Sierra Leone Air-blown Optical Cable

For Sierra Leone, air-blown fiber systems like Leviton BLOLITE™ or MicroBlo™, installed in microducts using air-assisted techniques, are recommended for resilience, long-distance deployment, and ease of maintenance.

Recommended Cable Systems

Leviton BLOLITE™ and MicroBlo™ are proven air-blown fiber systems suitable for both internal and external applications. They allow pre-installed ducting routes, enabling fibers to be blown in as needed, which reduces installation risk and provides flexibility for future network expansion.

BLOLIT

E supports backbone and fiber-to-the-desk links, with long-distance capabilities up to 1 km per segment, and is compatible with standard optical connectors. These systems have demonstrated high reliability with zero failure rates since 1988 and are used by major organizations worldwide, indicating robustness for challenging environments. Installation ConsiderationsAir-blown fiber cables should be installed using air-assisted techniques such as blowing or jetting.

These methods minimize friction and sidewall pressure, allowing longer cable lengths to be installed efficiently. Key points include: Use a bullet or tractor device matching the cable diameter to facilitate smooth installation. Maintain a duct fill ratio of 50–80% for optimal performance and to prevent cable deformation.

Avoid combining pulling with air-assisted installation to prevent damage. Plug ducts before and after installation to prevent water ingress. Field trials indicate that a single air-assisted device can install 1.

5–2. 1 km of cable under good conditions, with longer distances achievable using mid-assist devices.

Standards Compliance

Ensure that the selected cable meets ITU-T Recommendation L. 108, which defines the characteristics and test methods for microduct fiber units suitable for blowing installation. Compliance ensures the cable performs reliably under the intended environmental and operational conditions.

Local Context Considerations

Sierra Leone's fiber backbone faces challenges such as: Vandalism: Approximately 90% of cable damage is deliberate, so using microducts with air-blown fibers allows easier replacement without trenching. Power instability: Air-blown systems reduce the need for frequent maintenance, which is critical in areas with unreliable electricity. Long-distance deployment: Air-blown fiber allows installation of long cable runs without splicing, reducing labor and material costs.

Summary Recommendation

For Sierra Leone, it is recommended to deploy air-blown fiber systems in microducts, such as Leviton BLOLITE™ or MicroBlo™, installed using air-assisted blowing techniques. Ensure compliance with ITU-T L. 108 standards, maintain proper duct fill ratios, and plan for mid-assist devices for longer runs.

This approach maximizes reliability, simplifies maintenance, and mitigates risks from vandalism and environmental challenges.