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Telephone answering machine - has static logic circuit selecting required control functions by movable or static switches
Telephone answering machine - has static logic circuit selecting required control functions by movable or static switches
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机译:电话答录机-具有静态逻辑电路,通过可动或静态开关选择所需的控制功能
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摘要
Each of the switches makes only one single contact; each contact is made between a specified circuit point and a common terminal, e.g. frame. Each switch controls an input of a static flip-flop with two inputs. The device may have five switches realising following functions: operation as a plain answering machine; as a recording answering machine; prerecording on an endless tape; test playback of the prerecorded message; playback of messages from other subscribers. A further circuit for static change-over switching may be provided. A loudspeaker may be provided for playback of a message during recording, and a switch for uninterrupted recording of a message.
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