Ethernet Physical Layer - Minimum Cable Lengths

Minimum Cable Lengths

Fiber connections have minimum cable lengths due to level requirements on received signals. Fiber ports designed for long-haul wavelengths require a signal attenuator if used within a building.

10BASE2 installations require a minimum of 0.5 m between stations tapped into the network cable, this is to minimize reflections.

Industrial Ethernet applications use a star topology with no collisions so that no minimum cable length is required.

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