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 |
| Swaziland | Busy tone - I | 400 | 0.5 on 0.5 off |  |
| Swaziland | Busy tone - II | 400 | 0.4 on 0.4 off | |
| Swaziland | Dial tone | 400x50 | continuous | |
| Swaziland | Number unobtainable tone | |||
| Swaziland | Pay tone | |||
| Swaziland | Payphone recognition tone - I | |||
| Swaziland | Payphone recognition tone - II | |||
| Swaziland | Ringing tone | |||
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