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1.发明授权公开(公告)号：US09661110B2
公开(公告)日：2017-05-23
申请号：US14622089
申请日：2015-02-13
发明人： Ehab Tahir
CPC分类号： H04L69/22 , H04L7/00 , H04L67/12 , H04L69/26 , H04L69/322 , H04L69/323
摘要： Described herein is a system and method for enhanced channel access in existing communication networks. The system comprising: a first enhanced node comprising a first processor, the first processor configured to: transmit a legacy frame header of a physical layer protocol data unit (PPDU), the legacy frame header comprising an indicator indicating that sub-PPDUs will be transmitted during a duration associated with transmission of a legacy PPDU; a second enhanced node comprising a second processor configured to receive the legacy frame header; and a third enhanced node comprising a third processor configured to receive the legacy frame header.
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2.发明授权Reversal of connections of telegraphic line wires upon detection of unwanted polarity of the loop current 失效在检测到环路电流的不需要的极性时，反向电报线路的连接
公开(公告)号：US4434324A
公开(公告)日：1984-02-28
申请号：US343311
申请日：1982-01-27
申请人： Giuseppe Boggio , Mario Lorenzi
发明人： Giuseppe Boggio , Mario Lorenzi
CPC分类号： H04L25/027
摘要： The system comprises at least one teleprinter station (1) connected to an exchange (3) by means of a transmission-reception line (2) and comprising a polarity detector (31) for the line circulating current, and a device (30) for reversing the connection of the line wires. If the wires erroneously become reversely connected following maintenance work on a line of single current type, then false call and conversation signals are generated which automatically trigger a checking operation in which the polarity detector is suitably examined under control of a ROM routine E controlling a CPU 84. If the current is found to be the reverse of the correct current, the reversing device is operated in order to reverse the polarity of the connection. In contrast, in the case of a double current line, the reversing device is operated when current is absent in the reception line, thus indicating an erroneous line connection. If the line current interruption is prolonged, a warning device (28) is activated.
摘要翻译： 该系统包括通过发送接收线路（2）连接到交换机（3）的至少一个电传打印机站（1），并且包括用于线路循环电流的极性检测器（31），以及用于 反转线路的连接。 如果在单电流线路上的维护工作之后电线错误地反向连接，则产生虚假呼叫和通话信号，其自动触发在控制CPU的ROM例程E的控制下对极性检测器进行适当检查的检查操作 84.如果发现电流与正确的电流相反，则为了反转连接的极性，操作反向装置。 相反，在双电流线的情况下，当在接收线路中不存在电流时，反转装置被操作，从而指示线路连接错误。 如果线路电流中断延长，则启动警告装置（28）。
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3.发明授权
公开(公告)号：US4242750A
公开(公告)日：1980-12-30
申请号：US947653
申请日：1978-10-02
申请人： Herbert Finck , Konrad Reisinger
发明人： Herbert Finck , Konrad Reisinger
CPC分类号： H04L1/24 , H04B17/408
摘要： A process for testing a data transmission system by which data are transmitted by way of two data transmission links and by way of a first transmission device and a second transmission device provides that a test loop is closed, in dependence upon a loop signal, and a transmission section is tested. Data are transmitted in data blocks and each block includes a status bit, a synchronizing bit and n data bits. The loop signal is formed from a given combination of the status bit and data bits, and at least one of the data bits is inverted before being returned to the second transmission device.
摘要翻译： 用于测试通过两个数据传输链路并通过第一传输设备和第二传输设备传输数据的数据传输系统的过程提供了根据环路信号关闭测试环路，以及 传输部分进行测试。 数据在数据块中发送，每个块包括状态位，同步位和n个数据位。 环路信号由状态位和数据位的给定组合形成，并且至少一个数据位在返回到第二传输设备之前被反转。
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公开(公告)号：US4090059A
公开(公告)日：1978-05-16
申请号：US624240
申请日：1975-10-20
IPC分类号： B41J2/345 , B41J2/355 , B41J5/30 , G08B5/22 , H04L17/00 , H04L17/02 , H04L21/00 , H04L29/00 , H04Q7/00 , H04Q7/06 , H04Q7/08 , H04Q7/10 , H04Q7/12 , H04Q7/14 , H04Q7/16 , H04Q7/20 , H05B1/00
CPC分类号： G08B5/227
摘要： A paging system, or the like, having a transmitting station and a plurality of pocket sized subscriber units is disclosed. The transmitting station has a keyboard for encoding alphanumeric characters of a message and a subscriber code, a storage means for a predetermined number of characters of a message, means for converting a binary character code, such as ASCII, to a binary code representative of the character to be displayed in matrix form, and a format circuit for transmitting successive columns of the successive matrix code with blank columns and timing spaces therebetween to facilitate reconstruction of the subscriber code and message. Each of the subscriber units is battery powered and sized to be carried in a pocket of the user's clothing. Each pocket unit includes a receiver, means for detecting a unique subscriber code and enabling the display, for example, a non-impact type thermal printer having a single column of thermal print elements, and a system for advancing a thermally sensitive record tape past the print elements. Synchronism of such pocket printer is controlled by the format of the subscriber code and message, with blank spaces at the end of each column of data being detected to cause the print elements to be heated in accordance with the column data and then the record tape advanced one column width. A receiver having a nonprinting, visual message display is also disclosed.
