Singlemode LC/APC-SC Duplex OS2 1 m. Cable length: 1 m. Fiber quality: OS2. Duplex. Connectors: LC/APC - SC. SC connectors are standard connectors for fiber optic cabling. They feature an automatic locking mechanism and a twist protection. Their use is recommended for new installations of computer networks using fiber optic technology. The connector is suitable for singlemode and multimode fibers. It can be used to create simplex, duplex, and multiple connections. LC connectors. The LC connector is a high-performance fiber optic connector for singlemode and multimode applications, characterized by low insertion loss. It is one of the most common types of fiber optic connectors. The design of the LC connector is based on a single-fiber ceramic ferrule with a diameter of 1.25 mm for a fiber optic cable. Due to its compact design, the LC connector allows for high packing density, making it frequently used for fiber optic switches. APC - Angled Physical Contact. Connectors with the APC designation have an end face that is not only rounded but also tilted a few degrees relative to the fiber axis. This design allows reflected light from the core to be refracted out into the air through the cladding, thereby preventing interference with data transmission.