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 |
Mexico | Busy tone | 425 | 0.25 on 0.25 off | |
Mexico | Congestion tone | 425 | 0.25 on 0.25 off | |
Mexico | Dial tone | 425 | continuous | |
Mexico | Disconnect tone | |||
Mexico | Ringing tone | |||
Mexico | Warning tone - operator intervening |