ZETRON 748, Техническое руководство

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Feature Set Reference
120 025-9368H
DTMF On Time - DTMF Off Time
These two commands control the duty-cycle of the DTMF tones during selective calling. Both
Selcall formats DTMF and DTMF-t use this timing when sending tones.
The DTMF on time sets the duration on the tone in ten millisecond increments. The DTMF off time
sets the duration between the tones in ten millisecond increments. By varying the two times, you can
customize the duty-cycle for the decoders used on the system. If the decoder can see a valid tone
after 40 milliseconds, you could set the on time for 50 milliseconds. If the decoder can see a valid
break in 20 milliseconds, you could set the off time for 30 milliseconds. The net result is 80
milliseconds per digit instead of 100 milliseconds per digit (50% duty-cycle).
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 ,
and the Interconnect Menu will appear. Type “1” and press ENTER , the Mobile System Menu will
be displayed. Select the item number for DTMF on time or DTMF off time and press
ENTER
.
The current timing value will be shown along with a message showing the range of data that can be
entered. Enter the new value and press
ENTER
.
The default setting for both DTMF on time and DTMF off time is five (50 milliseconds).
Note that this only affects DTMF selective calling on the channel. It does not affect or change
DTMF regenerated into the phone lines.