A switch is provided that receives user information through a plurality of framer circuits, which group the user information into frames. The frames are fed to a switch fabric including an array of switch elements, each having a switch matrix for routing each frame to a desired output in accordance with...http://www.google.com.au/patents/US7184432?utm_source=gb-gplus-sharePatent US7184432 - Switch fabric architecture and techniques for implementing rapid hitless switchover
