Network communication apparatus and bridge apparatus

A network communication apparatus (N1) has an interface (15) for allowing digital data to be transferred to a node apparatus (N4) on a second network via a bus bridge apparatus through which a first network (B1) having the network communication apparatus (N1) connected thereto and the second network are connected, and a bus reset processing section (13) for, when bus resetting occurs on the first network, generating a notify signal for notifying the occurrence of the bus resetting and supplying this signal to the node apparatus (N4) on the second network through the bus bridge apparatus.