| 摘要 |
PURPOSE:To reduce a battery load of an automobile by adopting the constitution such that power is supplied from a prepared secondary battery when an automatic answering function is activated in the case of supplying power to an automobile telephone radio equipment. CONSTITUTION:A relay 10 is closed and a relay 12 is opened. Power is supplied from a BATT line of an automobile to an automobile telephone radio equipment 2 and an on-vehicle automatic answering telephone set 1, and a secondary battery 14 is charged through a charging section 16 by a voltage of an ACC line of an automobile. A detection section 20 detects the off-state of the ACC line, a control section 19 activates the relay 12 and deenergizes the relay 10. As a result, power is supplied to the automobile telephone radio equipment 2. When an incoming signal is received from the radio equipment 2 via a control signal processing section 21, an automatic answering telephone set 60 replies to the call to start recording of a voice of an opposite party and a reply message is sent after recording to terminate the talking. When a voltage is applied to the ACC line, the detection section 20 detects the voltage and the control section 19 restores the relays and power is supplied to the radio equipment 2 via the BATT line. Through the constitution above, the battery load of the automobile is relieved. |
