| 摘要 |
PURPOSE:To grasp an accurate command operating time by providing a master clock and an incoming time display function to a command board of a railway command telephone system. CONSTITUTION:The command board 1 is provided with a position equipment 11, display control section 12, display time memory section 13, master clock 14 and a display section 15; and an equipment frame 2 is provided with a command trunk 21 from each communication line and a call signal transmission section 22. When a call comes from a command telephone set, the corresponding trunk of the equipment frame of the command station is in incoming state, the incoming is displayed on the command board 1 and a commander issures response operation. The connection between the position equipment and the trunk is formed by the response operation, the display control section extracts its time from the master clock and stores it to a display time memory section. The stored content is displayed to a display section and the display is continued until the command personnel makes restoration. The commander can record accurately a command incoming time even if the talking continues for a long time. |
