Patent ID: 7656826
Filing Date: 2010-02-02
Classification: H04L

Abstract:
1. A terminal control system comprising: a main control device; a plurality of terminal devices controlled by the main control device; and communication lines for connecting the main control device and each of the terminal devices so as to allow bidirectional communication, wherein control data is simultaneously and collectively sent from the main control device to the terminal devices; terminal data for each of the terminal devices is independently sent from each of the terminal devices to the main control device; the main control device has downstream transmission means for sending the control data to the terminal devices, and a plurality of upstream receiving means for independently receiving the terminal data from the terminal devices; the terminal devices have upstream transmission means for sending the terminal data from the terminal devices to the main control device, and downstream receiving means for receiving the control data from the main control device; and the communication lines have downstream communication lines for sending shared control data from the downstream transmission means to the downstream receiving means, and upstream communication lines for sending individual terminal data from the upstream transmission means to the corresponding upstream receiving means.