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10.
DTMF PAGE
A. Control Character
The Control Character 9950 should be entered before the actual DTMF character codes
when building a DTMF Page message. If a message does not begin with a Control
Character, the Message Handler will assume that the message should be sent in CW!
B. Format
Enter the Control Character 9950. Then enter the various DTMF character codes described
in the "DTMF Character Set" to create the desired message/page. You may end the DTMF
message with the * character, or you may enter another Control Character (99xx) and
continue with another message type.
C. Delays
A 1-second pre-page delay is created by the Message Handler for the first page in a group.
If additional pages follow, the pre-page delay is eliminated in succeeding pages.
A 1-second post-page delay is created by the Message Handler for all DTMF pages.
If desired, a DTMF page can consist of several DTMF digits, a pause, more DTMF digits,
another pause, and so on. This feature allows you to place a series of DTMF pages within
one message.
D. DTMF Characters
There are 16 DTMF characters: Numerals 0 through 9, letters A through D, and the symbols
"*" and "#". Each character has a two-digit code, shown on the DTMF Character Set chart.
Enter the appropriate two-digit code for each DTMF character that you wish to send.
E. Duration Change
You may wish to change the duration of the DTMF characters from the default duration of
100 ms. Ten of the most common durations are shown on the DTMF Character Set chart. If
you wish to change the duration to one of the values shown, enter the two-digit code
corresponding to your choice. If the duration you want is not on the chart, then go to the
"Custom Duration Change" description below. Once you change the duration, it will stay at
the new value indefinitely, or until changed again by another code.
F. Custom Duration Change
The easiest way to change the duration of the DTMF characters is to use the 2-digit codes
mentioned in part (E) above. However, you may require other durations, so the controller
allows you to choose a custom duration. Duration may be set from 10 ms to 9900 ms (0.01
to 9.9 seconds). Use the code "50xx" where "xx" is a number from 01 to 99 to get durations
from 10 ms to 990 ms. Use the code "51xx" where xx is a number from 01 to 99 to get
durations from 100 ms to 9900 ms. Once you change the duration, it will stay at the new
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