Answer:
MODEM(Modulator Demodulator)
Step-by-step explanation:
A modem is a device used in data communication that allows analog signal to be sent over a telephone line.
The modem works by converting the analog signal into digital data that the computer understands. The digital data is converted back to its original form at the receiver end.
Modem modulates analog signal from a telephone line to digital data the computer can understand. also, at the receiver end, it demodulates the digital data back to its original analog signal.