🚀 go-pugleaf

In article <1991Jan9.102713.10815@bernina.ethz.ch>, 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.
> 

Standard dialtone in North America is 350 plus 440 Hz.

You didn't want the frequencies for standard Dual Tone Multifrequency
tone dials, did you?

Here is the scheme:


          1209hz        1336hz       1477hz

697hz       1             2            3

770hz       4             5            6

852hz       7             8            9

941hz       *             0            #


When dialing a digit one, you get 1209+697 hz.  A digit will put out
the tones for the row and column that it is in.

There is also a fourth column at 1633 hz available, but I am assuming
that this is not for military autovon networks!

Levels should be about -9 to -6dbm (275 to 388 mv) across the line,
with about the levels about the same, or the high frequency a db or two
hotter.


Tad Cook
Seattle, WA
Packet: KT7H @ N7HFZ.WA.USA.NA
Phone: 206/527-4089 
MCI Mail: 3288544 
Telex: 6503288544 MCI UW  
USENET:...uw-beaver!sumax!amc-gw!ssc!tad
or, tad@ssc.UUCP