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 |
Austria | Negative indication tone | 380+420 | 0.4 on 0.4 off | |
Cuba | Negative indication tone | 425 | 0.5 on 0.5 off | |
Hungary | Negative indication tone | 300+425 | 3x(0.2 on 0.2 off) + announcement | |
Kyrgyz Republic | Negative indication tone | |||
Liechtenstein | Negative indication tone | |||
United Kingdom | Negative indication tone | |||
Uruguay | Negative indication tone |