Indoor fiber optic cable is tight buffer design, usually they consist of the following components inside the cable, the FRP which is non-metallic strengthen member, the tight buffer optical fiber, the Kevlar which is used to further strength the cable structure, making it resist high tension, and the cable outer jacket. The trend is to use LSZH or other RoHS compliant PVC materials to make the cable jacket; this will help protect the environment and the health of the end users. Indoor Cables Cables for indoor applications include the following: * Simplex cables * Duplex cables * Multifiber cables * Heavy-, light-, and plenum-duty cables * Breakout cables * Ribbon cables Although thes categories overlap, they represent the common ways of referring to fibers. Figure 7-5 shows cross sections of several typcial cables types. Simplex Cables A simplex fiber cable consists of a single strand of glass of plastic fiber. Simplex fiber is most often used where only a singl...