| 摘要 |
PURPOSE:To reduce a cost by connecting a transmitter with a call signal generation circuit generating a call signal which can be inputted directly to its modulation input through a switch circuit network, in a private branch exchange. CONSTITUTION:Transmitters 5 and 6 connected to transmitter interface circuits 3 and 4 respectively receive a call signal outputted from a call signal generation circuit 7 through a switch network 2 and relay it to the transmitters 5 and 6. When the subscriber of a telephone 9 set leaves his seat and goes to the area of the transmitter 5, by operating the telephone set a control circuit 10 controls the switch network 2 and connects the pass between the call signal generation circuit 7 and the transmitter interface circuit 3 in the case of an incoming to the subscriber (when the incoming comes to the telephone 9) if an absence transfer destination is registered in the transmitter 5. And then the control circuit 10 controls the call signal generation circuit 7 so as to output the call signal of the telephone 9 and turn on the transmitter to execute call operation. |
