What is a local loop?

February 4, 2020

A local loop is the wired connection from a telephone company’s central office. The system was originally designed for voice transmission only using analog transmission technology on a single voice channel. Today, computer modems make the conversion between analog signals and digital signals. With Integrated Services Digital Network (ISDN) or Digital Subscriber Line (DSL), the local loop can carry digital signals directly and at a much higher bandwidth than they do for voice only. Today, local loops may include a digital loop carrier system segment or a fiber optic transmission system referred to as fiber-in-the-loop.)

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