> For the complete documentation index, see [llms.txt](https://docs.glesys.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.glesys.com/products/connectivity/network-services/dark-fiber.md).

# Dark Fiber

Dark or unlit fiber refers to a spare piece of network fiber located underground. Our company provides service by leasing dark fiber from our vendors and reselling it.