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Method of locating fault of communication system

  • US 5,706,422 A
  • Filed: 07/16/1996
  • Issued: 01/06/1998
  • Est. Priority Date: 12/30/1989
  • Status: Expired due to Term
First Claim
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1. A communication system comprising:

  • a data transmission channel means for transmission of frames comprising a loop data transmission channel;

    a plurality of stations connected to said data transmission channel;

    at least one control station connected to said data transmission channel;

    a plurality of channel reconfiguring means, including a first level channel reconfiguring means and a second level channel reconfiguring means, for detecting, locating and eliminating a fault in said communication system by determining transmission normality at each of said stations via said data transmission channel, determining a location of said fault in said communication system and eliminating said fault from said communication system by reconfiguring said data transmission channel according to the location of said fault,wherein said first level channel reconfiguring means for detecting, locating and eliminating said fault is adapted to perform said fault detecting, locating and eliminating functions at a level for a rapid determination, to thereby reconfigure said communication system, andsaid second level channel reconfiguring means, comprising said control station, which includes reconfiguration controlling means for executing processes for reconfiguring said data transmission channel, transmitting a confirmation signal to said reconfigured data transmission channel, and determining whether or not transmission via said reconfigured data transmission channel is normal or not according to a response signal to said transmit confirmation signal, performs said fault detecting, locating and eliminating functions repeatedly at a more deliberate and reliable level than said first level channel reconfiguring means until a determination has been made that said fault has been located and said data transmission channel has been reconfigured; and

    control means for controlling, upon detection and of said fault, said channel reconfiguring means to perform said fault locating and eliminating functions from said level for a rapid determination of said first level channel reconfiguring means to said level for a more deliberate and reliable determination of said second level channel reconfiguring means, until said fault has been eliminated and said communication system has been reconfigured.

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