| 摘要 |
In a relay communication system in which remote LANs communicate with one another beyond a WAN, a method and apparatus prevent crossover among a plurality of call controls in each of a plurality of sections and crossover among a plurality of communication routes in each of the plurality of sections. Relay servers relay communication between client terminals. A relay server creates information described below, and allows a whole of a relay communication system to share the information: relay group information indicating that the relay servers constitute a relay group; and relay server information indicating a client terminal capable of communicating with the relay server. The relay servers and the client terminals collate identification information of call control, which is transmitted when the call control is executed for a destination for communication in each section, and identification information of call control, which is received from the destination for communication in each section when a communication route is established, with each other, and allows the call controls and the communication routes to correspond to each other.
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