Patent ID: 9357012
Filing Date: 2016-05-31
CPC Classification: H04L

Claim Text:
1. A relay communication system comprising: client terminals and relay servers connected via a network, each of the client terminals being configured to communicate, via one of the relay servers to which the respective client terminal is connected, with another one of the relay servers or one of the client terminals that is connected to the another one of the relay servers, each of the relay servers being configured to communicate with another one of the relay servers or with one of the client terminals connected to the another one of the relay servers, the relay servers being configured to communicate with each other via a WAN, and each of the client terminals being configured to communicate via a LAN with a respective one of the relay servers where the client terminal is connected; wherein one of the relay servers is configured to function as a center terminal; at least one of the relay servers is configured to function as at least one target terminal; at least one of the relay servers is configured to function as at least one maintenance terminal; at least one of the client terminals is configured to function as a target system connected to any of the at least one target terminal via a first LAN; at least one of the client terminals is configured to function as a maintenance operating terminal connected to any of the at least one maintenance terminal via a second LAN; the target system is operated by the maintenance operating terminal via the first LAN, the WAN, and the second LAN; the center terminal includes: each of the at least one maintenance terminal and the at least one target terminal includes a center terminal ID registering unit configured to register a center terminal ID; the center terminal is configured to make a connection job that associates a predetermined target terminal ID with the operator ID and is configured to register the connection job to the center terminal; any of the least one maintenance terminal is configured to receive the operator ID and the password from the connected maintenance operating terminal and send an inquiry to the center terminal whether or not the at least one maintenance terminal can log in to the center terminal, and, if logging-in is granted, the at least one maintenance terminal is configured to receive the connection job assigned to the operator ID from the center terminal and notify an operator of the connection job; the at least one maintenance terminal is configured to send an inquiry to the center terminal about whether or not the at least one maintenance terminal can execute the connection job when the at least one maintenance terminal receives a selection of the connection job from the operator; and if the connection job is allowed to be executed, the at least one maintenance terminal establishes a routing session to the target terminal based on the target terminal ID included in the connection job, and exchanges network address of the first LAN and the second LAN with the target terminal such that the maintenance operating terminal communicates with the target system via the established routing session.