S5720-28TP-PWR-LI-AC(24 Ethernet 10/100/1000 ports,2 Gig SFP and 2 dual-purpose 10/100/1000 or SFP,PoE+,370W POE AC 110/220V), The S5720-LI is a next-generation energy-saving gigabit Ethernet switch that provides flexible GE access ports and 10 GE uplink ports. Building on next-generation, high-performance hardware and the Huawei Versatile Routing Platform (VRP), the S5720-LI supports intelligent stack (iStack), flexible Ethernet networking, and diversified security control. It provides customers with a green, easy-to-manage, easy-to-expand, and cost-effective gigabit to the desktop solution. In addition, Huawei customizes specialized models to meet customer requirements to suit special scenarios.The models with front power sockets can be installed in the 300 mm deep cabinet. They can be maintained through the front panel, saving space in small equipment rooms.The S5720-12TP-LI-AC adopts the ground-free design. Only the 220V power module needs to be grounded. This design facilitates switch deployment in places where grounding is difficult, such as in a corridor.The models that use a fan-free design reduce power consumption and noise.