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System for testing an optical network using optical time-domain reflectometry (OTDR)

  • US 6,980,287 B2
  • Filed: 08/27/2003
  • Issued: 12/27/2005
  • Est. Priority Date: 08/30/2002
  • Status: Expired due to Fees
First Claim
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1. A system for fault determination and location by time domain reflectometry in a network having a plurality of optic fibre lines to be tested, said system having a coupler with one input and a plurality of outputs, each of said outputs being connected to one line of said plurality of lines to be tested, said system comprising:

  • a means for separating each of said lines to be tested into two channels;

    a first channel to receive a first test impulse corresponds to a first test; and

    a second channel to receive a second test impulse corresponding to a second test, the length of said second channel being greater than the length of said first channel by a predetermined overlength, each of said overlengths being different for each of said lines.

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