. . . . "Each of these nodes has a routing table in a form shown in FIG. 3 in which an interface and a corresponding VPI/VCI are specified for the input side and the output side such that the data transfer can be carried out according to this table. [0104] Each of the terminal devices 2A to 2G is a device such as a personal computer (PC), a workstation (WS), a printer, a server, etc., which has an ATM inte" .