The Computer Dictionary

SDSL
Symmetric Digital Subscriber Line

For a perspective of all forms of DSL, see DSL.

SDSL is a form of DSL, which is a family of technologies that provide digital data transmission over the wires of a local telephone network, a means of connecting computers to the Internet. SDSL is the same as HDSL but requires only one line and has a transfer rate of up to 3 Mbps in both directions. It is popular primarily in Europe.

SDSL uses high-frequency pulses and cannot be used simultaneously with voice over the same wires. SDSL requires its own SDSL modem.

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