DS-3E0318P-E/M(B) switch is a layer 2 long-range PoE switch, providing 16× 100Mbps PoE ports, 1 × 1000Mbps RJ45 port, and 1 × 1000Mbps SFP fiber optical port. The switch provides advanced PoE technology and supports extend mode with long-range access up to 250 m. The prior and stable transmission of the important surveillance area videos can also be guaranteed when connected to the high priority ports. The switch is reliable, easy to install and maintain, and equipped with rapid switching functions. With multiple access ports, it is applicable for access or aggregation and upload of small-scale LAN devices.