The powerful and compact Summit X450 series is the first fixed-format switch based on the revolutionary ExtremeWare XOS core-class operating system. ExtremeWare XOS introduced by Extreme Networks in 2003, is a highly resilient, modular operating system that takes availability to the highest levels and greatly enhances manageability. The Summit X450 series also uses the same high-performance, non-blocking hardware technology used on Extreme Networks BlackDiamond 8800 Series, continuing an Extreme Networks' tradition of simplifying network deployments through the use of common hardware and software throughout the network.The extremely versatile Summit X450 series, with high-density gigabit plus optional 10 Gigabit Ethernet in a compact one rack-unit format, supports a full range of Layer 2 to Layer 4 features on every port to ensure highest productivity. It is available in two versions, a fiber version supporting flexible and convenient modular optics, and a copper version suitable for local data distribution, both versions having optional redundant power supplies to provide insurance against power anomalies.