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cable television systems, office buildings, and other work-sites for local area networks. The cables consist of copper or aluminum wire surrounded by an insulating layer (typically a flexible material with a high dielectric constant), which itself is surrounded by a conductive layer. The insulation between the conductors helps maintain the characteristic impedance of the cable, which can help improve its performance. Transmission speed ranges from 200 million bits per second to more than 500 million bits per second.
*ITU-T

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