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SERIES II INTELLIGENT DATA/FAX MODEMS
Appendix B - Dial Pulse and Tone-Dial Frequencies
Dial Pulses
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
1697
770
852
941
4
7
*
1209
2
5
8
0
1336
3
6
9
#
1477
A
B
C
D
1633
Hz
Hz
Digits
Closed
A
B
Digit 2 Digit 1
Open