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.
Business customers subscribing to our paid premium service can benefit from unrestricted searching of over 1,700 records, update notifications and support, for up to ten users, ad-free.
Help us improve! If you have updated information on Disconnect tones or official versions of national tone plans, please let us know.
|Trinidad & Tobago||Busy tone||480+620||0.5 on 0.5 off|
|Trinidad & Tobago||Congestion tone - I||480+620||0.3 on 0.2 off|
|Trinidad & Tobago||Congestion tone - II, trunk||480+620||0.2 on 0.3 off|
|Trinidad & Tobago||Dial tone|
|Trinidad & Tobago||Ringing tone|
|Trinidad & Tobago||Waiting tone|