Icom IC-FR3000 Series, Sales Handbook

Page: 50 / 74

3-10 DTMF Signalling
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.
High Frequency (Hz)
1209 1336 1477 1633
Low
Frequency
(Hz)
697 1 2 3 A
770 4 5 6 B
852 7 8 9 C
941 * (E) 0 # (F) D
Two Pure Sine Waves combine for form the DTMF Tone
Frequency/Number, Character Matrix Table
System Control
The System Control function is ON when a matched
DTMF code is received.
▒ NOTE NOTE NOTE NOTE: A different code from the header tone must be
▒ 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.
►►►► Example Example Example Example ◄◄◄◄
Header tone: A
De-limiter tone: #
System command: 1234
Sub command: 01
Total remote control code; A1234#01#
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:
+ ++ + = == =
50
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.
To turn OFF the item:
However, "System Password" cannot be set to OFF.
("0000" is recognized as a code.)
0001 System Password - Moves to system control mode.
0002 System Control Exit - Exits the system control mode.
0003 Repeat Start
- Starts the Repeater operation.
0004 Repeat Stop - Stops the Repeater operation.
0005 TX Start - Starts to transmit.
0006 TX Stop - Stops to transmit.
0007 RF Power (Low) - Transmits by low power.
0008 RF Power (High) - Transmits by low power.
0009 RX Unit OFF - Turns the RX unit OFF.
0010 RX Unit ON - Turns the RX unit ON.
0011 RX/TX Unit OFF - Turns the RX and TX unit OFF.
0012 RX/TX Unit ON - Turns the RX and TX unit ON.
0013 Master Enable - Enables the Master of the back-
up function.
0014 Slave Enable - Enables the Slave (sub) of the
back-up function.
0015 TEL Dial - Calls by the transceiver.
0016 TEL Autodial - Calls by the speed dialing.
0017 Mch Select - Changes the memory channel.
0018 CPU All Reset - Resets the CPU.
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
Low Frequency
Sine Wave
High Frequency
Sine Wave
DTMF Tone