Gel filled multi loose tube cable in Figure 8 for aerial outdoor installation. Metallic messenger as strength member. PAYMA - 2ª Pl -. In the ever-expanding universe of fiber optic networks, where speeds reach 800G and beyond while global FTTH connections surpass 2. A single steel wire or stranded steel wires are applied as the messenger. This cable. Figure 8 Fiber Optic Cable is a specially constructed fiber optical cable whose appearance is similar to the number “8”, hence the name.