LINE CONTROL SYSTEM AND METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide a line control system and a method therefor for simultaneously transmitting the same data by a plurality of communication networks and employing the data received first on the receiving side.SOLUTION: A line control system includes a transmitter and a receiver connected with each other via a plurality of communication networks. The transmitter is provided with: a transmission telegraph data creation part which creates transmission telegraph data from a telegraph; a communication data creation part which creates one or more pieces of communication data from the transmission telegraph data created by the transmission telegraph data creation part; and a transmitter group including a plurality of transmitters which transmit the communication data created by the communication data creation part. The receiver is provided with: a receiver group including a plurality of receivers which receive the communication data; a receiving control part which restores the transmission telegraph data from the communication data received by the plurality of receivers; a buffer which stores the telegraph data restored by the receiving control part; and a telegraph processing part which receives the transmission telegraph data stored in the buffer to extract the telegraph.