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    SWITCH AND ITS PROTOCOL FOR MAKING DYNAMIC CONNECTIONS
    2.
    发明专利
    SWITCH AND ITS PROTOCOL FOR MAKING DYNAMIC CONNECTIONS 未知

    公开(公告)号：CA2023616C

    公开(公告)日：1995-05-16

    申请号：CA2023616

    申请日：1990-08-20

    Applicant: IBM

    Inventor： BROWN PAUL J ,  ELLIOTT JOSEPH C ,  FRANASZEK PETER A ,  HOPPE KARL H ,  LYNCH KENNETH R ,  SACHS MARTIN W ,  SKARSHINSKI LEON

    IPC: H04L12/56 ,  H04Q3/42

    Abstract: A dynamic switch and its protocol for establishing dynamic connections in a link by the use of frames, each frame having an identification of the source of the frame, an identification of the destination of the frame for the requested connection, and link controls to maintain, initiate or terminate a connection between the source and the destination. The frames are bounded by a start of frame delimiter and an end of frame delimiter which may also act as a connect link control and a disconnect link control, respectively, and the onnections are made through the dynamic switch having dynamic-switch ports. The state of a dynamic-switch port is changed dependent on its present state, the dynamic connection requested, and the direction and type of frames passing through the dynamic-switch port.

    3.
    发明专利
    未知

    公开(公告)号：DE69029189T2

    公开(公告)日：1997-04-30

    申请号：DE69029189

    申请日：1990-08-17

    Applicant: IBM

    Inventor： GREGG THOMAS ANTHONY ,  SKARSHINSKI LEON

    IPC: H04L7/00 ,  H04L7/08 ,  H04L25/49 ,  H04L29/08

    Abstract: An apparatus and method for transmitting commands over a serial link having a switch (10) intermediate a channel and a control unit wherein continuous sequences of idle characters (K.28.5) are sent over the link for maintaining character synchronization. Commands and response information is sent between ports (P) of the switch and the channel (22, 24) and/or the control unit (26, 29) by modifying every other idle character to a modified idle character to which a command or response function has been assigned. In the modification, a selected number of the bits of the idle character are held invariant, and only those bits are varied which form data characters according to the rules of the 8B/10B encoding method. Code points for a total of 124 modified idle characters are disclosed to which a separate command or response may be assigned.

    9.
    发明专利
    未知

    公开(公告)号：DE69029189D1

    公开(公告)日：1997-01-02

    申请号：DE69029189

    申请日：1990-08-17

    Applicant: IBM

    Inventor： GREGG THOMAS ANTHONY ,  SKARSHINSKI LEON

    IPC: H04L7/00 ,  H04L7/08 ,  H04L25/49 ,  H04L29/08

    Abstract: An apparatus and method for transmitting commands over a serial link having a switch (10) intermediate a channel and a control unit wherein continuous sequences of idle characters (K.28.5) are sent over the link for maintaining character synchronization. Commands and response information is sent between ports (P) of the switch and the channel (22, 24) and/or the control unit (26, 29) by modifying every other idle character to a modified idle character to which a command or response function has been assigned. In the modification, a selected number of the bits of the idle character are held invariant, and only those bits are varied which form data characters according to the rules of the 8B/10B encoding method. Code points for a total of 124 modified idle characters are disclosed to which a separate command or response may be assigned.

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