中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

5 records (took 0.018 seconds)

    LOCAL AREA NETWORK STATION CONNECTOR
    4.
    发明专利
    LOCAL AREA NETWORK STATION CONNECTOR 未知

    公开(公告)号：CA1238383A

    公开(公告)日：1988-06-21

    申请号：CA493208

    申请日：1985-10-17

    Applicant: IBM

    Inventor： ANNUNZIATA EUGENE J ,  FARESS JAMES M II ,  STAMMELY THOMAS E

    IPC: H04L12/42 ,  H04B15/00

    Abstract: RA985012 LOCAL AREA NETWORK STATION CONNECTOR A wiring methodology for attaching office machines to a communications network includes at least one central wiring facility or concentrator with lobe segments emanating or fanning out in a "Star Fashion" configuration to terminal points within offices. A plurality of switch control elements are provided in the concentrator. When activated, each switch control element inserts a lobe segment and attaches machines into the communications network. Lobe segments not in use are bypassed (disconnected) within the concentrator. A single station connector (SSC) can be used to increase the number of office machines that may be attached to a single lobe segment. In addition, the SSC may be used to configure a mobile Local Area Network (LAN) System without resorting to permanent wiring schemes. CROSS REFERENCE TO RELATED PATENTS, PATENT APPLICATIONS AND ARTICLES U.S. Patent 4,527,216, entitled "Sub-Milliamp Mechanical Relay Control," filed March 16, 1983; issued July 2, 1985 to Thomas E. Stammely and assigned to the assignee of the present invention, describes a circuit arrangement suitable for controlling a bi-stable relay. The circuit arrangement includes a capacitor which is initially charged with a charge that is sufficient to set and reset the bi-stable relay. During the set cycle a portion of the charge is dumped into the set coil to set the relay. During the reset cycle the remaining portion of the charge is dumped into the reset coil thereby resetting the relay.

    TERMINAL DISCONNECT AND MEDIA WIRE FAULT DETECT MECHANISM
    5.
    发明专利
    TERMINAL DISCONNECT AND MEDIA WIRE FAULT DETECT MECHANISM 未知

    公开(公告)号：CA1222800A

    公开(公告)日：1987-06-09

    申请号：CA455136

    申请日：1984-05-25

    Applicant: IBM

    Inventor： ANNUNZIATA EUGENE J ,  STAMMELY THOMAS E

    IPC: G01R31/02 ,  G01R31/04 ,  H04L1/00

    Abstract: TERMINAL DISCONNECT AND MEDIA WIRE FAULT DETECT MECHANISM A device, method and system for testing in situ the wiring of a ring or similar type local area network having a loop conduction path with a plurality of data terminal equipment (DTE) coupled to said loop conduction path. The DTE is provided with a mechanism for generating a d.c. current. The d.c. current flows from the DTE through a length of interconnecting conductors and self-shorting connectors into the loop conduction path. A current measuring device monitors the current at the interconnecting conductors for imbalance current flow and/or over current. The presence of either a current imbalance and/or over current indicates a malfunctioning (short circuit, broken wire, etc.) in the wiring.

Patent Agency Ranking