Qualifying telephone lines for data transmission

  • US 7,012,991 B1
  • Filed: 06/23/2000
  • Issued: 03/14/2006
  • Est. Priority Date: 06/23/1999
  • Status: Active Grant
First Claim
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1. A method of assessing the suitability of customer telephone lines for data transmission, comprising:

  • selecting a telephone line having tip and ring wires via a test access of a switching station;

    electrically connecting the tip and ring wires together adjacent one end of the selected line to form a common mode configuration;

    performing single-ended electrical measurements by driving the wires in the common mode configuration with respect to ground; and

    determining an electrical property of the wires from the single ended measurements.

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