Fiber optic cables are long, thin strands of pure glass bundled together that transmit light signals over long distances. These light signals are similar to the electronic signals that travel over copper wires. These light signals originate from a transmitter that transform electronic signals to light. The light travels along the strands of glass over the length of the cable. If the distance is too great between ends, an optical regenerator boosts the light signal. An optical receiver at the other end receives the light signals. Once the optical receiver receives the light signals, a Fiber Termination Unit (FTU) will decode the light signals into signals that the electronic devices can understand.
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