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Apparatus for testing ATM channels

  • US 5,313,453 A
  • Filed: 03/20/1992
  • Issued: 05/17/1994
  • Est. Priority Date: 03/20/1991
  • Status: Expired due to Term
First Claim
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1. An asynchronous transfer mode channel testing apparatus for testing an asynchronous transfer mode channel, the asynchronous transfer mode channel having switches therein to direct traffic, comprising:

  • test cell generating trunk means, provided on an input side of said asynchronous transfer mode channel, for generating a test cell having a tag attached to a header thereof, the tag including test cell information which specifies a particular path in the asynchronous transfer mode channel to be tested, said test cell generating trunk means supplying the test cell to the asynchronous transfer mode channel to be tested;

    test cell detecting means, provided in each of a plurality of switches of the asynchronous transfer mode channel, for detecting whether a switch along the particular path specified by the test cell has been switched and providing a maintenance scan signal indicative of a result of the detecting means; and

    controlling means for testing the switch along the particular path specified by the test cell by judging whether said test cell detecting means provides the maintenance scan signal.

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