[asterisk-dev] DTFM question

[Mauricio Henriquez]

Hi:

Dmitry Andrianov wrote:
> While your question meets the "dev" part of "asterisk-dev" mailing list, it definitely has nothing to do with the "asterisk" one.
>
>   
yeap, that is way I say that I'm really lost here...but, "has nothing to 
do with asterix"??, DTMF detection is not a feature in asterix?, to 
build voice menues, etc?, or is something that is supported by the modem HW?

thanks for help...

Mauricio

> http://en.wikipedia.org/wiki/Goertzel_algorithm
> or see the sources of main/dsp.c from the Asterisk...
>
> -----Original Message-----
> From: asterisk-dev-bounces at lists.digium.com [mailto:asterisk-dev-bounces at lists.digium.com] On Behalf Of Mauricio Henriquez
> Sent: Sunday, August 31, 2008 5:03 AM
> To: asterisk-dev at lists.digium.com
> Subject: [asterisk-dev] DTFM question
>
> Hi Guys:
>
> First post to the list, so Hi to all...
>
> I'm really lost here, I run a fedora 8 and I have a external trendnet
> TMF-560X and a couple of internal "linuxant" modems (don't know if can
> be used for what I want..) an I need to do "simple" DTMF detection. I
> post to the dev list becouse I'm a programmer and I need to do this DTMF
> detection from a program, currently from my C and C# (mono/linux) I can
> send AT commands to the modem, but then I'm lost about what is need to
> do to detect DTMF tones like the one used for voice menus, etc.
>
> So, I think that a extermal program is needed to do that like asterix,
> is posible to interact with asterix software to do this task?, and as
> curiosity how that is doit? (I mean a program to do that from zero have
> to "read" the sound from the modem line and run a algorithm to detect
> the DTMF tone? or is more like a HW capability?)..I ask that becouse I
> find a example C program that can capture sound from input line, may ca
> be use to capture data from modem line?..)
>
> Any info is going to be appreciated..
>
> thanks
>
> Mauricio
>
>
>
>
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