[asterisk-dev] hardware DTMF

[Kevin P. Fleming]

On 07/29/2010 06:24 AM, marek cervenka wrote:
> Hello,
> 
> in these days digium/sangoma cards have hardware DTMF detection in 
> HWEC(echo cancelation) module
> 
> i'm checked main/dsp.c and include/asterisk/dsp.h and i can't find how 
> this is activated

You're looking in the wrong place... the software DSP in Asterisk isn't
aware of hardware DSPs, because it isn't used when there is a hardware
DSP available :-)

Look for the references to 'hardwaredtmf' in chan_dahdi.c.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org