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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| Country | Tone | Frequency/Hz | Cadence/s | Audio |
| Brunei Darussalam | Busy tone | 400 | 0.375 on 0.375 off |  |
| Brunei Darussalam | Call waiting tone | 400x24 | 0.5 on 0.25 off | |
| Brunei Darussalam | Confirmation tone | 400x24 | 0.1 on 0.1 off 0.3 on 0.3 off | |
| Brunei Darussalam | Congestion tone | |||
| Brunei Darussalam | Dial tone | |||
| Brunei Darussalam | Holding tone | |||
| Brunei Darussalam | Number unobtainable tone | |||
| Brunei Darussalam | Ringing tone | |||
| Brunei Darussalam | Special dial tone | |||
| Brunei Darussalam | Waiting tone | |||
| Brunei Darussalam | Warning tone - end of period | |||
| Brunei Darussalam | Warning tone - operator intervening | |||
| Brunei Darussalam | Warning tone - pip tone | |||
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