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12
DTMF
DTMF (Dual Tone Multi-frequency) is the signaling type that uses 2 different frequency tones simultaneously. DTMF code
can be used as a PTT ID or for initiating an individual call, calling a telephone number while connected to a phone line, and
remote control of the transceiver.
DTMF signaling uses 2 different frequencies combined (one lower and one higher frequency) and consists of the 0 to 9, A
to D, * and # tones.
Following are methods available to send the DTMF code:
•
Autodial (Portable only)
•
Manual Dialing (Mobile only)
•
Keypad Auto PTT (Mobile only)
•
Autodial List Selection (Mobile only)
•
Redial (Mobile only)
•
PTT ID Communications
Note
For NX-240/ 240V/ 340/ 340U/ 740H/ 740HV/ 840H/ 840HU, DTMF can be used only in an Analog Conventional system.
FUNC (K)/Ver 1.20
Table 12-1 DTMF Tone Frequency List
DTMF Code
Low Frequency
0
941 Hz
1
697 Hz
2
697 Hz
3
697 Hz
4
770 Hz
5
770 Hz
6
770 Hz
7
852 Hz
8
852 Hz
9
852 Hz
A
697 Hz
B
770 Hz
C
852 Hz
D
941 Hz
*
941 Hz
#
941 Hz
Frequency
High Frequency
1336 Hz
1209 Hz
1336 Hz
1477 Hz
1209 Hz
1336 Hz
1477 Hz
1209 Hz
1336 Hz
1477 Hz
1633 Hz
1633 Hz
1633 Hz
1633 Hz
1209 Hz
1477 Hz
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