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Helios is a last-mile pure dark-fibre access service that connects your end customer location to a corresponding DFA aggregation node. You connect your own active network equipment to have full control over the services that you provide to your customer. A Helios service terminates at an end customer location and includes reticulation.

• End-to-end dark fibre between your end customer location and our corresponding DFA aggregation node.
• Allows you to connect your own active network equipment for unlimited, uncapped throughput.


Helios links connect your customer sites to DFA’s Tachyon enabled nodes, enabling you to aggregate traffic onto your core network. Helios infrastructure is normally deployed in a star topology.

Data sheet

Connectivity options Tachyon aggregation nodes to access site
Non-recurring charge Connection fee
Monthly recurring charge Fixed lease payment
Lease/payment terms 2 years
Fibre pairs Single
Redundancy Optional diverse link back to same Tachyon aggregation node
Access build

Entry into meet-me room at the access site

In-building reticulation from meet-me-room to end customer (cost limit)

Service level

4-hour Mean Time To Repair (MTTR)

Monitoring Main route


Terms and conditions


  • Helios links are available only in the vicinity of DFA aggregation nodes within predefined DFA aggregation areas.
  • One termination point must always be at a DFA aggregation node.
  • Feasibility will be determined within a predefined distance from our existing infrastructure which is subject to technical and commercial feasibility. Additional build can be provided at a nominal rate per meter.

DFA’s responsibilities

  • DFA will install its own reticulation in accordance with the rules of the landlord up to the agreed termination point.

Your responsibilities

  • Any third-party costs that the landlord may charge will be for your account.
  • You will need to install and maintain your own equipment.
  • You will need to negotiate landlord permission for fibre entry. DFA will assist where possible.
  • You will be liable for abortive costs if DFA incurs costs as a result of, among other things, your sites not being ready or you are cancelling an order.


  • If you are ordering a diverse Helios link, you must clearly specify that in your order and indicate the primary Helios link.
  • If a second access entry is needed for the diverse link, DFA will cover the build cost subject to feasibility rules.
  • Standard Helios feasibility rules apply to diverse links.


  • Aggregating multiplexed traffic from various end customers (Lumic can be used for this purpose).
  • Reselling as a dark-fibre service.
  • Using, in part or in full, for:
    – core-network backhaul
    – mobile backhaul
    – microwave backhaul.
  • Terminating at locations such as:
    – data centres
    – high sites
    – meet-me rooms

Terminations and cancellations

  • The terms and conditions for termination will be stipulated in the commercial agreement.

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