Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!gatech!rutgers!bellcore!texbell!killer!pollux!dalsqnt!usl!usl-pc!jpd
From: jpd@usl-pc.usl.edu (DugalJP)
Newsgroups: sci.electronics
Subject: Re: DTMF (Touch-Tone) --> RS-232 Conversion
Keywords: DTMF, RS-232, Touch-Tone, Please Help!
Message-ID: <177@usl-pc.usl.edu>
Date: 26 Jan 89 17:26:14 GMT
References: <1441@thumper.bellcore.com>
Reply-To: jpd@usl-pc.UUCP (DugalJP)
Organization: Univ. of Southwestern La., Lafayette
Lines: 15


Pete, I recently purchased the Radio Shack DTMF decoder chip.  Looks
very easy to interface.  Although you asked about RS-232 interfacing,
I think it would be easy to interface it to a PC's parallel port.  Phil
Karn posted some time back on rec.ham-radio about how to modify a
parallel IO card for 8-bit input.  I'm not sure a stock card would have
enough input lines .... I think you'd need 5 (4 data plus strobe).

-- James

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