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Echo device method for locating upstream ingress noise gaps at cable television head ends

  • US 6,032,019 A
  • Filed: 01/20/1999
  • Issued: 02/29/2000
  • Est. Priority Date: 10/31/1997
  • Status: Expired due to Term
First Claim
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1. A method of testing the reliability of an upstream data path in a cable system using a cable modem device configured for use in a variable carrier frequency loop testing system, the method comprising:

  • receiving a downstream test packet at a demodulator in a cable modem device, the test packet having a first media access control address of the cable modem device;

    replacing the first media access control address with a second media access control address corresponding to a test packet checker device; and

    transmitting the test packet upstream to the test packet checker.

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