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MultiModemBA User Guide
Appendix C - Dial Pulse and Tone-Dial Frequencies
Dial Pulses
Closed
Open
B
A
Digit 2 Digit 1
In the example above, the digit 2 is pulse dialed, followed by the digit 1. Each pulse consists of an A
mSec. open and a B mSec. closed, where A will be either 60 or 67 mSec and B will be either 40 or 33
mSec., for a total of 100 mSec. per pulse, or a rate of 10 pulses per second. The interdigital pause
time is 800 mSec. The pulse ratios are controlled by the &P command.
Tone Dial Frequencies
Hz Digits
697
770
852
941
Hz 1209 1336 1477 1633
1 2 3 A
4 5 6 B
7 8 9 C
0 # D
*