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Method and apparatus for automatically detecting and measuring distortion in a DSL system

  • US 6,111,936 A
  • Filed: 01/28/1999
  • Issued: 08/29/2000
  • Est. Priority Date: 01/28/1998
  • Status: Expired due to Term
First Claim
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1. A method for determining distortion on a communication channel to which is connected at least one conventional Plain Old Telephone Service (POTS) device and at least one digital subscriber line (DSL) device, comprising the steps of:

  • varying an output signal of a first DSL device by gating said output signal on and off according to a time sequence to produce a time-varied DSL signal on the communication channel;

    measuring an audio frequency band distortion on the communication channel; and

    correlating the audio frequency band distortion on the communication channel to the time sequence of the time-varied DSL signal.

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