What is a Modem?
A modem is a device that converts digital signals from a computer into analog signals that can be transmitted over the telephone. The modem can connect two remote computers using a telephone line, so that they can exchange information with each other. The modem is one of the most widespread methods for the interconnection of computers for its simplicity and low cost.
The modem is a popular access method to the Internet. The information handled by the computer is digital, it is composed of a set of two values: 0 and 1.
To send digital information between computers using telephone lines, a process of transforming information is needed. During this process, the information is adapted to be carried by the communication channel. This process is known as modulation and demodulation, and it is carried out using a modem.