A dedicated line is a communication link used exclusively for a specific purpose, such as connecting a fax machine or modem, or providing a permanent connection to the Internet.
A temporary connection between computers established by dialing a telephone number through a modem. This contrasts with a dedicated channel that provides a continuous connection.
A modem is a device that links computer systems via telephone lines, enabling computers in different locations to exchange information. It is short for modulator-demodulator. Modems convert telephone impulses to computer-interpretable impulses, requiring a modem at each end of the communication link to send or receive converted impulses.
