Communication terminal apparatus for data communication between network and computers and data communication method using it

摘要

A computer (10) operates to supply a command to a communication termination apparatus (20) so that the communication termination apparatus (20) may be connected with a provider for allocating a global address to the communication termination apparatus (20). Then, the authenticating process is executed between the computer (10) and the communication termination apparatus (20) and a private address is allocated to the computer (10). When the sending data with the private address is supplied from the computer (10), the communication termination apparatus (20) operates to convert the sending source private address into the global address and then add to the sending data the ID information for determining which of computers has sent the data. When the responding data is supplied from the network to the communication termination apparatus (20), a destination address of the responding data is converted from the global address of the communication termination apparatus (20) into the private address based on the ID information added to the responding data. <IMAGE>