This high-density, Layer 3 Managed PoE Switch series features PLANET™ intelligent PoE functions to improve the availability of critical business applications. It provides IPv6/IPv4 dual stack management and built-in Layer 3 dynamic OSPFv2 and static routing capability along with 48 10/100/1000BASE-T ports featuring IEEE 802.3at PoE+ and 4 additional 10G SFP+ uplink slots. With a total power budget of up to 400 watts for different kinds of PoE applications, the GS-5220-48P4X series provides a quick, safe and cost-effective PoE network solution for small businesses and enterprises. Redundant power source.