DSL, or Digital Subscriber Line, is a family of technologies that transmit digital data over traditional telephone lines [1]. DSL technology enables high-bandwidth Internet connections for homes and businesses without requiring installing expensive new infrastructure. Instead, DSL utilizes unused frequencies on the copper wires already part of the telephone network. This allows DSL to deliver high-speed Internet access over the same lines used for telephone service.

There are a few different types of DSL technology, including ADSL (Asymmetric Digital Subscriber Line), VDSL (Very High-Bit-Rate Digital Subscriber Line), and SHDSL (Single-Pair High-Speed Digital Subscriber Line). Each of these technologies operates at different speeds and uses different frequency ranges within the telephone line to transmit data.

DSL may have lower speeds and be more susceptible to signal degradation over long distances than other broadband technologies, such as cable or fiber-optic Internet. However, DSL is generally cheaper to install and operate, making it a popular choice in areas with limited high-speed Internet access options.

Overall, DSL has played an essential role in developing broadband Internet access, a widely used technology today.

1. Digital subscriber line – Wikipedia


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