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Quick Reference
025-9368H
229
DTMF-t SIGNALING
DTMF-t is an form of DTMF signaling that is compatible with most older forms of scan based
DTMF trunking. Both the Collect and Reset digits and timing are programmable in the Model 748.
The Reset digit and the timings for both are system wide settings. The Collect digit is part of the
Selcall capcode (the first digit of the capcode) when using this format. The default settings for this
format are:
DTMF-t Reset time:
1000msecs
DTMF-t Collect time:
2500msecs
DTMF-t Reset digit:
A
If a mobile has an decoder address of 1234, and the system is using a Collect digit of “D”, the Selcall
capcode would be “D1234”. Here is an example page using DTMF-t as the format, and D1234 as the
Selcall capcode.
phone-to-mobile call placed to our example user:
A
D
D
1
2
3
4
mobile-to-mobile call placed to our example user:
D
D
1
2
3
4
On disconnect, the Reset digit will be sent to “reset” all the decoders on the channel. The Reset digit
will be sent also if the user receives a phone-to-mobile call, on disconnect of the call.
conversation
A
Summary of Contents for 748
Page 2: ......
Page 68: ...Operation 54 025 9368H Notes...
Page 110: ...Programming 96 025 9368H Notes...
Page 216: ...Feature Set Reference 202 025 9368H Notes...
Page 219: ...Repair 025 9368H 205 MODEL 7XX AUDIO BLOCK DIAGRAM 006 0077A...
Page 225: ...Repair 025 9368H 211 MODEL 7XX CONTROL BOARD 008 9793D Schematic Sheet 1 of 5...
Page 226: ...Repair 212 025 9368H MODEL 7XX CONTROL BOARD SCHEMATIC 008 9793D Sheet 2 of 5...
Page 227: ...Repair 025 9368H 213 MODEL 7XX CONTROL BOARD SCHEMATIC 008 9793D Sheet 3 of 5...
Page 228: ...Repair 214 025 9368H MODEL 7XX CONTROL BOARD SCHEMATIC 008 9793D Sheet 4 of 5...
Page 229: ...Repair 025 9368H 215 MODEL 7XX CONTROL BOARD SCHEMATIC 008 9793D Sheet 5 of 5...
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...
Page 259: ...Specifications 025 9368H 245...