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value indefinitely, or until changed again by another code.
G. Gap Change
Every DTMF character sent by the controller is followed by a "gap", or silent period. You
may wish to change the duration of this gap from the default value of 100 ms. Ten of the
most common gap durations are shown on the DTMF Character Set chart. If you wish to
change the gap to one of the values shown, enter the two-digit code corresponding to your
choice. If the gap you want is not on the chart, then go to the "Custom Gap Change"
description below. Once you change the gap duration, it will stay at the new value
indefinitely, or until changed again by another code.
H. Custom Gap Change
The easiest way to change the duration of the gap is to use the 2-digit codes mentioned in
part (G) above. However, you may require other gap durations, so the controller allows you
to choose a custom gap duration. Duration may be set from 10 ms to 9900 ms (0.01 to 9.9
seconds). Use the code "52xx," where "xx" is a number from 01 to 99, to get gaps from 10
ms to 990 ms. Use the code "53xx" where "xx" is a number from 01 to 99, to get gaps from
100 ms to 9900 ms. Once you change the gap duration, it will stay at the new value
indefinitely, or until changed again by another code.
NOTE: If you intend to program a large number of DTMF pages with varying tone durations
and gap durations, it would be a good idea to set up the proper duration values at the
beginning of each individual page. Otherwise, the old values from the previous page will be
used for the new page.
I. Pause
Unlike a "gap", which is automatically sent after each DTMF character, a "pause" may be
inserted anywhere in a DTMF page. Pauses are typically used to separate individual pages
within a multi-page message.
Ten common pause durations are shown on the DTMF Character Set chart. If you wish to
insert a pause into a page, enter the two-digit code corresponding to your choice. If the
pause you want is not on the chart, then go to the "Custom Pause" description below.
J. Custom Pause
The easiest way to insert a pause is to use the 2-digit codes mentioned in part (I) above.
However, you may require other pauses, so the controller allows you to choose a custom
pause. Duration may be set from 10 ms to 9900 ms (0.01 to 9.9 seconds). Use the code
"54xx", where "xx" is a number from 01 to 99, to get pauses from 10 ms to 990 ms. Use the
code "55xx", where "xx" is a number from 01 to 99, to get pauses from 100 ms to 9900 ms.
NOTE: Since each DTMF character is followed by a gap, be sure to add the gap duration to
the pause duration if you want an accurate idea of the time between two DTMF pages.
NOTE: Pauses are "additive": A long pause may be created by placing a series of pauses
together within a DTMF page.
