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1. 发明授权

US4757496A Distributed telephone system 失效
标题翻译：分布式电话系统
公开(公告)号：US4757496A
公开(公告)日：1988-07-12
申请号：US852171
申请日：1986-04-15
申请人： Chauncey I. Bartholet , Joseph Hardy
发明人： Chauncey I. Bartholet , Joseph Hardy
IPC分类号： H04M9/02 , H04J3/16
CPC分类号： H04M9/027
摘要： A communication system is provided for the interconnection of telephones and other instruments capable of communicating via the voice spectrum, the system providing a single transmission line such as a coaxial cable by which full duplex communication is provided between any pair of telephones. Each instrument is coupled to the transmission line by a control unit which includes computer operated transceiver equipment for paging other ones of the control units to initiate a telephonic communication. Each control unit is provided with an identification number and circuitry for recognizing the identification number contained within a paging signal so as to initiate a response. In a separate spectral portion of the transmission line, there are provided sets of analog communication channels each of which has upper and lower spectral portions to provide two-way communication in opposite directions between a pair of telephones engaged in communication. A transmitter and a receiver in each of the control units is provided for the communication of analog signals of both voice and data via the voice channel, each control unit including circuitry for tuning the transmitter and the receiver to the selected channel in accordance with digital data transmitted via the transmission line and specifying a selected one of the voice channels.
摘要翻译：提供了一种通信系统，用于电话和能够通过语音频谱进行通信的其他仪器的互连，该系统提供诸如同轴电缆的单一传输线，通过该传输线在任何一对电话之间提供全双工通信。每个仪器通过控制单元耦合到传输线，控制单元包括用于寻呼其他控制单元以启动电话通信的计算机操作的收发器设备。每个控制单元设置有识别号码和电路，用于识别包含在寻呼信号内的标识号，以便发起响应。在传输线的单独的频谱部分中，提供了一组模拟通信信道，每个模拟通信信道具有上和下频谱部分，以在一对从事通信的电话之间的相反方向上提供双向通信。每个控制单元中的发射器和接收器被提供用于经由语音信道通信语音和数据的模拟信号，每个控制单元包括根据数字数据将发射机和接收机调谐到所选择的信道的电路经由传输线路发送并指定所选择的语音信道之一。

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