Patent ID: 6844886

Claim:
A network control system comprising: a device; a first unit having included therein a controller operable to control said device, said controller comprising a user interface including a display; and a second unit, connected to said first unit through a transmission path, having said device included therein, wherein at least one of said first unit and said second unit is operable to handle at least one of video data, audio data, and information data, wherein said device has screen display data for displaying an operating screen of said device and identification information for identifying the screen display data, wherein said device is operable to transmit the screen display data and the identification information to said controller through the transmission path, wherein, when a state of said device is changed, said device transmits updated screen display data to said controller, and wherein said controller is operable to receive the screen display data and the identification information from said device through the transmission path, to receive the updated screen display data when a state of said device is changed, to instruct said display to display the operating screen using the screen display data, and to update the operating screen upon receiving updated screen display data from said device.