公开(公告)号：US4385336A

公开(公告)日：1983-05-24

申请号：US213010

申请日：1980-12-04

申请人： Tetsuo Takeshita ,  Junjiro Kitano ,  Koichi Hagishima

发明人： Tetsuo Takeshita ,  Junjiro Kitano ,  Koichi Hagishima

IPC分类号： H02H9/02 ,  H04M3/30 ,  H04M19/00 ,  H02H9/08 ,  H04M3/08

CPC分类号： H04M3/30 ,  H04M19/001

摘要： This invention relates to a current supplying circuit for supplying a current to a terminal apparatus through a ring line and a tip line which are connected through resistance elements to a potential source and ground, respectively. This current supplying circuit includes respective detectors for generating first and second detection signals of amplitudes proportional to the currents flowing in the ring and tip lines, respectively, a circuit for generating a reference signal, and a comparator for comparing the signal difference between the first and second detection signals and the reference signal so as to produce a signal in accordance with the compared result, thus a shorted-to-ground fault on the ring line or tip line being detected by monitoring the signal produced in accordance with the compared result. After the shorted-to-ground fault is detected, the current supplying circuit is protected from breakdown.

摘要翻译： 本发明涉及一种电流供应电路，用于通过环形线路和尖端线路向终端设备提供电流，该电流线路分别通过电阻元件连接到电位源和接地。 该电流供给电路包括各自的检测器，用于分别产生与在环路和尖端线路中流动的电流成比例的振幅的第一和第二检测信号，用于产生参考信号的电路，以及比较器，用于比较第一和第 第二检测信号和参考信号，以根据比较结果产生信号，从而通过监视根据比较结果产生的信号来检测环形线或尖端线上的短路对地故障。 在检测到短路对地故障之后，保护电流供应电路不受破坏。

公开(公告)号：US4864558A

公开(公告)日：1989-09-05

申请号：US121967

申请日：1987-11-17

申请人： Hitoshi Imagawa ,  Shigeo Urushidani ,  Koichi Hagishima

发明人： Hitoshi Imagawa ,  Shigeo Urushidani ,  Koichi Hagishima

IPC分类号： H04L12/931 ,  H04L12/937 ,  H04L12/947

CPC分类号： H04L49/25 ,  H04L49/254 ,  H04L49/40

摘要： In a self-routing switch which comprises a plurality of switching stages inserted between pluralities of input and output lines and cascade-connected by pluralities of input and output links, each switching stage includes a plurality of cascade-connected store/switch elements. Each store/switch element of each switching stage outputs an information data input thereto from the corresponding input link to the corresponding output link or shifts the input information data through a predetermined number of cascade-connected elements and outputs it to the corresponding output link, in accordance with a portion of routing information contained in the input information data, which portion corresponds to the switching stage.

摘要翻译： 在包括多个输入和输出线之间插入并由多个输入和输出链路级联连接的多个开关级的自路由开关中，每个开关级包括多个级联连接的存储/开关元件。 每个切换级的每个存储/切换元件从相应的输入链路将输入的信息数据输出到对应的输出链路，或者通过预定数量的级联连接的元件移位输入信息数据，并将其输出到相应的输出链路， 根据包含在输入信息数据中的路由信息​​的一部分，该部分对应于切换阶段。