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RING BACK TONES

ring back tones

A ringback tone (RBT), or audible ringing tone or ringback signal, is the audible ringing that is heard on the telephone line by the calling party after dialing and prior to the call being answered at the distant end.

[edit] Ringback tone characteristics

The ringback tone is different in various countries depending on the requirements for the ringback specification in those countries. For example, in the NANP (United States, Canada, and others), the standard ringback signal is generated by summing a 440Hz tone with a 480Hz tone and applying these to the telephone line in a 2 second on and 4 second off cadence. The tone combination produces a warbling "ring. ring. ringtoniacom: Ringback Tones. " sound, caused by the 40Hz beat between the two. Most other countries use a single tone, as do some PBX and key phone systems. In the UK, it is a signature double beep, which has been made famous as is it included at the end on Pink Floyd's "Another Brick in the Wall, Part 2. " The ringback signal may be generated by the called-party servicing switch or by the calling-party switch, but it is not generated by the called telephone instrument. It is generally started and stopped at the same rate as the ringing signal itself but perhaps out of phase. 1000s to Choose From.

Example of a North American ringback tone (file info) — play in browser (beta)Listen to a ringback tone from North America. Problems listening to the file? See media help.

[edit] Personalized ringback tone

In recent years, "personalized" ringback tone has become globally popular. With this feature, callers will hear an audio selection applied to the telephone line that has been previously determined by the called party. Audio selections can include music, messages, and special effects. Find Totally Free Ringtones Here! Choose a realtone or polytone.