A telecommunications line that provides a fast, permanent connection to the Internet. It allows data to transmit at a far greater speed than standard telephone wiring can and can carry both voice and data so you do not need a second phone line. A DSL line is always on so there is no need to connect to the Internet.
A form of high-speed Internet connection. DSL allows you to connect to the Internet without using your telephone line. It does not give you a second line; it merely allows you simultaneously talk on the phone and surf the web.
technologies that allow telephone companies to use conventional phone lines to deliver data at rates far higher than today's traditional modems or even ISDN