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1. 发明授权

US5768341A Communications channel testing arrangement 失效
标题翻译：通信通道测试安排
公开(公告)号：US5768341A
公开(公告)日：1998-06-16
申请号：US436318
申请日：1995-08-17
申请人： Dennis Malcolm Pryor , Michael Challis , Luc Van Leeuw
发明人： Dennis Malcolm Pryor , Michael Challis , Luc Van Leeuw
IPC分类号： H03K17/00 , H03K20060101 , H03K17/687 , H04M3/30 , H04Q3/42 , H04M1/24 , H04M3/08 , H04M3/22
CPC分类号： H04M3/301 , H03K17/6874 , H04M2201/14
摘要： A switching arrangement that can be connected in a communications channel that comprises a pair of lines between sets of terminal equipment, which comprises: (i) a series switch (1,2) for connection in each of the lines; (ii) a shunt switch for connection between the lines; and (iii) a control circuit (5) that can actuate the series switches (1,2) and can actuate the shunt switch on receipt of a signal sent along the channel: wherein the control circuit (5) can actuate the shunt switch and the series switches (1,2) on receipt of one or more signals but the shunt switch will remain closed over a different time period than that during which the series switches remain open, in order to allow different tests to be performed on the channel, and wherein one or more of the switches comprises a solid state switch.
摘要翻译： PCT No.PCT / GB93 / 02312 Sec。 371日期：1995年8月17日 102（e）日期1995年8月17日PCT 1993年11月10日PCT公布。出版物WO94 / 11948 PCT 日期1994年5月26日一种可以连接在包括终端设备组之间的一对线路的通信信道中的切换装置，其包括：（i）用于在每条线路中连接的串联开关（1,2）（ii）用于线路之间连接的分流开关; 以及（iii）可以致动所述串联开关（1,2）并且可以在接收到沿着所述通道发送的信号时致动所述分流开关的控制电路（5）：其中所述控制电路（5）可以致动所述分流开关和在接收到一个或多个信号时，串联开关（1,2），但分流开关将在与串联开关保持断开的不同时间段内保持关闭，以便允许在通道上执行不同的测试，并且其中一个或多个开关包括固态开关。

2. 发明授权

US5651048A Communication channel switching arrangement 失效
标题翻译：通信通道切换布置
公开(公告)号：US5651048A
公开(公告)日：1997-07-22
申请号：US392930
申请日：1995-02-24
申请人： Luc Van Leeuw
发明人： Luc Van Leeuw
IPC分类号： H04M3/18 , H04M3/30 , H04M1/24 , H04M3/08 , H04M3/22
CPC分类号： H04M3/301 , H04M3/18
摘要： A maintenance termination unit (MTU) for use in telephone circuits. The MTU comprises a switching arrangement which can be connected in a communications channel, the communications channel comprising a pair of lines. The switching arrangement is connected between a set of exchange-side terminal equipment and a set of subscriber-side terminal equipment. The arrangement comprises first and second line switches, each of which is series connected in one of the lines. Each line switch comprises a control terminal, and has a closed state in which it will pass normal line current, and an open state in which it will pass at most a reduced line current. The arrangement also comprises a control circuit which is connected to the channel between the line switches and the subscriber-side terminal equipment. The control circuit comprises: a charge reservoir which is connected between the lines; a reservoir charging switch which is connected in series with the charge reservoir and controls the charging of the reservoir in response to a signal on the lines; and a reservoir discharging switch which is controlled by a signal on the lines and will allow the reservoir, when charged, to energize the control terminals of the line switches so that, when the line switches are opened by the control circuit, the line switches can be maintained in an open state for a period of time by discharging the reservoir.
摘要翻译： PCT No.PCT / GB93 / 01717 Sec。 371日期：1995年2月24日 102（e）1995年2月24日PCT PCT 1993年8月13日PCT公布。出版物WO94 / 05108 日期1994年3月3日用于电话线路的维护终端单元（MTU）。 MTU包括可以连接在通信信道中的交换装置，通信信道包括一对线路。交换装置连接在一组交换侧终端设备和一组用户侧终端设备之间。该装置包括第一和第二线路开关，其中的每一个在一条线路中串联连接。每个线路开关包括控制端子，并且具有闭合状态，在该状态下，它将通过正常线路电流，并且处于其最多将通过降低的线路电流的打开状态。该装置还包括连接到线路交换机和用户侧终端设备之间的信道的控制电路。控制电路包括：连接在线路之间的电荷贮存器; 储存器充电开关，其与充电储存器串联连接并响应于线路上的信号控制储存器的充电; 以及由线路上的信号控制的储存器排放开关，并且当充电时允许储存器激励线路开关的控制端子，使得当线路开关由控制电路断开时，线路开关可以通过排放水库维持一段时间的开放状态。

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