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Token ring local area network testing apparatus for matching its speed to ring speed

  • US 5,365,513 A
  • Filed: 01/11/1993
  • Issued: 11/15/1994
  • Est. Priority Date: 01/11/1993
  • Status: Expired due to Fees
First Claim
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1. A method for modifying a rate at which data is sent by a testing apparatus around a token ring local area network, comprising:

  • inserting a testing apparatus into a token ring having a predetermined rate at which data is properly transmitted around the token ring.ascertaining whether an acceptable event has occurred, said acceptable event including receipt of a valid data stream by said testing apparatus after insertion thereof, said valid data stream included in one of a token and a frame;

    counting each time said acceptable event occurs;

    resetting a timer before conducting said counting step;

    monitoring said timer for passage of a predetermined time interval, said predetermined time interval being less than a time that causes a beacon state to occur in the token ring;

    determining whether a predetermined count has been counted indicative that a predetermined number of acceptable events has occurred, before said timer has reached said predetermined time interval, with said predetermined count being greater than one; and

    modifying a rate at which said testing apparatus is able to send data into the token ring when a determination is made that said timer has exceeded said predetermined time interval before said predetermined count is reached.

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