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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|Hong Kong||Busy tone||480+620||0.5 on 0.5 off|
|Hong Kong||Congestion tone||480+620||0.25 on 0.25 off|
|Hong Kong||Dial tone||350+440||continuous|
|Hong Kong||Disconnect tone|
|Hong Kong||Number unobtainable tone|
|Hong Kong||Ringing tone|