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Threshold alarms for processing errors in a multiplex communications system

  • US 4,817,092 A
  • Filed: 10/05/1987
  • Issued: 03/28/1989
  • Est. Priority Date: 10/05/1987
  • Status: Expired due to Term
First Claim
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1. A method to analyze errors in a system, the system having a plurality of resources with replaceable units, a display, a processor, and memory means for storing decision trees, data structures, threshold alarm tasks, failing resource manager tasks and error analysis tasks, the resources including a diagnostics card having a processor and memory means for storing resource analysis tasks, and communication resources, the method comprising the steps of:

  • (a) testing said resources intermittently by said error analysis tasks invoking a card analysis task on said diagnostics card to test for an error in said communication resources in said system;

    (b) detecting an error and invoking an appropriate error analysis task to process said error;

    (c) processing said error by said appropriate error analysis task to isolate said error to a replaceable unit by automatically traversing said decision trees;

    (d) writing data to record said error in said data structures in said memory means of said system;

    (e) invoking said failing resource manager tasks to retest said replaceable unit;

    (f) invoking said threshold alarm tasks to determine an effect of removal of said replaceable unit on said system;

    (g) indicating to said failing resource manager tasks if said replaceable unit can be removed;

    (h) removing said replaceable unit from service if said retest detects said error and said threshold alarms tasks indication is favorable;

    (i) retesting said replaceable unit to detect a return to normal operation;

    (j) returning said replaceable unit to service if normal operation is determined; and

    (k) displaying a message based on said error on said display of said system.

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