In a high speed digital network including access nodes and network nodes each having topology data bases, a method for optimizing the connection set-up operations required for connecting a calling end-user attached to a local access node to a destination user attached to a remote access node, via a conventional...http://www.google.com.au/patents/US6246669?utm_source=gb-gplus-sharePatent US6246669 - Method and system for optimizing connection set-up operations in a high speed digital network