| 摘要 |
PURPOSE:To suppress the toll of a line at minimum in the case of using an ordinary telephone line network and to heighten the activity efficiency of the line in case of using a dedicated telephone line network by installing a line control part near a terminal and performing signal transmission for a long distance between a center and the line control part with a few number of lines. CONSTITUTION:The center 10 is constituted of a console 11 and a multiple address control part 12, and the multiple address control part 12 is connected by plural relay centers (20a-20m) constituted of the line control parts (2a-2m), respectively, and telephone lines (10a-10m). Also, the line control parts (2a-2m) are connected by plural terminals 30 and the telephone lines (20a1-20an) and (20m1-20mt), respectively. Therefore, when the relay centers (20a-20m) are installed near the terminal 30, it follows that the center 10 installed separately far away is connected to the relay centers (20a-20m) with a few number of lines. In such a way, it is possible to suppress the toll of the line at minimum and to improve the activity efficiency of the line. |
