dark fiber


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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.
References in periodicals archive ?
Diode Ventures, a global turnkey asset development company, and Tenebris Fiber, a dark fiber provider in Virginia, have agreed to co-develop an approximate 630-mile network from Virginia Beach, VA to Ashburn, VA to offer dark fiber services in Virginia, the companies said.
All of Dark Fiber Systems' colleagues have joined Hargray.
The dark fiber solutions include leasing of multiple long haul dark fiber routes, including fully redundant paths to meet growing diversity requirements.
Dark fiber refers to the unused portion of the fiber-optics in the transmission grid.
The dark fiber will provide Interdata with dedicated, secure infrastructure with the performance and resilience they require, said Annette Murphy, Zayos managing director of Europe.
The route will also be available for 100G wavelengths in addition to dark fiber once completed.
Banks and financial services companies are increasingly turning to dark fiber for their bandwidth-intensive core transport, including file sharing, large file transfers, business intelligence applications and data analysis.
Its solution consist of over 30 dark fiber pairs along completely diverse routes for the data center provider and leverages existing low-latency routes in the New York/New Jersey metropolitan corridor, requiring limited buildout.
Among several proposed ESL changes was a revised description of eligible dark fiber service in Category One to read "Leased Dark Fiber." The change is intended to help explain the distinction between lit fiber, leased dark fiber and self-provisioned fiber under E-rate program rules.
With the recent updates to E-rate, district leaders can choose between building and maintaining their own networks using dark fiber or trusting the job to a communications service provider.
Croft pioneered engineering, tracking and reporting expectations for deliverables for the dark fiber Super Regional Network deployment initiation--a project which began in West Texas moving east to Alabama, Georgia and Florida.
This mirror of Site 1 data has been kept synchronized up until the time of the disaster with Site 1 data by the iSCSI switch at Site 1 performing synchronous mirroring over the dark fiber DWDM connection.