| 摘要 |
PURPOSE:To save the communication circuits, by connecting plural circuit terminals to a circuit. CONSTITUTION:When a TSS (time sharing system) terminal 5 completes a transmission of analog signals via a switch circuit 7, a timer 9 is started by a use end signal. The timer 9 counts the time and transmits a control signal to a switch control circuit 8 so that a high-grade terminal 6 is connected to a communication circuit. Thus a simultaneous use can be avoided for both terminals, and the both terminals can be connected to a public circuit as long as they are exclusive to each other. |
