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dark fiber

   Also found in: Wikipedia 0.04 sec.

dark fiber

(1) Also known as "unlit fiber," it is optical fiber that is laid in the ground, but not used. During the late 1990s, so much fiber had been installed worldwide in anticipation of Internet demand that there is still a huge amount of fiber that has never been lit. The projected demand has also been curbed by the improvements in WDM technology, which allows more channels to be transmitted in a single fiber strand. Contrast with lit fiber.

(2) Optical fibers that are installed and sold to carriers and large businesses without any optical or electronic signaling in their path. The customer is responsible for adding the transmission system at both ends. See TONS.



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Through the strategic alliance, Cushman & Wakefield will negotiate arrangements that allow for the interconnection of AFS's dark fiber (fiber-optic cable without electronics equipment attached) with the equipment of other telecommunications companies.
With today's announcement, comprehensive, high-quality professional services from Fujitsu are also available to help Internet2 members manage their dark fiber assets and optical networking solutions in every stage of their network life cycle, from planning and deployment to critical on-going maintenance.
Working with a dark fiber provider to engineer and deploy mid-span amplification sites can be costly and complex, however, with SpanExpress, these costs and complexities are eliminated.
 
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