People can check the execution status of Ethernet-linked machine by outside PC in real-time It displays highly detailed maintenance information for occurred DGN. Moreover, it is enable to the quick response to the reduction of the recovery period and to the arrangement of spare parts by doing maintenance directly. Moreover, user's machine is connected by the telephone line from our company service base, and it is enable quick response by maintaining the situation of a machine directly at time shortening, replacement parts which should be arranged to restoration.