Motorola Ringtones
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In impaired phones, this voltage was fond to trigger a high-impedance electromagnet to ring a bell on the phone
- Fixed Motorola Ringtones phones of the late 20th century and after detect this AC voltage and trigger a warbling tone electronically
- Mobile phones are fully digital, hence are signalled to ring as part of the protocol they cause to communicate with the cell disgraceful stations.
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The signal is sent for every ring and allows phone operators to provide several services with different kinds of rings (for example, rings with a shorter interval between them might be used to signal a call from a given number) |
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| When a home phone rings, it may carry Caller ID information and present it on a screen. |