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Zorluk: OrtaTroubleshooting Physical Cabling and Connectors

A network technician is troubleshooting a high optical insertion loss issue on a 10Gbps multimode fiber optic link connecting two distribution switches. An optical power meter indicates a lower-than-expected power level, but no complete signal break is detected along the cable span. The technician suspects physical contamination on the connector ferrule. Which tool should the technician use to visually inspect the connector end-face for microscopic dirt, scratches, or oil?

  1. Fiber inspection scopeCevap
  2. B
    Optical time-domain reflectometer (OTDR)
  3. C
    Tone generator and inductive probe
  4. D
    Copper time-domain reflectometer (TDR)

Cevap

The technician should use a fiber inspection scope to examine the cleanliness and physical surface condition of the connector ferrule.
A fiber inspection scope (or fiber microscope) is specifically designed to magnify the polished end-face of a fiber optic connector ferrule. This tool allows technicians to inspect the optical core for surface dirt, dust, scratches, or fingerprints that impair light transmission.

Adım Adım Çözüm

1
Analyze the reported symptom and target physical component.
The link exhibits high signal loss, and contamination on the fiber ferrule end-face is suspected.
Debris or oils on the optical core obstruct light transmission and cause significant signal attenuation.
2
Select the appropriate diagnostic tool designed for surface inspection.
A fiber inspection scope (fiber microscope) provides high optical magnification of the connector ferrule surface.
Visual examination under magnification is required to verify contamination prior to cleaning.
3
Differentiate from reflectometers and copper testing tools.
Reflectometers analyze signal reflections to calculate distance and loss metrics, while tone probes trace copper wiring, but neither tool can display physical surface images.
Choosing the specialized tool intended for ferrule surface inspection ensures precise diagnostic accuracy.

Anahtar Kavram

Fiber Optic Ferrule Inspection and Tool Selection
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Konular

Troubleshooting Physical Cabling and Connectors

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