Re: My own telco card ?

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Frank,

another point you forgot is echo cancellation. What
you send on the line can often be heared as well, so you
need a DSP on the board to eliminate echo. The
DSP is also required for pogress detection and
voice energy detection, I don't think that's an
easy task.

Best regards,

Matthias Moetje
-------------------------------------
TERASENS GmbH
Ackermannstraße 3
80797 München
-------------------------------------
Fon: +49 89 143370-0
Fax: +49 89 143370-22
e-mail: moetje at terasens dot de
www: www.terasens.de
-------------------------------------


"Frank" <ftrigo@xxxxxxxxxxxxxxx> wrote in message
news:e3rVC3LYFHA.4000@xxxxxxxxxxxxxxxxxxxxxxx
> People, i seen a lot of problem with voice and modems, if i tell i can
> factory a telco card some of you buy it?
>
> Build a phone line interfase isn't complex, is more complex decode all the
> signaling, but i worked here building and developing some stand alone
> telephony devices.
>
> In a few words how much money cost for you a telcocard with this features:
>
> - Give to you all the call progress event and full control of the line
> (Dial, pick-up a call, busy line, line fault, and others..)
> - DTMF generation and decoding
> - hand free phone device possible w/dialer and some other like open only
> speaker only mic or open both.
> - A wave port, to connect the wave telco port of you soundcard. No a wave
> device!
> - Voice energy detection.
> - No Fax, No modem support, only analog.
>
> Best Regards
> Frank
>
>


.

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