Multiplexer for bit oriented protocol data link control
    1.
    发明授权
    Multiplexer for bit oriented protocol data link control 失效
    用于面向位的协议数据链路控制的多路复用器

    公开(公告)号:US4531211A

    公开(公告)日:1985-07-23

    申请号:US581808

    申请日:1984-02-21

    CPC分类号: H04L29/06 H04L69/324

    摘要: A bit oriented protocol (e.g. HDLC) data link control multiplexer and demultiplexer are described for handling 256 channels whose data are time division multiplexed in pairs of bits in a serial data stream. The multiplexer and demultiplexer relieve a processor of an associated telephone or packet data switching office from the tasks of multiplexing and demultiplexing, formatting data link control frames, providing CRC checks, and inserting and removing zero bits to distinguish messages from flag bytes. The multiplexer and demultiplexer each include several shift registers for the serial bit stream information, byte boundary indication, CRC data, and effecting zero bit insertion and removal.

    摘要翻译: 描述了一种面向比特的协议(例如HDLC)数据链路控制多路复用器和解复用器,用于处理其数据在串行数据流中以位对的时分复用的256个信道。 复用器和解复用器从复用和解复用的任务,格式化数据链路控制帧,提供CRC校验以及插入和移除零位以区分消息与标志字节来解除相关电话或分组数据交换局的处理器。 多路复用器和解复用器各自包括用于串行比特流信息,字节边界指示,CRC数据和实现零位插入和移除的多个移位寄存器。

    Full-duplex transmission of bit streams serially and in bit-synchronism
on a bus between two terminals.
    2.
    发明授权
    Full-duplex transmission of bit streams serially and in bit-synchronism on a bus between two terminals. 失效
    在两个终端之间的总线上串行和位同步的位流的全双工传输。

    公开(公告)号:US4516236A

    公开(公告)日:1985-05-07

    申请号:US535423

    申请日:1983-09-26

    IPC分类号: H04L12/40 H04M9/02 H04B1/56

    摘要: Each of two terminals transmits a bit stream to a two-wire line in the form of a unipolar pulsed signal, the terminals transmitting pulses of opposite polarity with the bits synchronized, so that the line acts as a distributed exclusive-or gate. In each terminal, pulses on the bus are detected and a consequent received bit stream is exclusively-ored with the bit stream transmitted by this terminal to recover the bit stream transmitted by the other terminal.

    摘要翻译: 两个终端中的每一个以单极脉冲信号的形式将比特流发送到双线线路,终端以比特同步的方式发送具有相反极性的脉冲,使得线路用作分布式异或门。 在每个终端中,检测总线上的脉冲,并且随后接收的比特流与由该终端发送的比特流专用于恢复由另一终端发送的比特流。

    Demultiplexer for bit oriented protocol data link control
    3.
    发明授权
    Demultiplexer for bit oriented protocol data link control 失效
    用于面向位的协议数据链路控制的解复用器

    公开(公告)号:US4531212A

    公开(公告)日:1985-07-23

    申请号:US581809

    申请日:1984-02-21

    CPC分类号: H04L29/06 H04L69/324

    摘要: A bit oriented protocol (e.g. HDLC) data link control multiplexer and demultiplexer are described for handling 256 channels whose data are time division multiplexed in pairs of bits in a serial data stream. The multiplexer and demultiplexer relieve a processor of an associated telephone or packet data switching office from the tasks of multiplexing and demultiplexing, formatting data link control frames, providing CRC checks, and inserting and removing zero bits to distinguish messages from flag bytes. The multiplexer and demultiplexer each include several shift registers for the serial bit stream information, byte boundary indication, CRC data, and effecting zero bit insertion and removal.

    摘要翻译: 描述了一种面向比特的协议(例如HDLC)数据链路控制多路复用器和解复用器,用于处理其数据在串行数据流中以位对的时分复用的256个信道。 复用器和解复用器从复用和解复用的任务,格式化数据链路控制帧,提供CRC校验以及插入和移除零位以区分消息与标志字节来解除相关电话或分组数据交换局的处理器。 多路复用器和解复用器各自包括用于串行比特流信息,字节边界指示,CRC数据和实现零位插入和移除的多个移位寄存器。

    Method of, and a terminal for, transmitting bytes to a bus
    4.
    发明授权
    Method of, and a terminal for, transmitting bytes to a bus 失效
    用于将字节传送到总线的方法和终端

    公开(公告)号:US4569046A

    公开(公告)日:1986-02-04

    申请号:US514445

    申请日:1983-07-18

    CPC分类号: H04M9/025 H04L12/4013

    摘要: A plurality of terminals, such as digital telephones, are connected to a serial data bus formed by a balanced two-wire line. Each terminal transmits bytes bit-serially with the magnitude bits first, in order of decreasing significance, then the sign bit, and finally an even parity bit to maintain the balance of the line, the "1" bits being transmitted with alternating polarity. The terminals operate simultaneously and in synchronism. If a terminal, during a "0" bit of a byte which it is transmitting, detects a "1" pulse on the bus from another terminal, then it gives up transmission for the remainder of that byte and receives the greater magnitude byte which prevails on the bus. Thus a single two-wire line can be used for digital transmission in both directions between arbitrary numbers of telephones.

    摘要翻译: 诸如数字电话的多个终端连接到由平衡双线线路形成的串行数据总线。 每个终端首先以幅度比特顺序发送字节,按照有效性降低的顺序,然后是符号位,最后是偶数奇偶校验位以维持线的平衡,“1”位以交替极性传输。 端子同时运行并同步运行。 如果终端在其正在发送的一个字节的“0”位期间从另一个终端检测总线上的“1”脉冲,则放弃该字节的其余部分的传输,并接收较大的幅度字节 在公交车上。 因此,可以在任意数量的电话之间的双向线路中使用单根双线线路进行数字传输。