A method for moving permanent virtual circuits in an ATM network with minimal downtime includes creating a list of the permanent virtual circuits to be moved; building a set of shadow permanent virtual circuits using the new ATM port and a temporary set of virtual path identifier and virtual circuit...http://www.google.com.tw/patents/US7408874?utm_source=gb-gplus-share專利 US7408874 - Method for moving network elements with minimal network outages in an active ATM network
