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：US4481379A

公开(公告)日：1984-11-06

申请号：US443636

申请日：1982-11-24

申请人： Virgil T. Bolick, Jr. ,  Kenneth W. Brownell, Jr. ,  Michael W. Elliott

发明人： Virgil T. Bolick, Jr. ,  Kenneth W. Brownell, Jr. ,  Michael W. Elliott

IPC分类号： H01B7/08 ,  H01B11/00

CPC分类号： H01B7/0838 ,  H01B7/0861

摘要： There is provided an improved flat electrical communications cable which includes a plurality of coplaner pairs of elongated, insulated conductors. The pairs of conductors are embedded in a jacket which supports the cable and maintains the spacing among the conductors and pairs. The spacing between conductors in a pair is substantially less than the spacing between each adjacent pair. The jacket is thicker in the regions around each pair and thinner in the regions between each pair, thus forming the valleys and ridges on each side of the jacket. An elongated metal shield covers at least one side of the jacket. The shield conforms to and is contiguous with the valleys and ridges resulting in somewhat of a sinusoidal cross-sectional appearance of the shield. Each conductor includes a dual insulation, the inner insulation being made from a flame retardant material and the outer insulation being made from a different material from the jacket.

摘要翻译： 提供了一种改进的扁平电通信电缆，其包括多个共面对的细长绝缘导体。 导体对被嵌入到支撑电缆的护套中并且保持导体和对之间的间隔。 一对导体之间的间距大致小于每对相邻的间隔。 夹套在每对周围的区域中较厚，并且在每对之间的区域中较薄，因此在护套的每一侧上形成谷部和脊部。 细长金属屏蔽覆盖护套的至少一侧。 护罩符合并与谷和脊相邻，导致护罩的一些正弦截面外观。 每个导体包括双重绝缘体，内部绝缘体由阻燃材料制成，外部绝缘体由与护套不同的材料制成。