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ADSS (All‑Dielectric Self‑Supporting) optical cable, short for All‑Dielectric Self‑Supporting Optical Fiber Cable in Chinese, is a non‑metallic cable constructed entirely from dielectric materials. Integrating its inherent self‑supporting structure, it can be directly mounted on utility transmission towers. It is widely deployed for communication links on overhead high‑voltage power transmission systems, and also suited for overhead communication applications in lightning‑prone areas and long‑span installation scenarios.

• Light weight, small outer diameter, torque‑free design and high tensile strength
• High elastic modulus to accommodate large stress‑strain performance
• Low coefficient of thermal expansion
• Excellent vibration‑damping capability
• Favourable elastic resilience
• Superior lightning‑safety performance
• Variable cross‑sectional area of aramid strength members allows adaptation to installation requirements for different span lengths and sag values

• Can be installed on the same transmission towers together with high‑voltage transmission lines of 220 kV and below.
• Installation can be performed live‑line, without attaching to phase conductors or earth wires.
• Communication and power transmission operate as independent systems, so maintenance and repair work on one will not interfere with the other.
• Dedicated calculation software provides accurate computation of electric‑field distribution and installation sag, to determine the optimal mounting position.

• In 1995, Huiyuan ADSS cables commenced trial operation in Sichuan power grid. After over 20 years under severe ice‑coating in Southwest mountainous terrain, the lines keep safe service, marking China's longest safe operating record for ADSS cables.
• In 1996, China's first ADSS cable with high‑voltage anti‑electrical‑erosion sheath was installed on a 220kV line and remains reliable up to now.
• In 2008, China's longest‑span (1860m) ADSS cable was successfully brought into safe service in heavy‑ice zones of western Sichuan mountains.