Dark Fibre

Dark Fibre

Providing you with complete flexibility and control of your network.

Experience complete bandwidth and protocol flexibility - limited only by the type of equipment you connect at each end - with Dark Fibre. This unlit fibre is a Layer 1 physical network service operated between 2 end points and built on a passive network. This means you can:

  • Rapidly and cost-effectively upgrade without any additional carrier costs as your business requirements and technology evolves.
  • Run 1Gbps Ethernet, 10Gbps Ethernet, Fibre Channel (SAN) or multiple DWDM wavelengths across the service by connecting the corresponding hardware at each end.
  • Fibre2air provides the peace of mind of physically separate and secure fibre optics. Diverse routes are usually available to enable you to construct highly reliable, low latency networks on which you have the flexibility to overlay any protocol you require.


  • Scalable - your Dark Fibre network grows with you as your bandwidth requirements increase.
  • Secure - Dark Fibre provides the essential security you require: dedicated, private network infrastructure for high levels of privacy and security.
  • Cost effective - add additional bandwidth and services as your business grows.
  • Network Monitoring - monitored 24x7 by our network management specialists.


Parameter Specifications
Fibre Type Single Mode Optical Fibre (SMOF) conforming to G.652 spec
Acrylate Coating Diameter 245 ± 5 μm
Cladding Diameter125 ± 1 μm
Cladding Non-Circularity<1.0%
Core/Cladding Concentricity Error< 0.5 μm
Attenuation at 1310 nm 0.40 dB/km maximum
Attenuation at 1550 nm0.25 dB/km maximum
Mode Field Diameter at 1310 nm9.2 ± 0.4 μm
Cabled Cut-Off Wavelength< 1260 nm
Minimum Zero Dispersion Wavelength1300 nm
Maximum Zero Dispersion Wavelength1322 nm
Dispersion Slope (Maximum at λ0)0.092 ps/(nm2.km)
Dispersion Window 1285 - 1330 nm3.5 ps/(nm.km)
Maximum Dispersion at 1550 nm18 ps/(nm.km)
Proof Test Strain1.0 %

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