Duplex Fiber Optic Cable is a type of fiber optic cabling that contains two optical fibers inside. Both fibers are tight buffered and surrounded by aramid yarn for protection and strength. The tight buffered fibers and the aramid yarn are covered with a PVC outer jacket. The outer jacket most commonly looks like a zipcord, similar to the electric cord on a lamp or small appliance. It can also simply be round. Duplex cable is commonly used to make fiber optic assemblies or patch cables and it is used in situations where the devices transmit and receive data.
