A user I/F unit 200 transmits an instruction given by a user to an access management unit 100 and displays data on a monitor 76. The access management unit 100 transfers requirements to a communication control unit 300 and a data management unit 400 in response to the instruction from the user, transfers...http://www.google.com.au/patents/US5905866?utm_source=gb-gplus-sharePatent US5905866 - Data-update monitoring in communications network
