Dark fibre

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

A dark fibre or unlit fibre is an unused optical fibre, available for use in fibre-optic communication. Dark fibre may be leased from a network service provider.

Excerpt from the Wikipedia article “Dark fibre”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Stealth Communications, CC BY-SA 4.0, via Wikimedia Commons.