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6 条记录 (耗时 0.017 秒)

    Battery feed circuit for subscriber line
    2.
    发明授权
    Battery feed circuit for subscriber line 失效
    用户线电池供电电路

    公开(公告)号：US4631366A

    公开(公告)日：1986-12-23

    申请号：US736345

    申请日：1985-05-21

    申请人： Kenji Takato ,  Mitsutoshi Ayano ,  Kiyoshi Shibuya ,  Yoshimi Iijima ,  Atsuo Serikawa

    发明人： Kenji Takato ,  Mitsutoshi Ayano ,  Kiyoshi Shibuya ,  Yoshimi Iijima ,  Atsuo Serikawa

    IPC分类号： H04M19/00

    CPC分类号： H04M19/005

    摘要： A battery feed circuit for a subscriber line includes first and second feed circuit parts, each supplying a constant current to a corresponding subscriber line. The first and second feed circuit parts are provided with at least one of a common mode noise suppressor and a power source noise suppressor. The common mode noise suppressor includes first and second reference voltage output circuits and an intermediate voltage output circuit to produce the voltage between the first and second subscriber lines and superpose the same onto the first and second reference voltages. The power source noise suppressor functions to cancel the power source noise voltage at the output, of the first and second feed circuit parts.

    摘要翻译： 用于用户线路的电池馈电电路包括第一和第二馈电电路部分，每个馈电电路部分向相应的用户线路提供恒定电流。 第一和第二馈电电路部分设置有共模噪声抑制器和电源噪声抑制器中的至少一个。 共模噪声抑制器包括第一和第二参考电压输出电路和中间电压输出电路，以产生第一和第二用户线之间的电压并将其叠加到第一和第二参考电压上。 电源噪声抑制器用于消除第一和第二馈电电路部分的输出端的电源噪声电压。

    Method and device for two-way communication network
    4.
    发明授权
    Method and device for two-way communication network 失效
    双向通信网络的方法和设备

    公开(公告)号：US5960005A

    公开(公告)日：1999-09-28

    申请号：US683361

    申请日：1996-07-18

    申请人： Umihiko Moteki ,  Masaharu Matsumoto ,  Yutaka Suzuki ,  Atsuo Serikawa ,  Yuji Maeda ,  Yoshihide Morimoto ,  Takeshi Uehara

    发明人： Umihiko Moteki ,  Masaharu Matsumoto ,  Yutaka Suzuki ,  Atsuo Serikawa ,  Yuji Maeda ,  Yoshihide Morimoto ,  Takeshi Uehara

    IPC分类号： H04Q11/04 ,  H04B17/00

    CPC分类号： H04Q11/04 ,  H04Q2213/13012 ,  H04Q2213/1308 ,  H04Q2213/13103 ,  H04Q2213/13106 ,  H04Q2213/1316 ,  H04Q2213/13174 ,  H04Q2213/13176 ,  H04Q2213/13199 ,  H04Q2213/13204 ,  H04Q2213/13205 ,  H04Q2213/13209 ,  H04Q2213/13216 ,  H04Q2213/1322 ,  H04Q2213/13292 ,  H04Q2213/1332 ,  H04Q2213/1336 ,  H04Q2213/13389

    摘要： A method of an automatic adjustment of a carrier level is used for a system having a center device, a communication line extending from the center device, and at least one communication-terminal device connected to the communication line. The system conducts two-way communication of data signals on the communication line based on a predetermined multiplexing scheme. The method includes the steps of periodically transmitting a carrier-level-measurement message from the center device to the communication line for each high-frequency channel used for the two-way communication, the carrier-level-measurement message being sent via a first channel different from channels used for communication and control, transmitting a reply message in response to the carrier-level-measurement message from a communication-terminal device to the center device via a second channel different from the channels used for communication and control, transmitting a carrier-level-adjustment message from the center device to the communication line via the first channel, the carrier-level-adjustment message containing level-adjustment information based on a carrier level of the reply message received by the center device, and adjusting a carrier level of the communication-terminal device based on the level-adjustment information of the carrier-level-adjustment message received by the communication-terminal device.

    摘要翻译： 对于具有中心设备的系统，从中心设备延伸的通信线路和连接到通信线路的至少一个通信终端设备的系统，使用对载波电平进行自动调整的方法。 该系统基于预定的复用方案在通信线路上进行数据信号的双向通信。 该方法包括以下步骤：对于用于双向通信的每个高频信道，从中心设备周期性地向通信线路发送载波级测量消息，载波级测量消息经由第一信道发送 不同于用于通信和控制的信道，经由不同于用于通信和控制的信道的第二信道，将响应于载波级测量消息的应答消息从通信终端设备发送到中心设备，发送载波 - 通过第一信道从中心设备到通信线路的电平调整消息，载波级调整消息包含基于由中心设备接收的应答消息的载波电平的电平调整信息，以及调整载波电平 基于由所接收的载波电平调整消息的电平调整信息 通信终端设备。

    Calling signal transmission apparatus
    5.
    发明授权
    Calling signal transmission apparatus 失效
    呼叫信号传输装置

