| 摘要 |
<p>An automatic reply circuit for example for an intercon station or automatic doorkeeper reacting to a call signal transmitted from outside a door controlled by an electric latch, comprises a circuit (F8) for detecting the call signal, a clock (F1) for selecting several functions to be executed in responce to the signal depending on the time of day, and circuits for executing the functions including a control circuit (F4) for the latch and a transmitter (F3) for transmitting at least one predetermined stored message to the door area. A control circuit (F4) connected to the detection circuit, function circuits and function selector controls the execution of the selected functions in response to detection of the call signal.</p> |
