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 |
| Norway | Busy tone | 425 | 0.5 on 0.5 off |  |
| Norway | Call waiting tone | 425 | 0.2 on 0.6 off 0.2 on 10.0 off | |
| Norway | Confirmation tone | 470/425 | 0.4 on 0.4 on + | |
| Norway | Congestion tone | |||
| Norway | Dial tone | |||
| Norway | Intrusion tone | |||
| Norway | Ringing tone | |||
| Norway | Special dial tone | |||
| Norway | Special information tone | |||
| Norway | Warning tone - I | |||
| Norway | Warning tone - II | |||
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