A network system comprises a printing device, and a plurality of management devices that manages the printing device via a network. The printing device comprises a plurality of communication interfaces individually connected to the network, a trouble detecting system that detects troubles caused in the...http://www.google.fr/patents/US7725775?utm_source=gb-gplus-shareBrevet US7725775 - Network system, printing device, and control program for printing device
Network system, printing device, and control program for printing device
