A Modulator-Demodulator is a device that converts computer digital data signals into electrical signals capable of long distance transmission over transmission links and also converts back the electrical signal into the digital format for the computer. It generally modulates an analog carrier wave with a digital signal and demodulates the same. A modem generally modulates the signal according to standards set in CCITT V.34 but also support other common protocols. Their speeds are measured in bits per second (bps) or baud rate (symbols per second).
Filed Under: What Is