公开(公告)号：US20040090727A1

公开(公告)日：2004-05-13

申请号：US10293141

申请日：2002-11-13

申请人： ADTRAN, INC.

发明人： Scott L. Smith ,  Steven M. Robinson

IPC分类号： H02H003/00

CPC分类号： H04M3/18 ,  H02H9/025

摘要： A central office transceiver-installed current limiter and regulator provides fault isolation and transient load isolation in a wireline communication network, having multiple transceivers connected by respective span-powered wirelines to a common power source at the central office. Using a current-sense resistor and controlled switch in series with the wireline, the current-limiter and regulator processes input electrical power from the power source prior to coupling that power to a remote transceiver. To prevent overheating and substantial power dissipation in the current-limiting circuitry in the event of a prolonged fault condition, the controlled switch is alternately turned on and off.

摘要翻译： 中心局收发器安装的限流器和调节器在有线通信网络中提供故障隔离和瞬时负载隔离，其具有通过相应的跨功率有线线路连接到中心局的公共电源的多个收发器。 使用电流检测电阻和与电缆串联的受控开关，电流限制器和调节器在将该功率耦合到远程收发器之前，将来自电源的输入电功率进行处理。 为了防止在长时间故障情况下限流电路中的过热和实质的功率消耗，受控开关交替地接通和关断。

公开(公告)号：US20030030327A1

公开(公告)日：2003-02-13

申请号：US10212956

申请日：2002-08-06

申请人： ADTRAN, INC.

发明人： Steven M. Robinson ,  Ralph R. Boudreaux JR. ,  John S. McGary

IPC分类号： H02J001/00

CPC分类号： H02J1/102 ,  Y10T307/406 ,  Y10T307/453 ,  Y10T307/461

摘要： A electrical power control mechanism ensures start-up of all telecommunication devices (repeaters and a remote terminal) along a span-powered wireline. Input voltage start-up thresholds of power control circuits at the devices are higher than the steady-state voltage across the repeater closest to the span supply, when the span voltage is at a minimum DC wireline voltage that sustains operation of all devices. The maximum input voltage start-up threshold of a device is less than the maximum voltage that could be applied during start-up, and the remote terminal has an input voltage start-up threshold value higher than that of any repeater. The maximum standby current of each device is specified, and input power is limited to its steady state maximum during start-up.

摘要翻译： 电力控制机构确保沿跨度电力线路启动所有电信设备（中继器和远程终端）。 当跨度电压处于维持所有器件运行的最小DC有线电压时，器件上的功率控制电路的输入电压启动阈值高于最靠近跨度电源的中继器两端的稳态电压。 器件的最大输入电压启动阈值小于启动期间可能施加的最大电压，远程端子的输入电压启动阈值高于任何中继器。 指定每个设备的最大待机电流，并且在启动期间将输入功率限制在其稳态最大值。

公开(公告)号：US20040190686A1

公开(公告)日：2004-09-30

申请号：US10403308

申请日：2003-03-31

申请人： ADTRAN, INC.

发明人： Bradley Dwayne Tidwell ,  Steven M. Robinson ,  James Michael Hawkins

IPC分类号： H04M001/24 ,  H04M003/08 ,  H04M003/22

CPC分类号： H04M3/304 ,  H04M3/12 ,  H04M3/18

摘要： Whether or not protection circuitry for a span-powered remote digital subscriber loop unit is properly connected to earth ground is determined by the deliberate assertion and detection of a ground fault from a central office line card location. The span-powered remote unit is augmented to place a controllable conduction path in circuit with the span-powered loop and an earth ground pin. If the earth ground pin has been properly connected to earth ground, applying the conductive path will place a ground fault on the span, which is detected by a ground fault detector within the central office line card. If the ground fault detector does not detect a ground fault in response to the application of the conductive path, the line card forwards a negative ground fault event message to a test center, so that a service technician may be dispatched to the remote unit to correct the problem.

摘要翻译： 跨度供电的远程数字用户回路单元的保护电路是否正确连接到地面是否由有意断言和从中心局线路卡位置检测到接地故障来确定。 跨度供电的遥控单元被增加，以将可控传导路径放置在与跨度供电环路和接地引脚的电路中。 如果接地脚已经正确连接到地面，则施加导电路径将在中心局线路卡中的接地故障检测器检测到的跨度上发生接地故障。 如果接地故障检测器不响应于导电路径的应用来检测到接地故障，则线卡将负接地故障事件消息转发到测试中心，以便可以将维修技术人员发送到远程单元以进行校正 问题。

公开(公告)号：US20030185385A1

公开(公告)日：2003-10-02

申请号：US10114531

申请日：2002-04-01

申请人： ADTRAN, INC.

发明人： Ralph R. Boudreaux JR. ,  John S. McGary ,  Steven M. Robinson ,  John B. Wilkes JR.

IPC分类号： H04M001/00 ,  H04M009/00

CPC分类号： H04M19/02

摘要： A power management circuit for a remote access platform extracts power from a wireline for powering a ring generator that generates a ringing voltage signal that is distributed to a plurality of subscriber circuits. A power-limited voltage converter steps up the wireline voltage to a higher nullisolatingnull voltage, charging a capacitor coupled to the ring generator. A monitor circuit reduces the power that the power-limited voltage converter can draw, if the wireline voltage drops too low. This prevents the wireline voltage from collapsing should the remote terminal be deployed at a distance from wireline voltage source (the central office) greater than its specified capability.

摘要翻译： 用于远程接入平台的电源管理电路从有线线路提取功率，为环形发生器供电，该环形发生器产生分配给多个用户电路的振铃电压信号。 功率受限的电压转换器将有线电压升高到更高的“隔离”电压，为耦合到环形发生器的电容器充电。 如果有线电压降得太低，监控电路可以降低功率限制电压转换器可以吸收的功率。 如果远程终端远离有线电压源（中心局）远远超过其指定的能力，则可防止有线电压崩溃。

公开(公告)号：US20030174451A1

公开(公告)日：2003-09-18

申请号：US10098097

申请日：2002-03-13

申请人： ADTRAN, INC.

发明人： Ralph R. Boudreaux JR. ,  John S. McGary ,  Steven M. Robinson

IPC分类号： H02H003/00

CPC分类号： H04M3/18

摘要： A ground fault current-limiting circuit for limiting telecommunication wireline voltage and ground fault current to prescribed safety parameters has a ground fault current sense resistor and associated line voltage control circuit installed in a ground-coupling link to the center tap of the output winding of a bipolar voltage converter's output transformer. The control circuit compares ground fault current of either polarity flowing through the sense resistor to a prescribed value. In response to this current limit being exceeded, the control circuit produces an output signal that causes the power source to reduce its output voltage so that the ground fault current will drop to within acceptable limits.

摘要翻译： 用于将通信电缆电压和接地故障电流限制到规定的安全参数的接地故障限流电路具有接地故障电流检测电阻器和相关的线路电压控制电路，其安装在与输出绕组的输出绕组的中心抽头的地耦合链路中 双极性电压转换器输出变压器。 控制电路将流过检测电阻器的任一极性的接地故障电流与规定值进行比较。 响应于超过该电流限制，控制电路产生使电源减小其输出电压的输出信号，使得接地故障电流将下降到可接受的限度内。