Article View: sci.electronics
Article #698Re: Touchtones
From: John Sparks
Date: Wed, 28 Jun 1989 12:20
Date: Wed, 28 Jun 1989 12:20
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[I asked for a list of the touch tone frequencies]
[ I promised to summarize for the net ]
Thanks to Brian Link and Ronald Buttiglieri for the table below:
697 Hz [1] [2] [3] [A]
770 Hz [4] [5] [6] [B]
low group
frequencies 852 Hz [7] [8] [9] [C]
941 Hz [*] [0] [#] [D]
1209 1336 1477 1633
Hz Hz Hz Hz
high group frequencies
Touch-tones are two frequencies sounded together for each button pressed.
For example [1] will sound 697hz and 1209hz.
[A]-[D] are part of the touchtone standard but are presently unused.
Thanks for the help guys.
--
John Sparks | {rutgers|uunet}!ukma!corpane!sparks | D.I.S.K. 24hrs 1200bps
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pacbell!att!mcdchg!ddsw1!corpane!sparks From: sparks@corpane.UUCP (John Sparks) Newsgroups: sci.electronics Subject: Re: Touchtones Message-ID: <860@corpane.UUCP> Date: 28 Jun 89 12:20:48 GMT Organization: Corpane Industries Inc., Louisville, KY Lines: 32