A medium made of translucent fibers with appropriate interfaces for transmitting analog and digital signals. Light is used to represent the signals. The original signals are recovered to recreate the electronic signals at the far end of the fiber. The optical fiber system provides high electrical isolation between transmitter and receiver, as well as immunity to electromagnetic and static interference. The signal loss in a fiber optics system is usually smaller than in coax cables, and so optic fibers are often used to carry signals over very long distances (tens and hundreds of kilometers.)
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