公开(公告)号：US5940374A

公开(公告)日：1999-08-17

申请号：US706784

申请日：1996-09-03

申请人： David L. Mack ,  Jason F. McCullough ,  Stacy M. Murphree

发明人： David L. Mack ,  Jason F. McCullough ,  Stacy M. Murphree

IPC分类号： H04J3/14 ,  H04J1/16

CPC分类号： H04J3/14

摘要： A D4 channel bank data bus monitoring scheme automatically determines if a channel unit connector slot is occupied, without having to gain physical access to the interior of the channel bank cabinet and inspect the channel bank's backplane slot positions. To this end, for a respective channel unit connector slot the channel bank's transmit data bus, which is initially pulled high via a pull-up resistor, is monitored for an all `1`s state. If the data on the bus is not all `1`s, then it is inferred that a channel unit is installed. If an all `1`s state is not detected, then, during the next time slot for that channel unit, the bus is decoupled from the pull-up resistor and coupled instead to a `soft` pull-down resistor. If the data on the bus is now all `0`s, it is inferred that the previously read all `1`s condition was due to the fact that no channel unit is installed, and the channel unit connector slot is declared as empty. However, if the data on the TDATA bus is not all `0`s, it is inferred that the previously read all `1`s condition was actual data asserted by an installed channel unit, and the channel unit connector slot is declared as occupied.

摘要翻译： D4通道组数据总线监控方案自动确定通道单元连接器插槽是否被占用，而无需获得对通道组机柜内部的物理访问并检查通道组的背板插槽位置。 为此，对于相应的通道单元连接器插槽，通过上拉电阻最初拉高的通道组的发送数据总线被监视1'状态。 如果总线上的数据不是全部为1，则推断出通道单元已安装。 如果未检测到全'1'状态，则在该通道单元的下一个时隙期间，总线与上拉电阻去耦，而是耦合到“软”下拉电阻。 如果总线上的数据现在全为0，则推断先前读取的所有'1'状态是由于没有安装通道单元，并且通道单元连接器插槽被声明为空。 然而，如果TDATA总线上的数据不是全部为0，则推断先前读取的所有'1'条件是已安装通道单元所确定的实际数据，并将通道单元连接器插槽声明为已占用。

公开(公告)号：US5970051A

公开(公告)日：1999-10-19

申请号：US778078

申请日：1997-01-02

申请人： David L. Mack ,  Michael W. Elliott ,  Clifford Hall

发明人： David L. Mack ,  Michael W. Elliott ,  Clifford Hall

IPC分类号： H04J3/14 ,  H04J1/16

CPC分类号： H04J3/14

摘要： The problem of digital data corruption heat occurs when an analog card is inserted into a card/time slot of a D4 channel bank is effectively remedied by sampling and analyzing the channel bank's transmit enable (TNEN) lead for successive frames of time slots. Unless analyzed TNEN lead samples of a channel unit time slot of interest derived over successive frames have the same logic state associated with an analog channel unit, the PCM data lead remains default-coupled to a digital data transmission lead. This prevents PCM-encoded spurious noise on the analog PAM lead from being erroneously asserted in place of serialized digital data bits that should have been passed directly from the digital data bus to the PCM bus.

摘要翻译： 当将模拟卡插入到D4信道组的卡/时隙中时，会发生数字数据损坏热的问题，通过对连续的时隙帧进行采样和分析信道组的发送使能（TNEN）线来有效地进行纠正。 除非分析在连续帧上导出的通道单位时隙的TNEN引线样本具有与模拟通道单元相关联的相同逻辑状态，否则PCM数据引线保持默认耦合到数字数据传输引线。 这样可以防止PCM编码的模拟PAM引脚上的杂散噪声被错误地置为代替已经从数字数据总线直接传递到PCM总线的串行数字数据位。

公开(公告)号：US06396844B1

公开(公告)日：2002-05-28

申请号：US09169610

申请日：1998-10-09

申请人： David L. Mack ,  David R. Krueger ,  John B. Bartell

发明人： David L. Mack ,  David R. Krueger ,  John B. Bartell

IPC分类号： H04L1228

CPC分类号： H04Q11/04 ,  H04J3/04 ,  H04J3/08 ,  H04Q2213/13003 ,  H04Q2213/13039 ,  H04Q2213/13076 ,  H04Q2213/13103 ,  H04Q2213/13106 ,  H04Q2213/13191 ,  H04Q2213/13209 ,  H04Q2213/13292 ,  H04Q2213/1332 ,  H04Q2213/13322

