Importance

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Abstract

A method for joining and seceding from communications networks includes steps (a), (b) and (c). Step (a) is to register, at a first one of the communications networks indicated by first address information, second address information in first system definition information, the second address information registered in the first system definition information concerning the first one of the communications networks indicating a second one of the communications networks with which the first one of the communications networks requests to communicate. Step (b) is to register, at the first one of the communications networks, the second address information in second system definition information, the second address information registered in the second system definition information indicating that the first one of the communications networks is allowed to communicate with the second one of the communications networks. Step (c) is to assign, at the first one of the communications networks, a management number to the first address information and the second address information so as to be operatively linked together, whereby the first one of the communications networks can communicate with the second one of the communications networks by using the second system definition information referred to by the management number.

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First Claim