| 摘要 |
PURPOSE:To enable the operation of call, end of call and response for the wired terminal, by enabling the DC loop control for the wired terminal unit. CONSTITUTION:A part of the output of the receiver 23 of the wired terminal is fed to the delivery signal switch 27, the control signal detector 19 is provided for the mobile terminal, and the wired terminal is provided with the incoming call display unit 35 responsing to the 16 Hz call out signal. Further, the transmitters 22 and 11 are dilivered for the electromagnetic waves if requested with the logic control circuits 30 and 15, and the reveiver 23 is intermittently operated as required. Further, the manual switch 38 driving the line switch 33 is provided with the wired terminal and the hold signal oscillator 39 delivering the information to the wired delivery line 31 in response to the switch 38 is provided. With this constitution, the control of the DC loop of the delivery line 31 is made. |
