The ExtremeSwitching X440-G2 series is based on Extreme Networks ExtremeXOS, a highly resilient OS that provides continuous uptime, manageability and operational efficiency. Each switch offers the same high-performance, non-blocking hardware technology, in the Extreme Networks tradition of simplifying network deployments through the use of common hardware and software throughout the network. The ExtremeSwitching X440-G2 switches are cost-effective campus edge switches with IEEE 802.3at PoE-plus.