers using Zaptel/DAHDI already disable themselves when
FAX or modem communications are used, based on reception and detection
of the CED tone that FAX machines and modems generate to make that
happen. You can tell this happened by looking at the channel in Asterisk
using 'zap show channel' or 'dahdi show channel' as it will show you
that the echo canceler was disabled automatically.

-- 
Kevin P. Fleming
Director of Software Technologies
Digium, Inc. - "The Genuine Asterisk Experience" (TM)