Dark Fiber Connectivity

Direct answer

Dark fiber is unlit fiber dedicated to a customer, giving the customer control of the optical equipment, capacity plan and upgrade path while also creating operating responsibility.

When dark fiber fits

Dark fiber can fit high-capacity, stable routes where control and growth justify optical equipment, maintenance, sparing and technical ownership. It is not automatically the best option for every distance or bandwidth level.

Understand total responsibility

The customer typically selects and operates optics, manages capacity, monitors performance and plans repairs or vendor support. Compare that responsibility with a carrier-managed wavelength or Ethernet service.

Verify the physical route

Document endpoints, fiber path, building entrances, splice points, maintenance terms and known shared-risk areas. Diverse pairs should be evaluated as physical routes, not only separate contract line items.