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 |
| Tanzania | Acceptance tone | 425 | continuous |  |
| Tanzania | Busy tone - I | 425 | 1.0 on 1.0 off | |
| Tanzania | Busy tone - II | 400 | 0.5 on 0.5 off | |
| Tanzania | Call waiting tone - I | |||
| Tanzania | Call waiting tone - II | |||
| Tanzania | Congestion tone - I | |||
| Tanzania | Congestion tone - II | |||
| Tanzania | Dial tone | |||
| Tanzania | Dial tone | |||
| Tanzania | Intrusion tone | |||
| Tanzania | Pay tone | |||
| Tanzania | Pay tone | |||
| Tanzania | Refusal tone | |||
| Tanzania | Ringing tone - I | |||
| Tanzania | Ringing tone - II | |||
| Tanzania | Special information tone - I | |||
| Tanzania | Special information tone - II | |||
| Tanzania | Test number tone | |||
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