Industrial-grade fiber optic bypass switches can be installed in 100M/1G/10G fiber optic networks. It protects the network from failures and subsequent maintenance by ensuring the integrity of the network during power outages. When a power failure occurs, the bypass switch is quickly set to bypass mode to isolate the main network from local network equipment. When the power returns to normal, the bypass switch will switch to the normal state and the local network equipment will be connected to the main network. It can be used with a CTCU industrial network switches to ensure non-stop network connectivity.