| 摘要 |
PURPOSE:To select a terminal with which a communication is preferaly made by sending the address of an opponent terminal which terminates during communication to a data terminal by a data switching network on the on-hook operation of the data terminal. CONSTITUTION:A busy state monitoring circuit 9 monitors the on-hook operation of a terminal circuit 3, and turns on an on-hook detection display line 26 when detecting the on-back operation of a terminal 2. An AND circuit 10 indicates the transmission of the contents of an originating terminal address storage memory 11 from a busy incoming opponent address transmission line 29 to the data terminal 2 through the terminal circuit 3 when a busy incoming state holding circuit 25 is on in the on state of the display line 26. The AND circuit 10 resets the state of a busy incoming display circuit 8 at the same time. The data terminal 2 is informed of the address of an original terminal which is to terminates during the communication right after its on-hook operation, so the terminal is called when necessary. |
