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Re: [Discuss-gnuradio] Modem and/or ADSL Daughter card

From: Lamar Owen
Subject: Re: [Discuss-gnuradio] Modem and/or ADSL Daughter card
Date: Thu, 4 May 2006 16:48:47 -0400
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On Thursday 04 May 2006 14:01, Michael Milner wrote:
> It shouldn't be too difficult to design a daughter board for the USRP to
> sample phone line voltage (with an appropriate line interface circuit of
> course).  After that it should be rather easy in GNURadio to generate DTMF
> tones for dialing, and modem tones for data communication.

> Any thoughts?

Yeah, just one: 47 CFR Part 68.  As in FCC regulations on items that can be 
connected to the PSTN.  A part 68 interface card that could be used to 
provide an interface to an LFRX/LFTX pair would be ideal.

Marcus can elaborate, being that he is employed in that field.
Lamar Owen
Director of Information Technology
Pisgah Astronomical Research Institute
1 PARI Drive
Rosman, NC  28772

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