公开(公告)号：US20090052653A1

公开(公告)日：2009-02-26

申请号：US12099172

申请日：2008-04-08

申请人： Lin-Kun DING ,  Shih-Fang WONG ,  Xiang-Ping ZHOU ,  Jiang-Feng SHAN ,  Gui-Rong ZHOU

发明人： Lin-Kun DING ,  Shih-Fang WONG ,  Xiang-Ping ZHOU ,  Jiang-Feng SHAN ,  Gui-Rong ZHOU

IPC分类号： H04M1/00

CPC分类号： H04M1/66

摘要： A telephone line monitoring device is connected to a telephone line and adjacent to a telephone device using the telephone line. The telephone line monitoring device includes a rectifying circuit for generating a corresponding direct current voltage according to an effective voltage of the telephone line; a first controller for generating a first control signal when the direct current voltage is lower than a predetermined voltage; a second controller for detecting an operating state of the telephone device and generating a second control signal when the telephone device is operated; a load booster for pulling down the effective voltage of the telephone line when enabled; and a first switch circuit for disabling the load booster whenever receiving the second control signal, and enabling the load booster when receiving the first control signal while not receiving the second control signal. A monitoring method and a telephone device are also provided.

摘要翻译： 电话线监视装置使用电话线连接到电话线并且与电话装置相邻。 电话线监视装置包括：整流电路，用于根据电话线的有效电压产生相应的直流电压; 第一控制器，用于当直流电压低于预定电压时产生第一控制信号; 第二控制器，用于在电话设备操作时检测电话设备的操作状态并产生第二控制信号; 用于在启用时拉低电话线的有效电压的负载增强器; 以及第一开关电路，用于在接收到所述第二控制信号时禁用所述负载增强器，以及在接收到所述第一控制信号而不接收所述第二控制信号的情况下使能所述负载增强器。 还提供监视方法和电话装置。