Modulator-demodulator

A Modulator-Demodulator (or modem) is a device that enables digital devices, like computers, to communicate over analog phone lines or networks. When sending data, the modem converts digital signals into analog signals (modulation) so they can travel over traditional communication lines. When receiving data, it converts the analog signals back into digital form (demodulation) for the computer to understand. Essentially, a modem acts as a translator, allowing digital devices to connect and share information across different types of communication systems efficiently.