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What is Underdround Fiber Optic Cable?

Underground fibre optic cable is a type of outdoor fiber cables that is laid underground to connect communication facilities at different locations, providing reliable and fast long-distance transmission. It has been increasingly used in telecommunications networks around the world.

Features of Underground Fibre Optic Cable

1. High bandwidth communication transmission;

2. Long distance transmission;

3. Immunity, high resistance to electromagnetic interference;

4. higher security, less susceptible to damage and destructive behavior.

Two Types of Fiber Optic Underground Cable

When it comes to underground fibre optic cables, they can usually be divided into two main types: underground pipeline fiber cables and direct buried fiber optic cables. They differ in installation methods, protection measures, and application scenarios.

Underground Pipeline Fiber Cable

Underground pipeline fiber optical cable refers to the cable laying in the underground pipeline, according to the different geographical environment, the pipeline can be made of concrete, steel pipe, plastic pipe and so on. As the environment of pipeline laying is better, there is usually no special requirement for the cable sheath, and no armor is required.


  • Pipeline Protection: Optical cables are laied through pipelines, providing additional protection against adverse factors such as external pressure, humidity, and temperature changes.
  • Flexibility: Fiber optic cables can be added or replaced in the pipelines as needed, providing a certain degree of flexibility.
  • Maintenance & Repair: As the fibre cable is located inside the pipeline, it is relatively easy to find faulty cables and repair the problem.


  1. Urban Communication Network: used to connect communication facilities in different locations, such as buildings, computer rooms, telecommunications operators’ facilities, etc.
  2. Public Facilities: used to connect urban infrastructure, such as intelligent transportation systems, monitoring systems, public safety communication systems, etc.
  3. Data Center: used for high-speed data transmission and backup between data centers.
Underground Pipeline Fiber Cable

Direct Buried Fiber Optic Cable

Direct buried fibre optic cables are those directly buried underground without pipeline protection. This requires direct bury fiber optic cables to have the ability to resist external mechanical damage, insect, mouse, and ant bites, and prevent soil corrosion. They are more sturdy and have armored structures with steel strips or wires.


  • Low Cost: Compared to overhead or pipeline laying, direct burial does not require additional material, equipment, and labor costs, saving installation costs.
  • Convenient Construction & Installation: Adopting the direct burial laying method can provide more flexibility in path planning, adapt to the needs of different routes, and meet the needs of network expansion.
  • Excellent Performance: As the fiber cables are used underground, their own structure makes them have the advantages of strong crush resistance and corrosion resistance.


  1. Rural and Remote Areas: used in areas lacking pipeline facilities, directly buried optical cables can become an economically effective solution.
  2. FTTH: used to connect fiber optic to users’ terminal devices, providing fiber optic access to personal homes or businesses.
Direct Burial Fiber Optic Cable

Gcabling Fiber Underground Cable

Standard Fibre Optic Underground Cable

If you need fibre optic underground cables, please contact Gcabling. Here we list several standard underground fiber cables.

Underground Pipeline Fiber Optic Cable

Direct Burial Fiber Optic Cable

Customize Your Underground Fiber Cable

If our standard underground fibre cables cannot meet the demand, we can do OEM / ODM according to your specifications.

Customization Process

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Optical Fiber

No. of Fiber Core

Short Term Tension

Short term crush

Jacket Material

8 + 10 =