Radio Shack TRS-80 Modem II - Page 33

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Rotary Dialing
Number
Number Number Number
being dialed of pulses
being dialed of pulses
1 1 6 6
2
2 7 7
3 3
8
8
4
4
9
9
5 5 10
Fast
rotary dialing: 20
pulses per second.
0.4-second pause
after each number.
Slow rotary dialing: 10 pulses per second.
0.8-second pause after each number.
Example
235-8214
Fast rotary dialing
Number of pulses:
2 + 3 + 5 + 8 + 2+1+4
=
25 pulses
Dialing time: 25 pulses / 20 pulses per
second
=
1 .25 second
Pauses: 0.4 seconds X 7 numbers
=
2.8 seconds
Remember to add 2 seconds for
each P command!
Total time: 1.25 seconds + 2.8 seconds
=
4.05 seconds
Slow
rotary dialing
Number
of
pulses: 2 + 3 + 5 + 8 + 2+1+4
=
25 pulses
Dialing time: 25 pulses
/ 10
pulses per second
=
2.5
seconds.
Pauses: 0.8 seconds X 7 numbers
=
5.6 seconds
Total time: 2.5 seconds + 5.6 seconds
=
8.1 seconds
Tone Dialing
Tone
dialing: 10 characters per second
Example
235-8214
7 characters / 10 characters per second
=
.7
seconds
Remember
to add 2 seconds for each P
command!
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