air-blown-micro-cable
central-loose-tube-micro-cable

Central tube, air-blown, microfiber cable

  • Available in 2-24 fiber counts
  • Blowing installation
  • Nylon sheath with low coefficient of friction
  • Glass yarn is used as a stress-relief and absorption material
  • Compact structure with excellent flexibility
  • Basic rodent protection

  • Dramatically Reduced Installation Time

  • Lower Labor and Equipment Costs

  • Longer installation distances ,Smaller Trenching and Conduit Requirements

  • Future-proof scalability
  • Fully dielectric

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General Specifications
Product type Air Blown Microfiber Cable Central tube
Construction Type Non-armored
Fiber Coloring White
Jacket Marking Feet/Meter
Jacket Material Nylon
Subunit Type Gel-filled
Total Fiber Count 2-24
Dimensions
Buffer Tube/Subunit Diameter 2 mm | 0.079 in
Diameter Over Jacket 2.5 mm | 0.098 in
Mechanical Specifications
Max. Tensile Strength, Long-Term 75 N | 16.861 lbf
Minimum Bend Radius, loaded 30 mm | 1.181 in
Minimum Bend Radius, unloaded 30 mm | 1.181 in
Compression 10 N/mm   |   57.101 lb/in
Flex 25 cycles
Impact 2 N-m | 17.701 in lb
Twist 10 cycles
Optical Specifications
Fiber Type G.652.D and G.657.A1
Attenuation, maximum 0.3 dB/km @ 1,550 nm | 0.4 dB/km @ 1,310 nm/1383 nm
Environmental Specifications
Installation temperature -10 °C to +60 °C (+14 °F to +140 °F)
Operating Temperature -20 °C to +60 °C (-4 °F to +140 °F)
Storage Temperature -20 °C to +60 °C (-4 °F to +140 °F)
Cable Qualification Standards ANSI/ICEA S-87-640 | IEEE-1222
Environmental Test Specifications
Environmental Space  Air Blown Microfiber Cable Central tube used for Air-blown, microduct
UV Resistance UV stabilized
Temperature Cycle -20 °C to +60 °C (-4 °F to +140 °F)
Packaging and Weights
Cable weight 6.6 kg/km | 4.435 lb/kft

 

  • Outdoor installation

  • Distribution Networks

  • Microduct installation

  • FTTH & last mile connection

  • 5G Backhaul and Fronthaul

  • Data Center Interconnects

  • Rural Broadband

  • Smart City and IoT Networks

Q1: What is a Central Loose Tube Fiber Optic Cable?

A: A central loose tube cable features a single, central protective plastic tube housing all optical fibers (typically 2 to 24 fibers). The fibers float inside the tube, which is filled with a water-blocking gel or dry water-swellable materials. Structural reinforcement is provided by parallel strength members (such as dual FRP rods or steel wires) placed symmetrically on both sides of the central tube under an outer HDPE/LSZH jacket.

Q2: Central Loose Tube vs. Stranded Loose Tube: What are the main differences?

Feature Central Loose Tube Cable Stranded Loose Tube Cable
Structure Single central tube containing all fibers Multiple loose tubes stranded around a Central Strength Member (CSM)
Fiber Count Low to medium capacity (typically 2 to 24 fibers) High capacity (24 to 288+ fibers)
Cable Diameter & Weight Smaller outer diameter, lightweight Larger outer diameter, heavier weight
Installation & Cost Cost-effective, faster stripping, compact splice trays Higher material & labor cost, flexible breakout per tube

Q3: What are the key advantages of Central Loose Tube Cables?

  • Compact & Lightweight Structure: Saves space in micro-ducts, conduits, and cable trays, making it ideal for high-density routes.

  • Cost Efficiency: Simplifies manufacturing and reduces installation/splicing time, leading to significant material and labor savings.

  • Balanced Mechanical Protection: Dual parallel strength members ensure stable tensile strength while protecting the fibers from axial load stress.

Q4: Are Central Loose Tube Cables suitable for FTTH and Air-Blowing Micro Duct deployments?

Yes. Central loose tube micro cables are widely used in FTTH last-mile access and micro duct networks. Their slim profile (3–6 mm outer diameter) and low friction outer jackets allow long-distance pneumatic air blowing (1,000–2,500 meters) into micro ducts with minimal tension.

Q5: What mechanical and environmental protection options are available?

  • Waterproofing: Available in gel-filled or gel-free (dry tube) designs using water-blocking yarn/tape for faster, cleaner splicing.

  • Armored & Anti-Rodent Protection:

    • Corrugated Steel Tape (PSP): Provides crush resistance and rodent protection for direct-buried or underground duct applications (e.g., GYXTW).

    • Non-Metallic Protection: Uses glass yarn, aramid yarn, or FRP rods for all-dielectric, lightning-proof installations.

Q6: How do I choose the right Central Loose Tube specification for my project?

  1. Deployment Method:

    • Air Blowing Micro Duct: Select a non-metallic, lightweight, and low-friction micro cable.

    • Duct / Direct Buried / High Rodent Risk: Choose a corrugated steel tape armored cable (e.g., GYXTW).

    • Aerial (Self-Supporting / Messenger): Select a Figure-8 or FRP-reinforced aerial central tube cable.

  2. Fiber Selection: Standard Single-Mode (G.652D) or Bend-Insensitive Single-Mode (G.657A1/A2) for tight bend radiuses in distribution boxes.

Engineered for Reliability, Built for Trust

At Telexc, we don’t just supply hardware—we secure your global network deployment. Operating from China’s premier industrial clusters and the Tianjin logistics hub, we act as your private supply chain control tower, ensuring engineering precision and traceably consistent quality for every aerial installation.

Our Core Advantages

  • Full-Scenario Aerial Compatibility: We seamlessly bridge the gap between OSP fiber infrastructure, FTTH networks, and aerial deployment scenarios. Every component is structurally engineered to work harmoniously together, drastically increasing on-site installation efficiency.
  • Strict Engineering Standard Alignment: Our technical design loops strictly align with international benchmarks, including IEC, ITU-T, and IEEE standards. This ensures our hardware excels under extreme environmental stresses—from intense UV exposure to heavy wind and ice loads.
  • Independent Multi-Stage Quality Control: We act as your eyes on the ground. From raw material stress simulations to finished product compliance, our dedicated QC team performs rigorous multi-stage audits so you receive exactly what your engineers approved.
  • Optimized Logistics & Flexible Partnerships: Leveraging the logistics power of the Tianjin port, we guarantee reliable transit, competitive factory-direct structures, and transparent milestone tracking to keep your network projects moving forward without compromise.

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