摘要翻译： 公开了具有发送站和多个口袋大小的用户单元的寻呼系统等。 发送站具有用于编码消息和订户代码的字母数字字符的键盘，用于消息的预定数量字符的存储装置，用于将诸如ASCII之类的二进制字符代码转换为代表 以矩阵形式显示的字符，以及格式化电路，用于发送连续矩阵码的连续列与空列和其间的定时空间，以便重建用户代码和消息。 每个用户单元是电池供电的并且尺寸被安置在用户衣服的口袋中。 每个口袋单元包括一个接收器，用于检测唯一的用户代码和启用显示器的装置，例如具有单列热打印元件列的非冲击型热敏打印机，以及用于使热敏记录带超过 打印元素。 这种口袋打印机的同步由用户代码和消息的格式控制，每个数据列的末尾都有空白处，以使打印元件根据列数据被加热，然后记录磁带提前 一列宽。 还公开了具有非打印的视觉消息显示的接收机。
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公开(公告)号：US4000363A
公开(公告)日：1976-12-28
申请号：US515876
申请日：1974-10-18
CPC分类号： H04L12/02
摘要： A teleprinting apparatus which eliminates a dial switch for connection to a remote subscriber and which substitutes a circuit arrangement which utilizes the keyboard through a coding system to generate pulse trains for connection to the remote subscriber. A selection pulse generator is set in operation by a "proceed to select" signal which is supplied with signals emitted by a keyboard and derived from a counter pulse train of constant repetition frequency. In this way selection pulses are produced, the number of which is determined by the key which is being operated. The number is actually fixed by the use of a comparator which compares the keyboard signal with the output of a counter which is counting the pulse train.
摘要翻译： 一种电报打印设备，其消除用于连接到远程用户的拨号开关，并且代替通过编码系统利用键盘的电路装置来产生用于连接到远程用户的脉冲串。 通过“继续选择”信号设置选择脉冲发生器，该信号被提供有由键盘发出的信号并且从恒定重复频率的计数脉冲串导出。 以这种方式产生选择脉冲，其数量由正在操作的键确定。 该数字实际上通过使用比较器来固定，该比较器将键盘信号与计数脉冲串的计数器的输出进行比较。
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公开(公告)号：US3658161A
公开(公告)日：1972-04-25
申请号：US3658161D
申请日：1970-02-18
申请人： HOLMES LAWRENCE JR
发明人： HOLMES LAWRENCE JR
摘要： A baseplate attachment for initiating operations of a typewriter in response to coded electrical signals from an external source includes bail actuators for manipulating the internal character selection mechanism of the typewriter and further includes solenoids which determine the particular bail actuators to be activated in response to each set of incoming signals. The driving force for operating the bail actuators to manipulate the character selection mechanism is obtained from the typewriter motor rather than the solenoids which may be small and do not require high current input signals.
摘要翻译： 用于响应于来自外部源的编码电信号的打字机的启动操作的基板附件包括用于操纵打字机的内部字符选择机构的保释致动器，并且还包括螺线管，其确定响应于每个组而被激活的特定吊环致动器 的输入信号。 用于操作吊环执行机构来操纵字符选择机构的驱动力是从打字机电机而不是螺线管获得的，螺线管可能很小并且不需要高电流输入信号。
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公开(公告)号：US3627907A
公开(公告)日：1971-12-14
申请号：US3627907D
申请日：1969-10-10
申请人： HASLER AG
发明人： DIGGELMANN HANS , KUHNE RUDOLF
CPC分类号： H04L25/4912
摘要： A system for the transmission by a transmitter of a first synchronous binary pulse train having means for converting said pulse train into a second synchronous pulse train and having means for transmitting said second pulse train to a receiver adapted to receive said second pulse train and to convert it into a pulse train corresponding to the first mentioned pulse train.
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公开(公告)号：US3429986A
公开(公告)日：1969-02-25
申请号：US3429986D
申请日：1965-08-27
申请人： IBM
发明人： RAHENKAMP ROBERT A
CPC分类号： H04L13/182 , H04L17/00
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公开(公告)号：US3427033A
公开(公告)日：1969-02-11
申请号：US3427033D
申请日：1966-03-11
申请人： MATSUKATA KOSUKE
发明人： MATSUKATA KOSUKE
CPC分类号： H04L17/00
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