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| dark fiber (optical fiber infrastructure (cabling and repeaters) that is currently in place but is not being used; optical fiber conveys information in the form of light pulses so the "dark" means no light pulses are being sent) | |||
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| dark fiber (optical fiber infrastructure (cabling and repeaters) that is currently in place but is not being used; optical fiber conveys information in the form of light pulses so the "dark" means no light pulses are being sent) | |||