摘要： To provide either or both multiplexed and non-multiplexed (loop repeater) mode communications in the same equipment shelf between a network and plural subscriber circuits, a multi-mode backplane architecture includes a network interface multiplexer that provides time division multiplexed signal connectivity and point-to-point multiplexed signal connectivity between the network and line circuit access modules, to which the subscriber circuits are selectively ported. Each of a plurality of non-multiplexed interface connectors is configured for external connection to non-multiplexed communication links of the network and non-multiplexed communication links of the subscriber circuits. A plurality of access module card slots receive line circuit access modules that are individually programmable to provide a selected one of a plurality of diverse modes of telecommunication connectivity between the network and a subscriber circuit. The line circuit access modules have input/output multiplexers that selectively provide connectivity between its signal processor line and signal paths of the network interface multiplexer, and signal paths of a plurality of point-to-point communication ports of non-multiplexed interface connectors.

摘要翻译： 为了在网络和多个用户电路之间的同一设备机架中提供复用和非复用（环路中继器）模式通信中的一个或两者，多模式背板架构包括网络接口多路复用器，其提供时分多路复用的信号连接和点对多点 网络和线路电路访问模块之间的点到点多路复用信号连接，用户电路选择性地移植到该模块。 多个非多路复用接口连接器中的每一个被配置用于外部连接到网络的非复用通信链路和用户电路的非复用通信链路。 多个访问模块卡槽接收线路电路访问模块，其可单独编程以提供网络和用户电路之间的电信连接的多个不同模式中的所选择的一种。 线路电路访问模块具有输入/输出多路复用器，其选择性地提供其信号处理器线路与网络接口多路复用器的信号路径之间的连接以及非复用接口连接器的多个点对点通信端口的信号路径。

公开(公告)号：US06347809B1

公开(公告)日：2002-02-19

申请号：US09664452

申请日：2000-09-18

申请人： David L. Mack

发明人： David L. Mack

IPC分类号： B62B914

CPC分类号： B62D25/188

摘要： A stabilizer for flexible guards provides for the stabilization and control of flexible flaps, brush type devices, and the like as used in motor vehicle mud flaps, car washes, and in conveyor systems. The present stabilizer includes a rigid structure which completely surrounds the guard(s), and which is loosely and flexibly suspended from an overlying structure. The rigid portion of the device is preferably constructed of polyvinyl chloride (PVC) pipe or tubing, or any other suitable elongate structural material (e.g., electrical metal tubing, pipe, and/or extruded metallic or non-metallic shapes, such as Tees, channels, angles, etc.). The rigid structure is preferably suspended from the overlying structure by chains at at least both ends of the device, with an additional chain(s) optionally installed at the center area of the device. The chains (or other suitably flexible attachments) provide longitudinal, lateral, and vertical movement or compliance in the event the stabilizer or stabilized guard strikes or is struck by another object, thus precluding damage to the stabilizer and/or transfer of the impact and resulting damage to the vehicle or attachment structure. The rigid portion of the device which surrounds the guard, may be weighted in order to adjust the periodic frequency of the suspended assembly, to avoid any resonant frequencies with the guard with which the device is installed. Width adjustment may be provided by forming the elongate lateral members of telescoping components.

摘要翻译： 用于柔性防护装置的稳定器提供用于机动车辆挡泥板，洗车和输送机系统中使用的柔性襟翼，刷式装置等的稳定和控制。 本稳定器包括完全围绕护罩的刚性结构，并且松动地和柔性地悬挂在上覆结构上。 装置的刚性部分优选由聚氯乙烯（PVC）管或管或任何其它合适的细长结构材料（例如电气金属管，管和/或挤出的金属或非金属形状，例如Te， 通道，角度等）。 刚性结构优选地通过在装置的至少两端处的链条从上覆结构悬挂，并且附加链可选地安装在装置的中心区域。 在稳定器或稳定的防护件撞击或被另一物体撞击的情况下，链条（或其他适当柔性的附件）提供纵向，横向和垂直的运动或柔顺性，从而排除了对稳定器的损害和/或冲击的转移，并导致 对车辆或附件结构的损坏。 围绕防护件的装置的刚性部分可以被加权，以便调整悬挂组件的周期频率，以避免与装置安装的防护装置的任何谐振频率。 可以通过形成伸缩部件的细长横向构件来提供宽度调节。