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1. 发明授权

US4430639A Visual message intercommunication unit and system 失效
标题翻译：视讯消息互通单元和系统
公开(公告)号：US4430639A
公开(公告)日：1984-02-07
申请号：US265773
申请日：1981-05-21
申请人： Dale L. Bennett , Robert J. Grady , James L. Konsevich , Perry H. Vartanian
发明人： Dale L. Bennett , Robert J. Grady , James L. Konsevich , Perry H. Vartanian
IPC分类号： H04B3/54
CPC分类号： H04B3/542 , H04B2203/5408 , H04B2203/5441 , H04B2203/5445
摘要： Each of a plurality of message terminal units (10, 12, 14, 16) has a keyboard (20) for entry of data, a visual display (22) for display of entered and received data, and a logic system (FIG. 4) for processing received and transmitted messages. Each unit stores in a CPU (52) a dedicated user terminal identification. Each transmitted message is annexed to a destination terminal identification and said user terminal identification (FIG. 5). Only a unit with a stored user identification identical to the destination identification in a transmitted message can receive and display transmitted messages. Upon receipt of a message, a terminal sends an automatic response to the sending terminal, which provides an appropriate indication to the sender. The receiver can send a manual acknowledgement (42) to the sender, which causes the message to be cleared from the sender's display. The units transmit messages via pulse modulation of a high frequency carrier over a supply power line (26) so that no special wiring is required. A unit can send messages to plural destinations and indicate which destination units have received the message. Optionally, a user can store plural incoming messages (FIG. 7) and selectively display same. Also, optionally, a unit can send its user's identification indicia, upon attempted entry thereof, to all other units which will compare the attempted identification entry indicia with their stored user identification indicia (FIG. 8) and indicate if the same indicia are already in use, thereby preventing two users from using the same indicia so as to insure privacy of transmission. A unit can be made to automatically send a fixed message upon receipt of any message, this feature being most useful to indicate a user's temporary absence.
摘要翻译：多个消息终端单元（10,12,14,16）中的每一个具有用于输入数据的键盘（20），用于显示输入和接收数据的视觉显示（22）和逻辑系统（图4 ）用于处理接收和发送的消息。每个单元存储在CPU（52）中的专用用户终端标识。每个发送的消息被附加到目的地终端标识和所述用户终端标识（图5）。具有与发送的消息中的目的地标识相同的存储的用户标识的单元可以接收并显示所发送的消息。在接收到消息时，终端向发送终端发送自动响应，向发送方提供适当的指示。接收机可以向发送方发送手动确认（42），这导致消息从发送者的显示中清除。单元通过电力线（26）上的高频载波的脉冲调制发送消息，使得不需要特殊的布线。单元可以向多个目的地发送消息，并指示哪些目的地单元已经接收到该消息。可选地，用户可以存储多个输入消息（图7）并且选择性地显示相同的消息。此外，可选地，一个单元可以在尝试进入时将其用户的识别标记发送到将将尝试的标识条目标记与其存储的用户识别标记（图8）进行比较的所有其他单元，并且指示相同的标记是否已经在使用，从而防止两个用户使用相同的标记，以确保传输的隐私。一个单位可以在收到任何消息后自动发送一个固定的消息，这个功能对于指示用户暂时不存在是最有用的。

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