RF Technology R50
Page 23
APPENDIX A
EIA CTCSS TONE FREQUENCIES
Frequency
EIA Number
No Tone
67.0
A1
71.9
B1
74.4
C1
77.0
A2
79.7
C2
82.5
B2
85.4
C3
88.5
A3
91.5
C4
94.8
B3
100.0
A4
103.5
B4
107.2
A5
110.9
B5
114.8
A6
118.8
B6
123.0
A7
127.3
B7
131.8
A8
136.5
B8
141.3
A9
146.2
B9
151.4
A10
156.7
B10
162.2
A11
167.9
B11
173.8
A12
179.9
B12
186.2
A13
192.8
B13
203.5
A14
210.7
B14
218.1
A15
225.7
B15
233.6
A16
241.8
B16
250.3
A17
