A gateway (GW) for relaying a communication between a public telephone network and a routing server for managing use status of the GW and a network are provided on the internet. When a connection request is received, the GW issues a request to retrieve a route in which the costs are minimum and a necessary...http://www.google.es/patents/US6483835?utm_source=gb-gplus-sharePatente US6483835 - Communication system with communication route retrieval and selection function
Communication system with communication route retrieval and selection function
