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    Voice mail system on magnetic tape
    1.
    发明授权
    Voice mail system on magnetic tape 失效
    磁带上的语音邮件系统

    公开(公告)号：US4747126A

    公开(公告)日：1988-05-24

    申请号：US833888

    申请日：1986-02-27

    申请人： William G. Hood ,  Thomas D. Klarquist ,  Kai-Dick Lee ,  Bruce C. Nepple ,  Daniel C. Olin ,  Lawrence B. Park ,  Michael C. Park

    发明人： William G. Hood ,  Thomas D. Klarquist ,  Kai-Dick Lee ,  Bruce C. Nepple ,  Daniel C. Olin ,  Lawrence B. Park ,  Michael C. Park

    IPC分类号： G11B15/02 ,  G11B27/10 ,  G11B27/11 ,  G11B27/13 ,  G11B27/28 ,  H04M3/533 ,  H04M3/537 ,  H04M1/65

    CPC分类号： G11B27/28 ,  G11B15/023 ,  G11B27/107 ,  G11B27/11 ,  G11B27/13 ,  H04M3/533 ,  H04M3/537 ,  G11B2220/65 ,  G11B2220/90

    摘要： The present invention is a magnetic tape-based "voice mail" multi-user message system. The system transmits audio prompts to callers to help guide them through the various procedures. The callers respond with Touch-Tone commands. A novel circuit is provided to detect these tone commands without significant interference from the audio prompt signals. This circuit is highly insensitive to deviations in the impedance of the incoming telephone line from its expected value. A circuit is also provided to prevent Touch-Tone commands which are recorded on tape from being re-executed when they are played back from the tape. A single L.E.D. indicator on each recipient's telephone set indicates the status of the system: idle with new message waiting; idle without new message waiting; busy with new message waiting; or busy without new message waiting.

    摘要翻译： 本发明是一种基于磁带的“语音邮件”多用户消息系统。 系统向呼叫者发送音频提示，以帮助他们指导各种程序。 来电者使用Touch-Tone命令进行响应。 提供了一种新颖的电路来检测这些音调命令而没有来自音频提示信号的显着干扰。 该电路对输入电话线路的阻抗与其预期值的偏差高度不敏感。 还提供了一种电路，用于防止录制在磁带上的Touch-Tone命令在从磁带播放时重新执行。 一个L.E.D. 每个接收者的电话机上的指示灯指示系统的状态：空闲，新消息等待; 闲置没有新消息等待; 忙于新消息等待; 或忙碌而没有新消息等待。