COMMUNICATION SYSTEM, ROUTE SELECTION APPARATUS, AND ROUTE SELECTION METHOD

摘要

A communication system in which a plurality of communication networks are interconnected, the communication system including a plurality of inter-communication network connections that include an inter-communication network connection by a first circuit performing communication by a first protocol and an inter-communication network connection by a second circuit performing communication by a second protocol, including: a route selection apparatus that is provided in a communication network that is connected to another communication network by the first circuit, and that is connected to another communication network by the second circuit; and an address resolution apparatus that can communicate with the route selection apparatus, wherein the route selection apparatus sends an inquiry to the address resolution apparatus about an address corresponding to an incoming number in a connection request signal transmitted from a user apparatus in the communication network so as to determine whether to transmit the connection request signal to a communication network of an incoming destination via the first circuit or to transmit the connection request signal to a communication network of an incoming destination via the second circuit based on a response received from the address resolution apparatus.