| 摘要 |
PURPOSE:To enable to prevent an interference of a talking circuit between each group without spoiling the equalization of call of each group, by making a call reservation available time of each group circulate in order, and also storing the call reservation both in the master station and the slave station of each group. CONSTITUTION:The master stations of the third and fourth groups are in a state that the electric power source is cut off, its circulation attains to the first group, and in ths case, when a call is reserved to this first group master station, this master station starts a call to its slave station. When this call duration attains to a prescribed time, it is transferred to the second group. The second group master station transmits its group signal and waits for a call reservation signal from its slave station side, but when there is no call reservation in the slave station side, the call is transferred to the third group. In this case, as for the master stations of the third and fourth groups, the electric power source is cut off, therefore, the call is passed to the fifth group. The fifth group master station transmits its group signal, and starts a call to the slave station when there is a call reservation in the slave station side. A call request of this slave station is the request which has been generated previously and has been stored. In this way, a chance of call of each group can be equalized by making each group circulate in order. |
