| 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 |