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Continous Tone Control Squelch System
EIA Code Freq in Hz
  33.0*
  35.4*
  36.6*
  37.9*
  39.6*
  44.4*
  47.5*
  49.2*
  51.2*
  53.0*
  54.9*
  56.8*
  58.8*
  63.0*
XZ 67.0
WZ 69.3
  69.4*
XA 71.9
WA 74.4
XB 77.0
WB 79.7
YZ 82.5
YA 85.4
YB 88.5
ZZ 91.5
ZA 94.8
ZB 97.4*
1Z 100.0
1A 103.5
1B 107.2
2Z 110.9
2A 114.8
2B 118.5
3Z 123.0
3A 127.3
3B 131.8
4Z 136.5
4A 141.3
4B 146.2
5Z 151.4
5A 156.7
  159.8*
5B 162.2
  165.5*
6Z 167.9
  171.3*
6A 173.8
  177.3*
6B 179.9
  183.5*
7Z 186.2
  189.9*
7A 192.8
  196.6*
  199.5*
M1 203.5
8Z 206.5*
M2 210.7
M3 218.1
M4 225.7
9Z 229.1*
M5 233.6
M6 241.8
M7 250.3
0Z 254.1
* Non EIA Standard Tones