Specifically, the POL solution adopts a simple and centralized architecture, including the optical line terminal (OLT) deployed in the equipment room and the optical network unit (ONU) deployed at the end of the room, thus eliminating the need for multi-layer distribution of traditional LAN networks and managing from a single point In the entire network, the network administrator only needs to operate the OLT, and the ONU terminals in each room can be connected immediately, which improves the overall operation and maintenance efficiency by 60%.