A switch node for the communication of circuit switched and packet information via parallel electrical and photonic connections within the node between input links and output links. The links each have electrical and optical sublinks. A node is responsive to an address received via the electrical sublink...http://www.google.com.tw/patents/US4731878?utm_source=gb-gplus-share專利 US4731878 - Self-routing switch node combining electronic and photonic switching
