Appendix B Specifications
73
`DTMF Tone Frequency
Low Group Frequency (Hz)
697
770
852
941
1209
1
4
7
*
1336
2
5
8
0
1477
3
6
9
#
High Group
Frequency (Hz)
1633
A
B
C
D
*Specification and features subjects to change without notice.
