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Definition: VDSL was developed to support exceptionally high-bandwidth applications such as High-Definition Television (HDTV). VDSL is not as widely deployed as other forms of DSL service. However, VDSL can achieve data rates up to approximately 51,840 Kbps, making it the fastest available form of DSL.

 VDSL - Related Terms
• SDSL  

To perform at this speed, VDSL relies on fiber optic cabling. VDSL is designed to work more as a business service that uses ATM internetworking rather than as a consumer service that utilizes IP. VDSL supports both voice and data communication on the same line, like other forms of DSL.

Also like most DSL technology, the performance of VDSL depends significantly on the physical distance traversed by wires: Shorter distances mean faster networking. The technology was originally named VADSL ('A' for asymmetric), but VDSL has now been improved and can operate in either symmetric and asymmetric modes.

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Also Known As: Very-high-speed Digital Subscriber Line, VADSL, BDSL

Related Resources:

DSL Tutorial
Multi-part article discusses the nuts and bolts of VDSL and other DSL technology, service availability, and more.

DSL Directory
Index of the best online resources for DSL including VDSL.

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