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From: tomb@hplsla.HP.COM (Tom Bruhns)
Newsgroups: sci.electronics
Subject: Re: Phone Dial Tones
Message-ID: <5170099@hplsla.HP.COM>
Date: 10 Jan 91 20:51:16 GMT
References: <1991Jan9.102713.10815@bernina.ethz.ch>
Organization: HP Lake Stevens, WA
Lines: 16

hb9zz@bernina.ethz.ch (Marco Zollinger) writes:
>I'm devlopping a little databank program for the atari st and need the frequecy
>of the dial tones and eventually the waveform.

There'll probably be lots of replies, but:

        | 1209 | 1336 | 1477 | 1633 |      where the integers are the
-------------------------------------      frequencies in Hertz. 
 697    |  "1" |  "2" |  "3" |  "A" |      Normally one of the two
-------------------------------------      (the high tone? from my
 770    |  "4" |  "5" |  "6" |  "B" |      poor memory) is a bit
-------------------------------------      "hotter" than the other,
 852    |  "7" |  "8" |  "9" |  "C" |      by perhaps a dB.  I'm
-------------------------------------      sure someone will set us
 941    |  "*" |  "0" |  "#" |  "D" |      straight on this if it's
-------------------------------------      wrong ;-)