| CTCSS | Carrier Tone Coded Subaudible Squelch 
| Others |
| CTCSS | Continous Tone Coded Squelch System
| Others |
| CTCSS | Continuous Coded Subaudio Squelch
| Others |
| CTCSS | Continuous Tone Code Squelch System
| Others |
| CTCSS | Continuous Tone Coded Selection Or Squelch
| Others |
| CTCSS | Continuous Tone Coded Selective Squelch
| Others |
| CTCSS | Continuous Tone Coded Squelch System
| Others |
| CTCSS | Continuous Tone Controlled Signaling System
| Others |
| CTCSS | Continuous Tone Controlled Squelch System
| Others |
| CTCSS | Continuous Tone-Coded Squelch System
| Others |
| CTCSS | Continus Tone Coded Squelch System
| Others |
| CTCSS | Courtesy Tone Carrier System Signal
| Others |