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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|Gibraltar||Busy tone||400||0.375 on 0.375 off|
|Gibraltar||Congestion tone||400||0.4 on 0.35 off 0.225 on 0.525 off|
|Gibraltar||Number unobtainable tone|