MODEM stands for Modulator-Demodulator. Computers use digital (binary) signals, while traditional telephone lines transmit analog signals. A modem converts the digital signals from a computer into analog signals that can travel over telephone lines (modulation) and converts the analog signals received back into digital signals that the computer can understand (demodulation).
The device by which data are transferred by telephone with the help of binary signals, is
Asked in UPPSC Upper Mains 2007 · Topic: Data Communication and Transmission Modes (Analog and Digital Transmission)
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