    公开(公告)号：US4748659A

    公开(公告)日：1988-05-31

    申请号：US904495

    申请日：1986-09-08

    申请人： Kiyoshi Kasahara ,  Kenichi Ogawa ,  Kenji Takato ,  Shoji Nojiri ,  Yoshimi Iijima ,  Yasuo Miyazaki ,  Mitsutoshi Ayano ,  Kiyoshi Shibuya ,  Atsuo Serikawa

    发明人： Kiyoshi Kasahara ,  Kenichi Ogawa ,  Kenji Takato ,  Shoji Nojiri ,  Yoshimi Iijima ,  Yasuo Miyazaki ,  Mitsutoshi Ayano ,  Kiyoshi Shibuya ,  Atsuo Serikawa

    IPC分类号： H04M19/02

    CPC分类号： H04M19/026

    摘要： In a calling signal transmitting apparatus, a ring trip equipment, including a ring trip detecting circuit for detecting a ring trip signal in response to an off-hook operation of the telephone set during a signal state of an intermittent ringing signal and a loop detecting circuit for detecting a loop signal in response to an off-hook operation of the telephone set during a nonsignal state of the intermittent ringing signal. Also included are a logical OR gate circuit, for providing, as a status signal, a logical sum of the ring trip signal and the loop signal, and a supervising circuit for supervising the status signal. When an incoming call is being received by the telephone set, when the supervising circuit detects an off-hook state in the status signal, the supervising circuit stops the transmission of a ringing signal to the telephone set, and carries out a second supervising operation for supervising the status signal, and, if an on-hook state is detected during the second supervising operation, said supervising circuit again transfers the ringing signal to the telephone set.

    摘要翻译： 在呼叫信号发送装置中，环路跳闸设备包括环路跳闸检测电路，用于在间歇振铃信号的信号状态期间响应于电话机的摘机操作来检测环路跳闸信号，以及环路检测电路 用于在间歇振铃信号的非信号状态期间响应于电话机的摘机操作来检测回路信号。 还包括逻辑或门电路，用于提供环路跳闸信号和环路信号的逻辑和作为状态信号，以及用于监视状态信号的监控电路。 当电话机接收到来电时，当监控电路在状态信号中检测到摘机状态时，监控电路停止向电话机发送振铃信号，并执行第二监视操作 监视状态信号，并且如果在第二监视操作期间检测到挂机状态，则所述监控电路再次将振铃信号传送到电话机。

    Communication-line-quality measuring system using a conventional signal frame structure
    6.
    发明授权
    Communication-line-quality measuring system using a conventional signal frame structure 失效
    通信线路质量测量系统采用传统的信号帧结构

    公开(公告)号：US6028845A

    公开(公告)日：2000-02-22

    申请号：US754183

    申请日：1996-11-22

    申请人： Atsuo Serikawa ,  Yasuhiro Saito ,  Yuji Maeda ,  Satoshi Kasuya

    发明人： Atsuo Serikawa ,  Yasuhiro Saito ,  Yuji Maeda ,  Satoshi Kasuya

    IPC分类号： H04J3/14 ,  G08C15/00 ,  H04B3/46 ,  H04B17/00 ,  H04J3/06 ,  H04J3/24 ,  H04L1/24 ,  H04L7/00

    CPC分类号： H04L1/243

    摘要： A communication-line-quality measuring system includes transmission and terminal equipment. Transmission equipment has a first frame assembling part transmitting a down-link multiplexed frame signal to a down-link line having a first frequency, and a first frame disassembling part disassembling an up-link multiplexed frame signal transmitted through an up-link line having a second frequency. Terminal equipment has a second frame disassembling part disassembling the down-link multiplexed frame signal, and a second frame assembling part transmitting the up-link multiplexed frame signal obtained by frame-multiplexing an output signal of the subscriber unit with a control signal, to the up-link line. A pattern generation part in the first frame assembling part provides a test signal to an available channel of signal frames in the down-link multiplexed frame signal. A loop-back part between the second frame disassembling part and the frame assembling part loops back the test signal derived from the down-link multiplexed frame signal in the second frame disassembling part to the second frame assembling part. The second frame assembling part provides the test signal in the up-link multiplexed frame signal to transmit to the transmission equipment. A comparing part in the transmission equipment compares the test signal in the up-link multiplexed frame signal, which is looped back by a control of the loop-back part, with a reference signal the same as the test signal generated in the pattern generation part.

    摘要翻译： 通信线质量测量系统包括传输和终端设备。 传输设备具有将下行链路多路复用帧信号发送到具有第一频率的下行链路线的第一帧组装部分，以及分解通过上行链路线路发送的上行链路多路复用帧信号的第一帧拆卸部分， 第二频率。 终端设备具有拆卸下行链路多路复用帧信号的第二帧拆卸部分，以及将通过将用户单元的输出信号进行帧多路复用而获得的上行链路复用帧信号的控制信号发送到第二帧组装部分 上行线。 第一帧组合部分中的模式生成部分向下行链路复用帧信号中的信号帧的可用信道提供测试信号。 第二帧分解部与帧组装部之间的环回部将从第二帧分解部的下行链路复用帧信号导出的测试信号回送到第二帧组装部。 第二帧组装部分在上行链路多路复用帧信号中提供测试信号，以传输到传输设备。 传输设备中的比较部分将通过环回部分的控制环回的上行链路复用帧信号中的测试信号与在模式生成部分中生成的测试信号相同的参考信号进行比较 。