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.
Summary of Contents for 748
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Page 110: ...Programming 96 025 9368H Notes...
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Page 219: ...Repair 025 9368H 205 MODEL 7XX AUDIO BLOCK DIAGRAM 006 0077A...
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Page 230: ...Repair 216 025 9368H MODEL 7XX CONTROL BOARD 702 9793D Silkscreen...
Page 233: ...Repair 025 9368H 219 MODEL 7XX SINGLE E E CARD 008 9794A Schematic...
Page 234: ...Repair 220 025 9368H MODEL 7XX SINGLE E E CARD 702 9794A Silkscreen...
Page 236: ...Repair 222 025 9368H MODEL 4XB VOICE CARD 008 9236F Schematic...
Page 237: ...Repair 025 9368H 223 MODEL 4XB VOICE CARD 702 9236F Silkscreen...
Page 239: ...Repair 025 9368H 225 MODEL 4XB DIAL CLICK BOARD 008 9242E Schematic...
Page 240: ...Repair 226 025 9368H MODEL 4XB DIAL CLICK BOARD 702 9242E Silkscreen...
Page 254: ...Quick Reference 240 025 9368H Notes...
Page 258: ...Specifications 244 025 9368H...
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