Dtmf - Baofeng UV-5RV2+ Operating Manual

DTMF

DTMF stands for Dual-Tone Multi-Frequency. Basically DTMF is an advanced signaling method that uses dual sinusoidal signals
for any given code. A good example of DTMF in use is a touch tone telephone system. In two-way radio systems, DTMF is mainly
used for automation systems and for remote control. For example, DTMF can be used to remotely activate repeaters by
transmitting a specific sequence of numbers.
697 Hz
770 Hz
852 Hz
941 Hz
The Baofeng UV-5R allows for full implementation of DTMF. The numerical and the [SCAN] and [LOCK] buttons correspond to
the matching DTMF tones. The numeric buttons correspond to the same DTMF tones, but to access the A, B, C, & D codes, the
[MENU], [UP], [DOWN], and [EXIT] buttons are used, respectively.
To send DTMF codes, press the buttons corresponding to the message you want to send while holding down the [PTT] button.
See below for the mapping of DTMF tones to the keypad.
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Table: DTMF Frequencies and Corresponding Codes
1209 Hz 1336 Hz
1 2
4 5
7 8
* 0
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1477 Hz
3
6
9
#
A B
1 2
4 5
7 8
1633 Hz
A
B
C
D
C D
3 *
6 0
9 #
27