Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!rutgers!cbmvax!adam
From: adam@cbmcats.UUCP (Adam Keith Levin)
Newsgroups: sci.electronics
Subject: Re: DTMF tones
Message-ID: <13427@cbmvax.commodore.com>
Date: 25 Jul 90 16:54:18 GMT
References: <44900010@uxa.cso.uiuc.edu> <44900011@uxa.cso.uiuc.edu> <1202@gold.GVG.TEK.COM> <1990Jul25.125339.1665@focsys.uucp>
Sender: news@cbmvax.commodore.com
Reply-To: adam@cbmcats.UUCP (Adam Keith Levin)
Organization: Commodore Business Machines, Tech Support
Lines: 18

In article <1990Jul25.125339.1665@focsys.uucp> brad@focsys.UUCP (Brad McCloy) writes:
>
>  I also came across some undocumented but supposedly valid tones.
>Anyone have an idea or care to guess what they do?
>Fo = 697Hz & 1633Hz
>F  = 770Hz & 1633Hz
>I  = 852Hz & 1633Hz
>P  = 941Hz & 1633Hz
>
>watmath!focsys!brad

Those are "A", "B", "C", and "D".  Valid touchtones,
just not usually found on telephones.


Adam Keith Levin  --  CATS     Commodore Applications and Technical Support
1200 Wilson Drive / West Chester, PA  19380                  (215) 431-9180
BIX: aklevin             UUCP: ...{amiga|rutgers|uunet}!cbmvax!cbmcats!adam