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Shielded construction less sensitive to installation
practices than UTP

Even with the most capable installation team, maintaining proper cable pulling tension, bend radius, and pathway fill ratios, and avoiding crushing and/or kinking of the cables during installation is challenging. After the initial installation, substandard MAC work practices such as exceeding maximum pathway fill requirements to accommodate growth, kinking patch cords when re-routing ports, damaging adjacent channels when removing abandoned cables, and crushing cables at the bottom of pathways can also degrade transmission performance. Unlike shielded systems, category 6A UTP systems rely solely on uncompromised cable geometry to maintain alien crosstalk (AXT) performance and, if subjected to poor installation practices and substandard MAC work, are likely to show degraded AXT performance.

Because shielded cable designs resist deformation and their screens and shields are significantly less susceptible to damage, their overall performance is less likely to be adversely affected by poor installation practices. F/UTP cable offers resistance to crushing due to the foil reinforcement and fewer air spaces in the design. S/FTP cabling offers even more resistance to crushing due to the cable's increased foil and braid content and the connector's robust design.

WHITE PAPER: The Hidden Costs of 10G UTP Systems