公开(公告)号：US4055808A

公开(公告)日：1977-10-25

申请号：US688330

申请日：1976-05-20

申请人： Jerry L. Holsinger ,  David L. Lyon ,  David E. Williams ,  Frank B. Lezotte ,  Don I. Falkenstein

发明人： Jerry L. Holsinger ,  David L. Lyon ,  David E. Williams ,  Frank B. Lezotte ,  Don I. Falkenstein

IPC分类号： H04L1/24 ,  H04L12/26 ,  H04B1/72

CPC分类号： H04L43/50 ,  H04L1/24 ,  H04L12/2697

摘要： A testing facility for a data communications network including modulators and demodulators, or modems, at central sites, at intermediate, or hubbing, sites, and at remote sites. Hubbing site testing units connect to respective host modems at the intermediate sites. The central testing unit transmits control words containing line address, drop address, and command characters. A configuration control circuit in each hubbing site testing unit generates signals that designate the particular location of the testing unit at the hubbing site. A validation circuit in each testing unit enables the testing unit to respond to the command character if two valid control words are received in succession. Thereafter the testing unit transmits back to the central testing unit signals in response to the test defined by the command character. If the line and drop address characters do not designate that specific hubbing site testing unit, it repeats the command to other units as an outbound request and repeats inbound responses to the central testing unit. Circuitry for substituting command characters under special conditions and for altering the inbound responses are also included.

摘要翻译： 包括调制器和解调器或调制解调器在内的数据通信网络的测试设施，位于中央站点，中间站点或集线站，以及远程站点。 Hubbing站点测试单元连接到中间站点的相应主机调制解调器。 中央测试单元发送包含行地址，丢弃地址和命令字符的控制字。 每个轮毂现场测试单元中的配置控制电路产生指示测试单元在轮毂部位的特定位置的信号。 如果接收到两个有效的控制字，每个测试单元中的验证电路使测试单元能够响应命令字符。 此后，测试单元响应于由命令字符定义的测试发送回中央测试单元的信号。 如果线路和分机地址字符不指定该特定的集线点测试单元，则重复对其他单元的命令作为出站请求，并重复对中央测试单元的入站响应。 还包括在特殊条件下替换命令字符并更改入站响应的电路。

公开(公告)号：US4055733A

公开(公告)日：1977-10-25

申请号：US690884

申请日：1976-05-28

申请人： Jerry L. Holsinger ,  David E. Williams ,  Frank B. Lezotte ,  Don I. Falkenstein

发明人： Jerry L. Holsinger ,  David E. Williams ,  Frank B. Lezotte ,  Don I. Falkenstein

IPC分类号： H04B3/48 ,  H04B3/46

CPC分类号： H04B3/48

摘要： A device for measuring the power of analog signals on telephone lines in a data communications network. A selection circuit couples a selected analog signal from one of the telephone lines to a measuring circuit. A full-wave rectifier and a low pass filter process and convey the selected signal to a plurality of open-loop comparators. Each comparator produces a binary signal that indicates whether the selected signal is greater or less than a reference power that corresponds to a predetermined power level. Each comparator energizes an inverter and driver that in turn energizes a light-emitting diode thereby to indicate the line signal power visually. However, the drivers are interconnected so only one light-emitting diode is energized at any given time. A blanking circuit disables the light-emitting diodes when rapid signal level changes occur. A self-testing circuit includes a damped oscillator for testing all the circuitry in the measuring device.

摘要翻译： 一种用于测量数据通信网络中电话线上的模拟信号功率的装置。 选择电路将所选择的模拟信号从电话线之一耦合到测量电路。 全波整流器和低通滤波器处理，并将所选择的信号传送到多个开环比较器。 每个比较器产生二进制信号，其指示所选择的信号是否大于或小于对应于预定功率电平的参考功率。 每个比较器激励逆变器和驱动器，其反过来激励发光二极管，从而可视地指示线路信号功率。 然而，驱动器是互连的，所以在任何给定的时间只有一个发光二极管被激励。 当发生快速信号电平变化时，消隐电路禁用发光二极管。 自检电路包括用于测试测量装置中所有电路的阻尼振荡器。