Enterprise definition

Dark Fiber

Unused fiber strands or fiber pairs reserved for your own equipment, route, and capacity plan.

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What it means

Dark fiber is fiber optic cable that is in place but not carrying an active service until optical equipment is connected. Instead of buying a fixed bandwidth service, you reserve the fiber path and decide how to light it.

Where it fits

  • Long-term private backbone segments
  • Organizations that want control over optics and capacity
  • High-growth routes where 10G today may become 100G or 400G later
  • Private paths to interconnection points, IX ports, carrier meet points, or cloud on-ramps

What we'll talk through with you

  • Which exact endpoints or meet points need to be connected?
  • Do you need one fiber pair, multiple pairs, or route diversity?
  • Who will light the fiber and monitor the optics?
  • Do you need an IRU structure, monthly service, or a blended build model?
  • What restoration, maintenance, and access expectations matter?
Important context Dark fiber gives the most control, but it also moves more responsibility to the customer unless Quad State Internet is operating the optical layer for you.

How it shows up in a real project

A carrier needs a private path from a regional facility to an exchange port. Quad State Internet builds or coordinates the route, provides a fiber pair under an IRU, and can also support the optical turn-up if needed.

Learn the goal

We start by translating the business need into endpoints, capacity, term, resiliency, and support expectations.

Map the meet points

We identify carrier meet points, IX ports, cloud on-ramps, colocation footprints, or private handoffs that matter.

Choose the model

The answer may be DIA, IP Transit, Type II access, dark fiber, wavelength, IRU, managed transport, or a blend.

Build the path

Quad State Internet can build, coordinate, light, monitor, document, and support the route after turn-up.

Related things to learn

IRUs A long-term right to use fiber, route segments, or lit capacity without buying the entire physical asset. Wavelengths High-capacity optical channels, often 10G, 100G, or 400G, delivered over a fiber path. Private Backbone A private network spine that connects your sites, carriers, cloud paths, and interconnection points. Interconnection Points Places where networks meet to exchange traffic, buy transit, reach cloud platforms, or connect private paths.
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