How the FC fiber connector works: screw-lock mechanism, PC vs APC polish, specs, and comparison with LC and SC connectors. The FC connector (Ferrule Connector, or Fixed Connection) is a single-mode fiber optic connector distinguished by its threaded screw-lock coupling mechanism. The following guide systematically describes. FC Connectors, also known as Ferrule Core Connectors, are often referred to by various names like "Fiber Channel" or "Frank Charlie" in the industry. Developed by NTT (Nippon Telegraph and Telephone) in the late 1970s as the "Field-Assembly Connector," FC Connectors were the first to feature a. In this guide, PHILISUN, a trusted provider of fiber optic connectivity solutions, offers an in-depth overview to help professionals and network planners make informed decisions when designing or upgrading their optical systems. FC is the abbreviation of Ferrule Connector, indicating that the external reinforcement method is to use a metal sleeve, and the fastening me hod is a screw buckle. In modern networking, four. I. What is an optical fiber patch Cable? An optical fiber patch Cable is a jumper wire used to connect from equipment to an optical fiber cabling link, and it is usually used for the connection between an optical transceiver and a terminal box.