dark fibre
Let an agent explain what dark fibre is and how it differs from lit services, relay contract, technical and regulatory considerations in general terms, and separate dark fibre from wavelength services, duct access and unused capacity in general.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
What What dark fibre is.
Definition
Definition.
Definition
Definition.
- What is dark fibre, and how does it differ from lit services? definition
- Is the question about dark fibre, a wavelength service or duct access? boundary
Use
Who uses it.
Use
Use.
- Who buys dark fibre and for what purposes? provenance
- Which entry fits optical networking? action
Technical Fibre parameters.
Parameters
Parameters.
Parameters
Parameters.
- Which fibre parameters matter, and how are they measured and specified? measurement
- Which standards define them? provenance
Lighting
Lighting the fibre.
Lighting
Lighting.
- What equipment and expertise does lighting dark fibre require? provenance
- Which entry fits optical transceivers? action
Commercial Contracts and regulation.
Contracts
Leases and IRUs.
Contracts
Contracts.
- How are dark fibre leases and IRUs structured, in general terms? provenance
- Is the user asking for contract advice, which needs a professional? boundary
Regulation
Access regulation.
Regulation
Regulation.
- Where do regulators mandate dark fibre access, and on what terms? provenance
- Which entry fits telecommunications regulation? action
Context Market and history.
Market
Market.
Market
Market.
- How is the dark fibre market organised, with figures and sources? measurement
- Which sources are cited? provenance
History
History.
History
History.
- How did dark fibre emerge from overbuilding and become a product? provenance
- Which references are standard? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Cross-cutting context
- Entry kind
- thing
- Plane
- XCT
- Domain
- XCT.QTY
- Other names and narrower kinds
- managed dark fiber
What it is Filled
Optical fibre that has been installed but is not lit by the owner, leased or sold to a customer who connects their own transmission equipment at both ends; dark fibre gives the customer full control of capacity and technology and is used by carriers, data centres, enterprises, research networks and public bodies.
Why it exists Filled
Let an agent explain what dark fibre is and how it differs from lit services, relay contract, technical and regulatory considerations in general terms, and separate dark fibre from wavelength services, duct access and unused capacity in general.
Distinguishing features Filled
- Unlit by the owner
- Customer controls capacity and technology
- Sold by pair or strand, often as long-term rights
- Requires customer equipment and expertise
What robots and AI may and may not do Filled
Must not
- Light, tap or connect to dark fibre the agent's principal does not own or lease.
- Disclose the routes of fibre that carry critical traffic beyond those who need them.
- Dig or work near buried fibre without checking the utility records.
- Misstate fibre condition or loss to win or keep a lease.
Only with a human decision
- Signing, ending or transferring a fibre lease.
- Cutting or rerouting fibre during repair work.
May
- Report the route, length and characteristics of dark fibre for its owner or lessee.
- Match a fibre's characteristics with the equipment the customer plans to light it with.
Moral aspects Filled
- Fibre routes are critical infrastructure; their exposure can help those who want to disrupt them.
- Access to dark fibre affects which carriers can compete and which areas get service.
Who is affected
- Lessees and their customers
- Owners of the network
- Communities that depend on the route
Owners Filled
Steward
The network owner who installed it and the customer who leases it under contract.
Master systems
- Utility and network asset records
Links to other meta-models Filled
parent
- Q11869795 - registry parent class
related
- telecommunications capacity - a form of connectivity
- optical fibre - the physical medium
- wavelength service - a lit service
- telecommunications regulator - access rules in some markets
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.dark-fibre
- Wikidata: Q1878571 (https://www.wikidata.org/wiki/Q1878571)
Direct properties not applicable Not applicable
- attenuation: about 0.2-0.4 dB per km - single-mode at common wavelengths
- lease term: 1-20 years - IRUs at the long end
Plane XCT: no invented physical properties.
Recognition optional Filled
- Fibre leased or sold without equipment
- Customer lights it with own transceivers
- Managed wavelength and Ethernet services are lit by the provider
- Not distinguishable by eye; fibre strands in cables and ducts without transmission equipment attached.
Capabilities and actions required Filled
- explain dark fibre and its use
- compare it with lit and wavelength services
- relay technical parameters and contract terms in general terms
- relay regulatory access rules where they exist
Hazards and failure modes required Filled
- Fibre cuts and repair responsibility disputes
- Mismatch between fibre characteristics and equipment
- Stranded assets after technology change
Standards and interfaces required Filled
- ITU-T fibre standards such as G.652
- Regulatory access obligations on dominant operators in some markets
- Contract terms for IRUs and leases
Context of use required Filled
- Private optical connectivity under the customer control.
- leased dark fibre pairs
- indefeasible rights of use
- managed dark fibre with maintenance included
- metro, long-haul and submarine dark fibre
- regulated dark fibre access products
Sources Filled
- Wikidata item Q1878571: dark fibre - identity and sense of the item
- Wikipedia: Dark fibre - general description of the item
Open questions
- Should IRUs be a separate entry?
- How should regulatory access products be linked by country?
- How should fibre parameters be represented?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1878571/spec.json