Welcome to the World Tone Database, dedicated to the A-Z of international call progress tones. From here you can research tone parameters in national tone plans and hear the tones on-line.
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| Country | Tone | Frequency/Hz | Cadence/s | Audio |
| Liechtenstein | Busy tone - I | 425 | 0.3 on 0.3 off |  |
| Liechtenstein | Busy tone - II | 420 | 0.4 on 0.4 off | |
| Liechtenstein | Busy tone - III | 400 | 0.36 on 0.36 off | |
| Liechtenstein | Busy tone - IV | |||
| Liechtenstein | Call waiting tone - I | |||
| Liechtenstein | Call waiting tone - II | |||
| Liechtenstein | Call waiting tone - III | |||
| Liechtenstein | Congestion tone | |||
| Liechtenstein | Congestion tone | |||
| Liechtenstein | Dial tone | |||
| Liechtenstein | Negative indication tone | |||
| Liechtenstein | Number unobtainable tone | |||
| Liechtenstein | Pay tone - I | |||
| Liechtenstein | Pay tone - II | |||
| Liechtenstein | Pay tone - III | |||
| Liechtenstein | Positive indication tone | |||
| Liechtenstein | Recall dial tone | |||
| Liechtenstein | Ringing tone - I | |||
| Liechtenstein | Ringing tone - II | |||
| Liechtenstein | Ringing tone - III | |||
| Liechtenstein | Ringing tone - III | |||
| Liechtenstein | Special dial tone | |||
| Liechtenstein | Special information tone | |||
| Liechtenstein | Warning tone | |||
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