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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|Brazil||Busy tone||425||0.25 on 0.25 off|
|Brazil||Dial tone - pabx||425||0.975 on 0.05 off|
|Brazil||Executive override tone|
|Brazil||Function acknowledge tone|
|Brazil||Number unobtainable tone|