An SC (Subscriber Connector) adapter is a type of optical fiber adapter,also called a coupler, used to join fiber optic cables in telecommunication and networking systems. It is known for their "push-pull" design, which allows for easy insertion and removal. Divided into single-mode and multi-mode adapters. Also divided into adapters for different connectors such as FC, SC, LC, ST, MPO, etc. SC adapters are used in telecom networks for connecting devices such as switches, routers, and fiber optic transmission equipment.