DSL

A proven technology that takes advantage of standard copper telephone lines to provide secure, reliable, high-speed Internet access. This is a general term for any local network loop that is digital in nature.

ADSL

ADSL modems attach to twisted pair copper wiring. ADSL is often provisioned with greater downstream than upstream rates (hence "asymmetric"). These rates are dependent on the distance a user is from the central office and may vary from as high as 9 Mbps to as low as 384 Kbps.

SDSL

Symmetric DSL transmits at the same download speeds and upload speeds.

VDSL

The newest of the DSL technologies, VDSL can offer speeds up to 25 Mbps downstream and 3 Mbps upstream. Similar to SDSL, the gain in speed can be achieved only at short distances. These maximum speeds can be achieved only up to 1,000 feet. Sometimes also called broadband digital subscriber line (BDSL).

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