When the connection between two locations becomes central to how a business operates, the design of that connection matters. A data centre may need to replicate systems to a second site. A university may need to link campuses. An enterprise may want more control over the network connecting its offices and infrastructure.
Dark fibre can provide the physical foundation for those connections. Capti can assess routes across Australia and offer two operating models: unlit fibre for customers who manage their own equipment, or a managed connection where Capti supplies and operates the transmission equipment at each end.
The right starting point is the pair of locations you need to connect, the applications the link will carry and how much of the network you want to manage.
What is dark fibre?
Dark fibre is optical fibre supplied without an active transmission service. It is called “dark” because the provider is not lighting that fibre with equipment to carry your data as part of the unlit service.
A dark fibre service gives you an agreed optical path between defined endpoints, commonly a dedicated fibre pair. Active equipment sends and receives light over that path. The equipment, fibre characteristics and route length together determine the transmission design and achievable capacity.
Think of the fibre as the physical connection. The equipment turns it into a working network. Internet access, cloud services and connections inside a data centre are separate components unless they are included in your solution.
Two ways to connect with Capti
Unlit dark fibre: you operate the equipment
Capti arranges the fibre path and agreed hand-off points. Your technical team supplies, configures and operates the optical equipment that lights it.
This gives you control over transmission technology, capacity planning and equipment upgrades. It also gives your team responsibility for equipment monitoring, maintenance, spares and fault diagnosis within its part of the network. The fibre supplier remains responsible for the passive path within the contracted service boundary.
This model suits organisations with the engineering capability to operate the connection, or an appointed specialist to do so.
Capti-managed fibre: we operate the equipment
Capti supplies, configures and manages the transmission equipment at each end, delivering a private connection with an agreed capacity and customer interface.
Your team receives an operational service, with Capti managing the transmission layer within the agreed scope. The proposal defines the monitoring, maintenance, equipment replacement and support arrangements, along with any responsibilities for site access, space and power.
We describe this as a managed private fibre service built on dark fibre. Once the equipment is installed and operating, the connection is lit. Routers, firewalls, internet access and local network management can be discussed separately and should be explicitly included where required.
| What you choose | Unlit dark fibre | Capti-managed fibre |
|---|---|---|
| Transmission equipment | Supplied and operated by your team | Supplied and operated by Capti |
| Day-to-day transmission management | Your team or appointed specialist | Capti, within the agreed service scope |
| Capacity planning | Your equipment and optical design | An agreed service capacity and upgrade plan |
| Customer hand-off | Defined optical termination points | A defined service interface |
| Best fit | Direct engineering control | An operated connection with clear support responsibilities |
For a more detailed investment assessment, read our comparison of dark fibre and managed business fibre.
Where dark fibre makes sense
The strongest opportunities usually involve established locations, substantial traffic between them and a reason to control how the connection operates.
- Data centre connections: linking infrastructure for replication, storage transfers or private access to hosted systems.
- Enterprise sites and campuses: connecting offices, laboratories or operational facilities as part of a wider private network.
- Media and production: moving large video, design or production files between locations.
- Network operators and service providers: connecting network sites or building a transmission platform around their own equipment.
These are examples of suitable requirements, rather than a guarantee that dark fibre is available or economical at every site. A managed Ethernet or wavelength service may be a better fit when route availability, operating resources or capacity requirements favour that model.
Assessing routes across Australia
Capti assesses dark fibre and managed fibre requirements across Australia, using its own infrastructure and selected wholesale network partners. This allows us to consider options beyond the buildings connected directly to our own network.
Availability is assessed for the specific route. A fibre network near a building does not by itself confirm an available fibre pair, access into the premises or an end-to-end path to the other location.
The assessment considers both endpoints, available fibre, building entry, termination arrangements and any construction or third-party work. Regional, intercity and more complex paths may also require intermediate equipment sites and a more detailed optical design.
Your proposal identifies the service scope, delivery dependencies and commercial terms for the assessed route. National reach means we can investigate suitable options across the country; each connection remains subject to service qualification and feasibility.
Capacity, resilience and security
Dark fibre offers considerable flexibility, but it does not have unlimited practical capacity. Equipment capability, optical loss, distance and the transmission design all matter. A future upgrade may involve new optics or transmission equipment, and longer paths may require amplification or regeneration.
Resilience also needs deliberate design. Two fibre services can share a cable, duct, building entrance or equipment location. If continuity is important, ask for an assessment of the physical paths and common points of failure. Our guide to diverse fibre and fixed wireless connections explains the questions to ask.
A dedicated fibre path provides separation from other customers’ traffic on that pair. It does not automatically encrypt your data or secure the systems at either end. Encryption, access controls and equipment security remain part of the overall network design.
What goes into a dark fibre quote?
A useful quote starts with the exact endpoints and the required operating model. The total cost can include fibre rental, installation or construction, building access and data centre cross-connects. Equipment, rack space, power, maintenance and support also need to be accounted for, whether you provide them or include them in a managed service.
Service commitments should be equally clear. Establish where each party’s responsibility begins and ends, what happens during a fault, and which restoration targets and exclusions apply. Those details belong in the proposal and service agreement for your route.
For unlit fibre, include your equipment and operating costs in the comparison. For a managed connection, check the contracted capacity, upgrade options and the precise equipment and support scope.
Plan your connection with Capti
Whether you want to light the fibre yourself or have Capti manage the connection, we can begin with a route and requirements assessment.
Send us the addresses of the sites or data centres you need to connect, your current and expected capacity needs, the target delivery date and any resilience requirements. Tell us whether you prefer unlit fibre or Capti-managed equipment.
Talk to Capti about your fibre route and we will assess the options for your locations. You can also explore our dark fibre service.
