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You are here: Home / CompTIA / Network+ / Section IV: Network Management / Chapter 22: Hardware Troubleshooting Tools / TDR/OTDR

TDR/OTDR

When you need to perform detailed troubleshooting of copper and fiber connections, you can use specialized equipment, such as:

  • Time Domain Reflectometer  (TDR): for copper connections
  • Optical Time Domain Reflectometer  (OTDR): for optical fiber connections

Some of the functionalities offered by such devices include:

  • Signal quality
  • Estimating cable lengths
  • Splice locations
  • Cable impedance information
  • Signal loss

The TDR (see Figure 22.10 below) works by sending an electrical signal (pulse) down the wire (copper) and listening for its reflection. Reflections of the . . .

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