| 摘要 |
PURPOSE:To simplify a constitution by analyzing a called address in a calling signal with a centralized control station, selecting an incoming terminal, sending an incoming signal to the incoming terminal with a subscriber signal line, which passes through a subscriber line exchange, and setting a communication path between an outgoing terminal and the incoming terminal. CONSTITUTION:The calling signal to be transmitted by a terminal 11 is directly transferred to a centralized control station 3 by a subscriber signal line 131, which passes through a subscriber line exchange 21. The centralized control station 3 selects an incoming terminal 12 by analyzing the called address in the calling signal and samely as the outgoing terminal 11, the terminating call signal is sent to the terminating terminal 12 by a subscriber signal line 132 to pass through a subscriber line exchange 22. Then, the communication path is set between the outgoing and terminating terminals 11 and 12. Thus, a subscriber line signal processing or a subscriber condition control, etc., are eliminated for the subscriber line exchange 21 connected to the terminal 11, or a base station. Further, since subscriber data are controlled with concentration in the centralized control station 3 and routing control is executed, even when a received exchange is changed attending to the moving of a subscriber, such a case can be made correspondent by rewriting the subscriber data of the centralized control station 3. |
