DSL

DSL (pronounced: /ˈdiː.ɛs.ɛl/), or Digital Subscriber Line, is a family of technologies that provide internet access by transmitting digital data over the wires of a local telephone network.

Etymology

The term DSL is an acronym for Digital Subscriber Line. The term was first used in the early 1990s to describe a technology that provides digital data transmission over the existing wires of local telephone networks.

Types of DSL

There are several types of DSL, including:

• Asymmetric Digital Subscriber Line (ADSL) - This is the most commonly installed DSL technology, used for residential internet access.
• Symmetric Digital Subscriber Line (SDSL) - This type of DSL provides equal bandwidth for both upload and download data.
• Very high bit-rate Digital Subscriber Line (VDSL) - This is a DSL technology that provides faster data transmission over a single flat untwisted or twisted pair of copper wires.

Related Terms

• Broadband - A high-capacity transmission technique using a wide range of frequencies, which enables a large number of messages to be communicated simultaneously.
• Internet Service Provider (ISP) - A company that provides individuals and other companies access to the Internet and other related services.
• Modem - A device or program that enables a computer to transmit data over, for example, telephone or cable lines.

See Also

• Internet
• Telecommunication

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