Dtmf Signalling - Icom IC-FR3000 Series Sales Handbook

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What is DTMF? What is DTMF? What is DTMF? What is DTMF?
DTMF (dual tone multi frequency) is the sounds used for
touch tone dialing.
Each number and character (0 to 9, A, B, C, D. E (*), and
F (#)) is represented by a pair of tones.
The following table shows the DTFM frequencies and the
corresponding number and characters.
Frequency/Number, Character Matrix Table
1209
697
Low
770
Frequency
852
(Hz)
941 * (E)
Two Pure Sine Waves combine for form the DTMF Tone
+ + + +
Low Frequency High Frequency
Sine Wave
DTMF Features DTMF Features DTMF Features DTMF Features
1. Autodial (20 numbers) is available for Emergency
(LMR), Log/ID (LMR), Alert and TEL Autodial are
used for Emergency call.
2. It is possible to setup LCD Blinking indicators,
variable audible signals and beeps to activate when
receiving matched RX code.
3. This repeater automatically responds a System
Password OK ACK, System Control Exit ACK, OK ACK,
and NG ACK when receiving a matched DTMF code.
4. "Stun/Kill – This function allows the dispatch
console to disable temporarily or permanently a unit
using the DTMF capabilities. When "Stun" is used,
the unit may regain its functionality by entering a
password. When Kill is used, the radio only regains
functionality by reprogramming the unit using the
cloning software.
5. The repeater functionality provides the programmer
with RX Text identifiers. When a matched DTMF
code is received, a repeater will display the pre-
programmed text.
6. The System Control function allows control of the
repeater from a remote location over the air or over
a phone line with DTMF.

DTMF Signalling

High Frequency (Hz)
1336 1477
1 2 3
4 5 6
7 8 9
0 # (F)
= = = =
DTMF Tone
Sine Wave
System Control
The System Control function is ON when a matched
DTMF code is received.
▒ NOTE NOTE NOTE: A different code from the header tone must be NOTE
▒ set. The de-limiter tone is also combined with the
▒ system control command.
▒ The de-limiter tone is used to end a command, as well
▒ as for a sub command for a system command to be
▒ received.
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► ► ► ► Example Example ◄ ◄ ◄ ◄ Example Example
A
Header tone: A
De-limiter tone: #
B
System command: 1234
C
Sub command: 01
Total remote control code; A1234#01#
D
RX System Code
For programming DTMF codes of 4 digits in the
following items.
The item activates when receiving a matched DTMF
code.
Input code 0000 (or OFF)
To turn OFF the item: To turn OFF the item:
However, "System Password" cannot be set to OFF.
("0000" is recognized as a code.)
0001 System Password
0002 System Control Exit - Exits the system control mode.
0003 Repeat Start
0004 Repeat Stop
0005 TX Start
0006 TX Stop
0007 RF Power (Low)
0008 RF Power (High)
0009 RX Unit OFF
0010 RX Unit ON
0011 RX/TX Unit OFF
0012 RX/TX Unit ON
0013 Master Enable
0014 Slave Enable
0015 TEL Dial
0016 TEL Autodial
0017 Mch Select
0018 CPU All Reset
TX System Code
Program DTMF codes for response of 4 digits in the
following items.
1111 System Password OK ACK
2020 System control Exit ACK
3333 OK ACK
4040 NG ACK
- Moves to system control mode.
- Starts the Repeater operation.
- Stops the Repeater operation.
- Starts to transmit.
- Stops to transmit.
- Transmits by low power.
- Transmits by low power.
- Turns the RX unit OFF.
- Turns the RX unit ON.
- Turns the RX and TX unit OFF.
- Turns the RX and TX unit ON.
- Enables the Master of the back-
up function.
- Enables the Slave (sub) of the
back-up function.
- Calls by the transceiver.
- Calls by the speed dialing.
- Changes the memory channel.
- Resets the CPU.
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