| 摘要 |
PURPOSE:To prevent any hindrance for the use of a line by other slave set in the case of talking by the slave set in an area by sending a termination signal to the slave set during talking after elapse of a prescribed time and interrupting the talking in the case of the talking between slave sets in the area and between the slave set and an extension telephone set or an external line. CONSTITUTION:The system consists of called exclusive master sets 1a-1c, 2a-2c, 3a-3c, caller exclusive master sets 4-6, incoming call controllers 7a-7c, and a call controller 8 or the like. In this case, when a slave set 21 in an area reaches a talking state, the master set connecting to the slave set 21 by a radio line counts the talking time and after a prescribed time elapses, the termination signal is sent to the slave set 21. On the other hand, based on the termination signal, the slave set 21 interrupts the radio line. That is, in the slave set 21 in the area, the talking time of the talking from this side or from the other side is controlled. Thus, the use of the line is attained in the other slave set 21 and the disabled long time talking is not caused. |
