These cables are used for indoor applications and consist of 4, 6, 8, 12 single-mode (G652B or G652D) or multimode (MM62.5/125 or MM50/125) fibres.
Each fibre is coated to a 900 micron diameter, with a durable, protective material and the coating (buffer material). Each fibre is uniquely colour coded as defined in Table 1. Surrounding the group of buffered fibres are aramid yarns to provide the sufficient tensile strength to the cable, which effectively avoids damaging the cable during the installation, transports, operation etc. An outer sheath is then applied over the tight fibre / aramid assembly. The outer sheath has a flame retardant function, PVC (Riser OFNR).