The fiber, either single-mode or multimode type, are positioned in a sub-unit jacket, containing Aramid yarn and 6/12 fiber. This multi-unit design allows sub-unit to be routed to different areas/panels, ease termination, and connection. A Fiber Reinforced Plastic (FRP) locates in the center of the core as a non-metallic strength member. Sub-unit are stranded around the strength member into a compact and circular cable core, thus achieving 36 -144 fiber. Each fiber is mechanically reinforced with two successive sheaths of 400µm and 900µm which enables direct termination of connectors.