Match each physical network cabling fault or diagnostic scenario on the left with the most appropriate diagnostic tool or corrective action on the right.
- Excessive Near-End Crosstalk (NEXT) measured on a newly terminated Category 6A UTP drop.Re-terminate the connector ensuring individual conductor pairs remain twisted up to the terminal pins.
- High optical attenuation occurring at a localized spot along a fiber optic patch cable route.Utilize an Optical Time-Domain Reflectometer (OTDR) to locate macrobends or mechanical splices.
- Severe signal degradation on an Ethernet link despite passing a basic wiremap continuity test for pin-to-pin conductivity.Use a cable certifier to detect a split pair configuration where wires are incorrectly paired.
- Need to trace an unidentified structural copper cable run to its specific port location on a patch panel.Attach a tone generator to the cable and sweep an inductive probe across the punch-down block.
Cevap
The physical cabling faults match their respective corrective actions and diagnostic tools as follows: Excessive NEXT requires re-terminating the connector with minimal pair untwisting; localized high fiber attenuation is located using an OTDR; split pairs that pass basic continuity require a cable certifier; and tracing an unlabeled copper cable run requires a tone generator with an inductive probe.
Each physical layer issue maps directly to its proper diagnostic tool or remediation practice according to TIA/EIA cabling standards: NEXT errors on copper stems from pair untwisting; fiber loss points require distance reflection analysis via OTDR; split pairs bypass basic continuity checks and require dynamic certifiers; and tracing copper drops requires tonal signal injection.
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Anahtar Kavram
Physical Layer Cabling Diagnostics and Tool Selection