Single core indoor optical cables are made of tight or semitight fiber optic cables using the latest coating technology, and are wapped witharamid yarn reinforcement elements and then extded witha layer of pobinyl chloride (PVC) or halogen-free flame retardant outer sheath. This type of optical cable is suitable for indoor wring and connecting inside and outside optical transmission equipment, and can also be usedto make tail fibers and jumpers.