公开(公告)号：US3949172A

公开(公告)日：1976-04-06

申请号：US440830

申请日：1974-02-08

申请人： William M. Brown ,  John M. Ruddy ,  Robert T. Dunn

发明人： William M. Brown ,  John M. Ruddy ,  Robert T. Dunn

IPC分类号： H04B3/54 ,  H04M1/723 ,  H04M11/00

CPC分类号： H04M1/723 ,  H04B3/54 ,  H04B2203/5437

摘要： An extension telephone system communicates with a conventional subscriber telephone line where the subscriber's line telephone is located, through available AC power wires which carry signals that may be modulations of RF carrier frequencies and which are coupled to the power wires. Incoming telephone line signals are detected and modulate a first RF carrier frequency which is coupled to the AC power wires at the line telephone location and these signals are coupled from the AC power wires at an extension telephone location, and, demodulated and fed to an extension telephone which is energized by DC power derived from the AC power wires at the extension location. The extension telephone produces extension telephone signals which modulate a second RF carrier frequency which is coupled to the AC power wires at the extension location and this modulated carrier is coupled from the AC power wires and demodulated at the line telephone to produce the extension telephone signals in suitable form for applying to the telephone line. Thus, telephone calls to the subscriber's line telephone can be received by the extension telephone and calls to the telephone extension telephones can be connected to this system wherever there is access to the same AC power wires.

摘要翻译： 分机电话系统通过可携带可能是RF载波频率调制并且耦合到电力线的信号的可用AC电力线与用户线路电话所在的常规用户电话线路进行通信。 检测出来的电话线路信号并且调制耦合到线路电话位置处的AC电力线的第一RF载波频率，并且这些信号在分机电话位置处从AC电力线耦合，并被解调并馈送到分机 电话由在分机位置的交流电源线产生的直流电力通电。 分机电话产生扩展电话信号，其调制在扩展位置处耦合到AC电力线的第二RF载波频率，并且该调制载波从AC电力线耦合并在线路电话处解调以产生分机电话信号 适用于电话线的适当形式。 因此，可以由分机电话接收对用户线路电话的电话呼叫，并且呼叫到电话分机，电话机可以连接到该系统，无论何时访问相同的AC电力线。

公开(公告)号：US4058678A

公开(公告)日：1977-11-15

申请号：US674557

申请日：1976-04-07

申请人： Robert T. Dunn ,  William M. Brown ,  John M. Ruddy

发明人： Robert T. Dunn ,  William M. Brown ,  John M. Ruddy

IPC分类号： H04B3/54 ,  H04M11/04

CPC分类号： H04B3/54 ,  H04B2203/5437

摘要： A remote transmitting or receiving device (T/R device) communicates with a conventional subscriber telephone through available AC power wires which carry signals that may be modulations of RF carrier frequencies and which are coupled to the power wires. For example, an incoming telephone call includes signals that are detected and modulate a master RF carrier frequency which is coupled to the AC power wires at the telephone line location and these signals are coupled from the AC power wires at a remote R device location, and, demodulated and used to control an electrical appliance, motor, pump, etc. The remote T device which may be, for example, a fire detector produces signals which modulate a remote RF carrier frequency which is coupled to the AC power wires at the remote location and this modulated carrier is coupled from the AC power wires and demodulated at the telephone line location to control or initiate signals in suitable form for transmission over the telephone line. Thus, telephone calls to the subscriber's telephone line can be received at the remote location to turn on an electrical device at that location; or signals originating at the remote location initiate a telephone call and message from the transcriber's telephone line.

摘要翻译： 远程发送或接收设备（T / R设备）通过可用的交流电力线与常规用户电话进行通信，所述AC电力线承载可以是RF载波频率的调制并且耦合到电力线的信号。 例如，进入的电话呼叫包括被检测的信号并且调制主RF载波频率，该主RF载波频率耦合到电话线位置处的AC电力线，并且这些信号在远程R设备位置处从AC电力线耦合，以及 ，解调并用于控制电器，电动机，泵等。可以是例如火情检测器的远程T装置产生调制远程RF载波频率的信号，其耦合到远程的AC电力线 位置，并且该调制载波从AC电力线耦合并在电话线路位置进行解调，以控制或发起适当形式的信号以便通过电话线传输。 因此，可以在远程位置接收到用户电话线路的电话呼叫以打开该位置处的电气设备; 或者来自远程位置的信号从转录器的电话线路发起电话呼叫和消息。