A dual-tone multi-frequency (DTMF) system is used to produce signals that represent the dialed digits in a telephone system. A combination of a horizontal frequency and a vertical frequency is produced whenever a button is pressed on the keypad. The figure below shows a telephone keypad and the different frequencies used.

Q: Briefly explain paging

A:

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A: Dear learner, hope you are doing well, I will try my best to answer this question. Thank You!!

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