Table 12 DTMF Frequencies
Signal
Low frequency
High frequency
0
941
1336
1
697
1209
2
697
1336
3
697
1477
4
770
1209
5
770
1336
6
770
1447
7
852
1209
8
852
1336
9
852
1447
*
941
1209
#
941
1447
A
697
1633
B
770
1633
C
852
1633
D
941
1633
Reference Manual
Index
40-400-00045, Rev.
B
Page 53