| 摘要 |
PURPOSE:To transfer the newest quick busy information at all times, by reducing the burden of a central control device, through the constitution of an exchanger system so that each relay stand controller can make reference to a vacant state storage device provided with respective devices. CONSTITUTION:Each relay stand controller is provided with a vacant state storage device which receives and stores the information transfer relating to the vacant state of a subscriber from a central controller, and each relay stand controller makes reference to respective vacant state storage device and transmits quick busy information. For example, as shown in figure, a plurality of terminal processing system 61-6m are connected to a central controller 2 of a central processing system 1, and relay stands 311-31n...3m1-3mn are respectively connected to each terminal processing system. Further, each terminal processing system is provided with vacant state storage devices 51-5m corresponding to relay stand controllers 41-4m and each relay stand controller, allowing each relay stand controller to make reference to respective vacant state storage devices and to transfer quick busy information. |
