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 |
| Ethiopia | Acceptance tone | 425 | continuous |  |
| Ethiopia | Busy tone | 425 | 0.4 on 0.4 off | |
| Ethiopia | Call waiting tone | 425 | 0.2 on 0.6 off | |
| Ethiopia | Congestion tone | |||
| Ethiopia | Dial tone | |||
| Ethiopia | Intrusion tone | |||
| Ethiopia | Line lock-out tone | |||
| Ethiopia | Refusal tone | |||
| Ethiopia | Ringing tone | |||
| Ethiopia | Special dial tone | |||
| Ethiopia | Special information tone | |||
| Ethiopia | Warning tone | |||
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