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13. DTMF Table
Dual Tone Multi-Frequency (DTMF) Table
High-Group
Frequencies
1209 Hz
1336 Hz
1477 Hz
1633 Hz
697 Hz
1
ABC
2
DEF
3
A
770 Hz
GHI
4
JKL
5
MNO
6
B
852 Hz
PRS
7
TUV
8
XYZ
9
C
Low-Group
Frequencies
941 Hz
*
OPER
0
#
D
Dual Tone Multi-Frequency, or DTMF is a method for instructing a telephone switching system of the
telephone number to be dialed. The DTMF dialing system was developed by AT&T in the 1960s and
was deployed within the AT&T telephone network as a way for customers to direct calls using in-band
signaling. This was marketed by AT&T under the registered trade name Touch-Tone®.
The DTMF system uses eight different frequency signals transmitted in pairs to represent sixteen
different numbers, symbols and letters. This table shows how the frequencies are organized
.
The
frequencies used were chosen to prevent any harmonics from being incorrectly detected by the receiver
as some other DTMF frequency. The transmitter of a DTMF signal simultaneously sends one frequency
from the high-group and one freqency from the low-group. This pair of signals represents the digit or
symbol shown at the intersection of row and column in the table. For example, sending 1209Hz and
770Hz indicates that the "4" digit is being sent.
Summary of Contents for TH-F6A
Page 1: ......
Page 2: ......
Page 3: ......
Page 4: ......
Page 5: ...Kenwood TH F6A TH F7E Protocol Specification Version 1 4 ...
Page 7: ...5 ...
Page 10: ...9 1 APO Table val Time 0 Off 1 30 min 2 60 min ...
Page 11: ...10 2 Balance Table val A Band B Band 0 100 0 1 75 25 2 50 50 3 25 75 4 0 100 ...
Page 14: ...13 5 Band Switch Table val A B 0 A 1 B ...
Page 16: ...15 7 Battery Type Table val Type 0 Lithium 1 Alkaline ...
Page 17: ...16 8 Busy Table stat State 0 Not busy 1 Busy ...
Page 18: ...17 9 Call Key Table val Time 0 Call 1 1750 Hz ...
Page 25: ...24 16 DTMF Speed val Speed 0 Slow 1 Fast ...
Page 26: ...25 17 Dual Mode Table val Mode 0 Single 1 Dual ...
Page 27: ...26 18 Fine Tuning Step Size Table val Step Size 0 33 Hz 1 100 Hz 2 500 Hz 3 1000 Hz ...
Page 30: ...29 21 Ham Band Table band Ham Band 0 2m 1 1 25m 2 70cm ...
Page 31: ...30 22 ID Table id TH F6 TH F7 ...
Page 32: ...31 23 Language Table lang Language 0 English 1 Japanese Katakana ...
Page 33: ...32 24 Lock Table val State 0 Unlocked 1 Locked ...
Page 34: ...33 25 Logic Table val State 0 Off 1 On ...
Page 37: ...36 28 Memory Recall Table val Method 0 All bands 1 Current band ...
Page 38: ...37 29 Modulation Mode Table mode Modulation 0 FM 1 WFM 2 AM 3 LSB 4 USB 5 CW ...
Page 39: ...38 30 Name Frequency Mode Table val Mode 0 Name 1 Frequency ...
Page 40: ...39 31 Packet Speed Table val Speed 0 1200 bps 1 9600 bps ...
Page 41: ...40 32 Power Level Table pwr Output 0 H 1 L 2 EL ...
Page 43: ...42 34 Scan Resume Table val Method 0 Time 1 Carrier 2 Seek ...
Page 44: ...43 35 Serial Port Parameters Table Name Value speed 9600 Baud bits 8 parity none stop bits 1 ...
Page 46: ...45 37 State Table val State 0 Disabled 1 Enabled ...
Page 48: ...47 39 System Reset Table Number Step Size 0 No 1 VFO 2 Menu 3 Full ...
Page 50: ...49 41 VFO Mode Table mode Mode 0 VFO 1 MR 2 CALL ...
Page 53: ...52 Commands ...
Page 125: ...124 Splash Screen ...
Page 126: ...125 Memory Screen ...
Page 127: ...126 Menu1 Screen ...
Page 128: ...127 Menu2 Screen ...
Page 129: ...128 Memory Channel Entry Screen ...
Page 130: ...129 VFO Entry Screen ...
Page 131: ...130 Call Channel Entry Screen ...
Page 132: ...131 DTMF Entry Screen ...
Page 133: ...132 Hardware Interface for Macintosh ...
Page 155: ...154 ...
Page 157: ...156 Notes ...