Local area network with fault-checking, priorities and redundant

Details Local area network with fault-checking, priorities and redundant Local area network with fault-checking, priorities and redundant

1986-11-07

1989-07-11

Smith, Jerry

Excavating

370 16, G06F 1116

Patent

active

048478377

ABSTRACT:
A redundant error-detecting and correcting local area networked computer system (10) having a plurality of nodes (16) each including a network connector board (20') for connecting to an interfacing transceiver (18) attached to a network cable (12, 14). The system comprises a first network cable (12) disposed along a path to interconnect the nodes. The first cable includes a plurality of first interfacing transceivers. A second network cable (14) includes a plurality of second interfacing transceivers. A plurality of three position switches (48) each having a signal input, three outputs for individual selective connection to the input, and a control input for receiving signals designating which of the outputs is to be connected to the signal input are provided. Master switch (50) is provided for receiving directive signals for outputting addressed switch position signals to the three position switches. Finally, there is a monitor and control computer (30) for monitoring the status of the networked computer system by sending messages to the nodes and receiving and verifying messages therefrom and for sending control signals to the master switch to cause the master switch to cause respective ones of the nodes to use a desired one of the first and second cables for transmitting and receiving messages and for disconnecting desired ones of the nodes from both cables.

REFERENCES:
patent: 4159470 (1979-06-01), Strojny
patent: 4575842 (1986-03-01), Katz
patent: 4627045 (1986-12-01), Olson
patent: 4648088 (1987-03-01), Cagle
patent: 4658396 (1987-04-01), Barden

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