- Contains 24 optical fibers for high-speed data transmission. - Operating wavelengths: 1310 nm / 1550 nm with typical attenuation of 0. PBT TubeThe Central Tube Optical Ground Wire (OPGW) is surrounded by single or double layers of aluminum clad steel wires (ACS) or mix ACS wires and aluminum alloy wires, 24 Core OPGW Cable design is fully adapted to the most common electric line needs. High quality standards for designing, testing and. CentraCore optical cable houses and protects the optical fibers within a central gel-filled stainless steel tube inside an aluminum pipe. FIBER OPTIC CABLE Fiber Optic Cable © 2002. This OPGW Cable With 24 Single Mode Optical Fibers is designed especially for the purpose of fulfilling the requirements of the electrical network, mechanical structure, quality, and cost.