公开(公告)号：US4776006A

公开(公告)日：1988-10-04

申请号：US41567

申请日：1987-04-23

申请人： Timothy N. Comerford ,  Jan R. Holliday ,  Michael J. McLane

发明人： Timothy N. Comerford ,  Jan R. Holliday ,  Michael J. McLane

IPC分类号： H04Q3/58 ,  H04M1/723 ,  H04M9/02 ,  H04M1/72 ,  H04M9/10

CPC分类号： H04M9/027 ,  H04M1/723

摘要： A multiplexed data channel telephone system comprising a master station (221) and one or more remote stations (222) is disclosed. Each station (221, 222) is bridged, in a parallel electrical connection, onto a wire-pair (201) that extends from the stations to a telephone switching system. Each station (221, 222) includes a voiceband line interface (110, 310) for connecting to the wire-pair (201) at voiceband frequencies, and a radio frequency line interface (700, 800) for connecting to the wire-pair (201) at radio frequencies. Each station further includes multiplexer and demultiplexer equipment (500, 600) for frequency shifting a data channel between baseband and rf. Amplitude modulation and half-duplex transmission are used in the data channel. Telephone status and control information, including ringing and answer control, are exchanged between controllers (160, 360) via the data channel. Remote stations (222) minimize the amount of equipment required by using the data channel to control common equipment at the master station (221) that interacts with incoming telephone lines (201, 202).

摘要翻译： 公开了一种包括主站（221）和一个或多个远程站（222）的复用数据信道电话系统。 每个站（221,222）以并联电连接桥接到从站延伸到电话交换系统的有线对（201）上。 每个站（221,222）包括用于以语音频带频率连接到线对（201）的语音频带线路接口（110,310）和用于连接到线对的射频线路接口（700,800） 201）。 每个站还包括用于在基带和rf之间频移数据信道的多路复用器和解复用器设备（500,600）。 在数据通道中使用幅度调制和半双工传输。 电话状态和控制信息，包括振铃和应答控制，经由数据信道在控制器（160,360）之间交换。 远程站（222）使通过数据通道控制主站（221）与进入的电话线（201,202）相互作用的公用设备所需的设备的数量最小化。