Exported ADSS optical cable OM4

ADSS optical cables with OM4 fibers are all-dielectric, self-supporting aerial cables designed for outdoor use, offering high tensile strength, environmental resilience, and long-distance installation capability.

Cable Structure and Fiber Type

ADSS (All-Dielectric Self-Supporting) cables are designed without metallic components, making them immune to electromagnetic interference. The OM4 designation refers to multimode fibers optimized for high-speed data transmission, typically supporting 10G, 40G, and 100G Ethernet over longer distances than OM3 fibers. The fibers are housed in loose tubes, often filled with a water-blocking gel to prevent moisture ingress, and reinforced with aramid yarns or fiber-reinforced plastic central strength members to bear tensile loads .

Mechanical and Environmental Performance

The mechanical performance of ADSS cables is characterized by:

• Maximum Allowable Tension (MAT) and Every Day Strength (EDS) for long-term operation .
• Ultimate tensile strength provided by aramid yarns, which have an elastic modulus over half that of steel, allowing the cable to withstand strong winds and icing conditions .
• Sag and thermal expansion: ADSS cables exhibit minimal sag variation with temperature changes, and under icing, the cable length may increase by up to 0.6%, compared to 0.1% for conventional wires .
• Crush resistance and durability for outdoor installation, with installation temperature ranges typically from -10°C to +40°C and storage from -20°C to +70°C .

Sheath and Protection

The outer sheath is usually PE (polyethylene) or AT material, providing UV resistance, moisture protection, and suitability for high-voltage environments. Some cables feature special anti-tracking PEIAT sheaths for installation near high-voltage lines . The all-dielectric design eliminates electromagnetic induction effects, ensuring signal integrity.

Installation and Span

ADSS cables are self-supporting, allowing installation between poles without additional support. Typical maximum spans range from 150 meters to over 1200 meters, depending on cable design, environmental conditions, and load on suspension points . Initial sag at 20°C is usually around 1% of the span. The SZ-stranded loose tube design isolates fibers from mechanical stress and facilitates mid-span access .

Applications

These cables are suitable for:

• Outdoor aerial deployment along power lines or telecom poles.
• High-speed data networks requiring multimode OM4 fibers.
• Environments with extreme weather, including high winds, ice, and temperature fluctuations.

Summary

Exported ADSS OM4 optical cables combine high-performance multimode fibers, robust mechanical design, and environmental resilience, making them ideal for long-distance, self-supporting aerial installations. They are engineered to maintain signal integrity, resist environmental stress, and provide reliable operation over decades .