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PROBLEM TO BE SOLVED: To achieve cost reduction, quick recovery from a failure, and improvement on workability of facility update.SOLUTION: A CTC (Centralized Traffic Control) station device 20 includes a first communication circuit 21 connected to a CTC line 12, a second communication circuit 36 co

PROBLEM TO BE SOLVED: To achieve cost reduction, quick recovery from a failure, and improvement on workability of facility update.SOLUTION: A CTC (Centralized Traffic Control) station device 20 includes a first communication circuit 21 connected to a CTC line 12, a second communication circuit 36 connected to another line 41, data 33 on a station other than an installation site for holding display information related to an on-site instrument at a station other than an installation site, a first expanded communication program 32 for executing, through the first communication circuit 21, reception of a telegraphic message of control information related to the instrument at the station other than the installation site and transmission of a telegraphic message of display information of the data 33 on a station other than an installation site, and a second expanded communication program 35 for causing the data 33 on a station other than an installation site to hold the display information acquired through the second communication circuit 36, and for transferring the control information acquired by the first expanded communication program 32 through the second communication circuit 36. The expanded communication programs 32 and 35 execute a function of the CTC station device related to the station other than the installation site so that it is possible to reduce the cost of a facility at a single-line station, etc. and to carry out recovery of a line failure and update of a station device sectionally.SELECTED DRAWING: Figure 1

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