Indoor fiber optic patch cords connect optical devices like routers, switches and servers within buildings or data centers. Features Each assembly comes with full traceability and test. Fiber Types: HOLIGHT offers a selection of fiber types to accommodate different transmission requirements, including single-mode (OS1/OS2) and multimode (OM1/OM2/OM3/OM4) fibers. Depending on the application, customers can choose the appropriate fiber type to achieve optimal performance over short. Corning offers the most complete line of connectors and factory-terminated cables, from single-fiber patch cords to high-fiber-count assemblies. They may be deployed in-duct (conduit) or cable tray.