xDSL

An x Digital Subscriber Line is a line installed between the subscriber's terminal and the telecommunications network switch which supports one of the high bandwidth digital signal transmission technologies of the order of several megabits per second on cables normally used for analogue telephone systems.

There are several technologies that xDSL may refer to, making it possible to achieve high data rates on ordinary telephone lines. Each technology can be identified by decoding the letter(s) replacing the x in front of DSL: ADSL, HDSL, SDSL, RADSL, VDSL, etc.