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| Model | GYXTW |
| Fiber counts | 2F - 24F |
| Tube | Central Loose Tube |
| Water-blocking material | Water-blokcing tape / Filling compound |
| Armor | Corrugated Steel Tape (CST) |
| Strength Member | Parallel Steel Wire |
| Outer Sheath | PE/ LSZH |
| Temperature Range | - 40 °C to 70 °C |
| Application | Aerial/ Duct/ UG Installation |
GYXTW-12
GYXTW-4
This cable belongs to the "GY" series (a Chinese national standard classification for outdoor fiber optic cables), with two core enhancements:
CST Armoring: Corrugated Steel Tape (CST) wrapped around the cable core to provide mechanical protection against compression, impact, and rodent bites.
2 Parallel Steel Wires Strengh Member: Two high-strength steel wires placed parallel to the cable axis, significantly improving the cable's tensile strength (critical for aerial installation or long-span deployment).
The cable follows a layered design, from the innermost optical fibers to the outermost sheath, with each layer serving a specific protective or functional purpose. The structure is as follows (from inside to outside):
| Layner No. | Component Material | Function |
| 1. Optical Fibers | Single-mode (SM, e.g., G.652D) or Multimode (MM, e.g., G.651) | Transmit optical signals; core count typically ranges from 2 to 12 fibers. |
| 2. Central Loose Tube | PBT (Polybutylene terephthalate) loose tube filled with tube gel | Protect fibers, provides buffer space for fiber expansion and blocks moisture. |
| 3. CST Armor | Corrugated Steel Tape | Physical protection: resists compression, impact, and rodent gnawing; maintains cable shape. |
| 4. Parallel Steel Wires | Galvanized steel wires (diameter: ~1.5-2.0mm) | Primary tensile reinforcement: supports the cable's weight in aerial installation or resists pulling during burial. |
| 5. Outer Sheath | Low-smoke zero-halogen (LSZH) or polyethylene (PE) | Outermost protection: resists UV radiation, aging, chemical corrosion (e.g., soil chemicals), and water. |
High Tensile Strength: The 2 parallel steel wires enable the cable to withstand tensile forces of up to 1500-2000 N (depending on wire diameter), making it ideal for aerial installation (e.g., spanning between utility poles) or long-distance buried deployment (resisting pulling during laying).
Strong Impact/Compression Resistance: The CST armor layer (corrugated structure) absorbs external impact and compression, preventing damage to the internal fiber core—suitable for areas with frequent human activity (e.g., near roads) or animal interference (rodents).
Moisture & Water Blocking: The central loose tube’s water-blocking gel and PE/LSZH outer sheath form a dual moisture barrier, ensuring no water intrusion even if the sheath is slightly damaged. The cable meets the "water tightness" standard for outdoor cables (no water leakage after 24-hour immersion).
UV & Aging Resistance: The outer PE/LSZH sheath is added with UV stabilizers, allowing long-term exposure to sunlight (aerial use) without sheath cracking or performance degradation (service life: ≥20 years).
Corrosion Resistance: Galvanized steel (for CST and steel wires) and chemical-resistant sheath materials resist corrosion from soil salts, industrial pollutants, or acidic/alkaline environments.
Low Fiber Attenuation: The central loose tube design minimizes micro-bending of fibers (caused by temperature changes or mechanical stress), ensuring stable signal transmission. For single-mode fibers (G.652D), attenuation is as low as 0.36 dB/km (at 1310 nm) and 0.22 dB/km (at 1550 nm).
Temperature Stability: The loose tube and sheath materials have a wide operating temperature range of -40°C to +70°C, adapting to extreme cold (e.g., northern regions) or high-temperature (e.g., desert areas) environments.
Lightweight & Flexible: Compared to fully armored cables (e.g., steel wire armoring), the CST layer and parallel steel wires balance protection and flexibility, reducing installation difficulty (e.g., bending around poles).
Clear Structure: The central loose tube design simplifies fiber splicing and maintenance—technicians can quickly access fibers without disassembling complex stranded structures.
Due to its durability and environmental resistance, this cable is widely used in outdoor long-distance communication networks and scenarios requiring high reliability:
Deployed between utility poles (aerial installation) for rural, suburban, or highway communication networks. The 2 parallel steel wires bear the cable's weight, while the CST armor resists wind load and bird damage.
Example: Connecting 4G/5G base stations in remote areas or transmitting data between municipal communication hubs.
Buried directly in soil (without a protective pipe) for urban backbone networks, industrial parks, or campus perimeter networks. The CST armor and outer sheath resist soil pressure, rodent bites, and chemical corrosion.
Example: Laying between data centers in different industrial zones to build a low-latency optical fiber backbone.
Mining Areas: Resists vibration, impact, and dust; used for underground mine communication (though typically with additional flame-retardant sheaths).
Coastal Regions: Corrosion-resistant materials (galvanized steel, PE sheath) withstand salt spray and high humidity.
Power System Matching: Used in power communication networks (e.g., accompanying high-voltage transmission lines) to transmit monitoring data—LSZH sheath options meet fire safety requirements for power facilities.
Rapidly deployed for disaster recovery (e.g., after earthquakes or floods) due to its high tensile strength and easy installation, restoring communication in damaged areas.
This series supports 2 to 24 cores. If you need higher fiber counts (>24), choose stranded loose tube types such as GYTA / GYTS.
✅Yes. It uses water-blocking gel inside the central loose tube, plus water-blocking yarns around the tube, to meet outdoor water penetration requirements.
✅Yes. We can offer OEM custom service. Just send us your company logo, meter marking requirements.
Reel Length:
normally 2km, 3km, 4km, 5km (as your request)
Drum options:
Fumigated Wooden Drum
Steel-reinforced Wooden Drum
Plywood Drum.
Cable and Drum Marking according to customer's requirements.
Shipping Pictures:
