= Modem is used to establish an Internet connection using a standard telephone line. It is an electronic device used to convert digital signal into analog and vice versa. Basically, a modem is used for transmitting and receiving data over a communication channel, such as twisted-pair telephone lines, coaxial cables, and optical fibers.
Modem has two parts – (a) Modulator and
(b) Demodulator.
a) Modulator: It converts digital signal into analog.
b) Demodulator: It converts analog signal onto digital.
It is also I/O device because it convert input signal into digital and output signal into analog. There are two types of modem in used, (a) Internal modem and
(b) External modem.
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