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Difficulty: EasyTroubleshooting Physical Cabling and Connectors

A network technician is troubleshooting a newly installed Category 6 (Cat6) twisted-pair cable run that fails to establish an Ethernet link. The technician suspects there may be a physical break in the copper conductor along the wall run or an incorrect wire pinout at the RJ-45 wall jack. Which TWO of the following tools should the technician use to accurately locate the physical cable fault distance and verify pin mapping?

  1. Time-Domain Reflectometer (TDR)Answer
  2. Wiremap testerAnswer
  3. C
    Tone generator and probe kit
  4. D
    Optical power meter

Answer

The technician should use a Time-Domain Reflectometer (TDR) to determine the exact distance to any physical break or short in the copper line, and a wiremap tester to confirm correct pinout layout and continuity across all conductors.
A Time-Domain Reflectometer (TDR) sends signals down a copper cable to measure reflection time, pinpointing the precise location/distance of a break or short. A wiremap tester evaluates individual conductors to verify proper pin-to-pin continuity and sequence (e.g., T568A vs T568B). Together, these tools address both fault location and wiring pinout verification.

Step-by-Step Solution

1
Select the tool appropriate for locating physical fault distance on copper media.
Identify the Time-Domain Reflectometer (TDR), which measures signal reflection timing to determine fault location.
Simple continuity testers or tone probes cannot calculate signal distance down a cable.
2
Select the tool appropriate for evaluating pin-to-pin wiring configuration.
Identify the wiremap tester, which checks pin continuity and reveals improper wiring standards or split pairs.
A wiremap tester directly tests pinout integrity at both ends of a twisted-pair connection.

Key Concept

Cabling Diagnostic Tools (TDR and Wiremap)
Estimated Time:1m 0s
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Topics

Troubleshooting Physical Cabling and Connectors

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