7K • Chapter 4
4-28
DTMF Custom Duration Change Characters
The easiest way to change the duration of the DTMF characters is to use the 2-
digit codes mentioned above. However, you may require other durations, so the
controller allows you to choose a Custom DTMF Duration Change. This
parameter may be set from 10mS to 9900mS (9.9seconds).
• Use the code “50xx,” where xx is a number from 01 to 99, to get durations
from 10mS to 990mS.
• Use the code “51xx,” where xx is a number from 01 to 99 to get durations
from 100mS to 9900mS.
Once you change the duration, it will stay at the new value indefinitely, or until
changed again by another code.
DTMF Gap Change Characters
Every DTMF character sent by the controller is followed by a DTMF Gap, or
silent period. You may wish to change the duration of the DTMF characters
from the default duration of 100mS. Ten of the most common durations are
shown in the DTMF Gap Change Characters Table. 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 in the table, go to the custom DTMF gap
change description immediately below. Once you change the duration, it will
stay at the new value indefinitely, or until changed again by another code.
The following table shows DTMF Gap Change Characters:
DTMF Gap Change Characters
Control Character 9950
DTMF Gap Change Code
20mS 30
30mS 31
40mS 32
50mS 33
60mS 34
70mS 35
80mS 36
90mS 37
100mS 38
150mS 39
DTMF Custom Gap Change Characters
The easiest way to change the duration of the gap is to use the 2-digit codes
mentioned above. However, you may require other gap durations, so the
controller allows you to choose a Custom DTMF Gap Change. Duration of the
gap may be set from 10mS to 9900mS (9.9seconds).
• Use the code “52xx,” where xx is a number from 01 to 99, to get durations
from 10mS to 990mS.
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