| 摘要 |
PURPOSE: To provide a remote communication equipment provided with a circuit device for subscriber device which generates a DC voltage without using an AC voltage generator. CONSTITUTION: In this remote communication equipment provided with the circuit device, which can be connected to a call alternating voltage generator 1 or a subscriber feed circuit 9 through a changeover switch 6, for a subscriber device 16, a capacitor 15 is provided between the subscriber device 16 and the changeover switch 6, and two rectifier devices 13 and 14 are used to generate a DC voltage component to be superposed on an AC voltage which can be supplied from the call alternating voltage generator, and an evaluation circuit 17 is provided to switch the changeover switch based on the capacitor electric charge. |
