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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|Bangladesh||Busy tone||450||0.2 on 0.3 off 0.7 on 0.8 off|
|Bangladesh||Call waiting tone||450||3.0 on 10.0 off|
|Bangladesh||Congestion tone||450||0.25 on 0.25 off|
|Bangladesh||Special dial tone|
|Bangladesh||Warning tone - operator intervening|