Engineered for reliable data transmission, this high-density fibre optic cable boasts 24 cores, ensuring robust connectivity and minimal signal loss. Its single-mode (9/125) design provides optimal efficiency for long-distance communication. Reliable 24 Core Single Mode Fibre cable. Designed specifically for non-metallic ADSS installations on power transmission lines, our fibre optic cable ensures seamless data transmission over long distances. 652D (OS2) fibers, which feature a core. By replacing the solid core with an air-filled channel, hollow-core fibers (HCFs) allow light to propagate at nearly its vacuum speed, reaching approximately 3×10 8 meters per second. This reduces latency to around 3. 5 microseconds per kilometer, offering a 30 to 50 percent speed increase. Hollow core fiber's name offers a clue as to how it differs from regular fiber.