Method and apparatus for monitoring channel frequency response

DC
  • US 7,564,895 B2
  • Filed: 12/21/2001
  • Issued: 07/21/2009
  • Est. Priority Date: 03/29/2001
  • Status: Expired due to Fees
First Claim
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1. A method of retrieving channel characteristics of a Digital Subscriber Line (DSL) channel having a plurality of bins, comprising the steps of:

  • determining, at tip and ring terminals of a modem input port, and storing in data registers on a per bin basis a channel frequency response measurement and a noise measurement measured at initialization at a first end of the DSL channel without an effect of a filter or an automatic pain controller;

    determining and storing in data registers on a per bin basis a signal-to-noise measurement measured at show time at the first end of the DSL channel without the effect of the filter or the automatic gain controller; and

    transmitting the channel frequency response measurement, the noise measurement and the signal-to-noise measurement from the first end to a second end of the DSL channel.

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