ZETRON 748, Technical Manual

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Feature Set Reference
124 025-9368H
DTMF Interdigit Time
There are three instances where the DTMF interdigit time has an effect:
1) When a mobile is dialing a telephone number.
2) When either a mobile or a telephone caller is overdialing a User number or ANI to call a mobile.
3) During a hookflash initiated regenerate period.
The reason for the DTMF interdigit time is to leave a path for the Model 748 to take in the event the
user quits entering digits during telephone dialing or during ANI or user number overdial.
Each time a new digit is pressed, the DTMF timeout timer is reset. The DTMF timeout timer sets the
minimum speed that the digits must be entered. It is not the time to enter all of the digits, just the
maximum amount of time between digits that is allowed without the call being terminated.
To help keep the DTMF interdigit time as short as practical, the time allowed for the first digit is
twice this value. Most people have a tendency to delay that first digit relative to the remaining digits
in the sequence. This can be due to searching for a physical item with the number on it, to just a
momentary lapse of memory as to which number to dial.
Example:
The default value is 4 seconds, the time allowed for the first digit would be 8 seconds, then 4
seconds for every following digit.
How to program it:
Access the Model 748 through your direct connected PC or terminal, or remotely from your PC
connected to a modem via the Model 748's internal modem.
Once connected to the Model 748 and the Main Menu is on the screen, type “1” and press ENTER ,
the Interconnect menu will be displayed. Type “1” and press
ENTER
, the Mobile System Menu will
be displayed. Select the correct item for DTMF interdigit time and press ENTER . The current DTMF
interdigit time will appear along with a message instructing you to enter the new value and the range
of values you may enter. Enter the new time and press
ENTER
when you have finished.
The default for the DTMF timeout is 4 seconds and may be programmed anywhere from 2 to 10
seconds.