[asterisk-speech-rec] DTMF

[Joshua Colp]

David Brazier wrote:
>   Hi
>  
> I find that I'm not getting reliable results trying to detect DTMF using
> Lumenvox SRE via Asterisk.  In fact, I don't know if it really recognises
> DTMF at all - sometimes it just happens to match against the voice grammar -
> e.g. a beep is matched against spoken "yes".  My application uses code 
> like:

Using the newest version of the speech API once a DTMF digit is received 
then Asterisk will stop doing speech recognition and switch strictly to 
DTMF in itself. Once this happens the SRE is no longer involved as it is 
not the one who detects or handles the DTMF. If everything is properly 
setup then DTMF tones should never reach the SRE. In the case where 
you've got DTMF going inband and you're not setup to process it inband, 
then it would spill over to the engine but that's the only case I can 
think of.

Joshua Colp
Software Developer
Digium, Inc.