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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|Macao||Busy tone||425||0.5 on 0.5 off|
|Macao||Call waiting tone||425||0.2 on 0.6 off|
|Macao||Congestion tone||425||0.25 on 0.25 off|
|Macao||Payphone recognition tone|
|Macao||Special dial tone|
|Macao||Special information tone|