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A telephone ring is the sound generated when there is an incoming telephone call. The term originated from the fact that telephones originally had a ringing mechanism consisting of bells and an electromagneticallydriven clapper, producing a ringing sound. The aforementioned electrical signal powered the electromagnets which would rapidly move and release the clapper, striking the bells. This electromagnetic bell system is still in widespread use. The ringing signal sent to a customer39;s telephone is 90 volts AC at a frequency of 20 hertz in North America. In Europe it is around 6090 volts AC at a frequency of 25 hertz. Some nonBell system party lines in the US used multiple frequencies to allow quot;selectivequot; ringing.In Australia the ring signal averages 100 V AC at 25 Hz.While the sound produced is still called a ring, morerecently manufactured telephones electronically produce a warbling, chirping, or other sound. Variation of the ring signal can be used to indicate characteristics of incoming calls for example, rings with a shorter interval between them might be used to signal a call from a given number.You can download music for free and make ringtone. Tunee ringtones are made with gtunes music download.

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