Cable shielding, (or screening), can be composed of a metallic braid, or metallic or polyester foil. The shielding can be either wrapped around all 4 pairs of twisted pair cable, just the individual conductor pairs, or both the entire cable and individual pairs. In a shielded product code, the letters preceding the slash are equivalent to the shielding on the whole cable; the code after the slash is equivalent to the shielding for the individual pairs. For example:
As a guide, if you have motors or generators placed next to network cables, EMI and RFI can reek havoc with data transmission on a copper cable. This will result in data errors, and quite possibly downtime. In order to wipe out EMI/RFI interference, you will need to go for shielded cables and connectors.
As you can see from the list below, there are fundamentally two types of cable shields: braided and foil. Which option you plump for will depend on your application.
Here is a glossary of terms to help you decode cable shielding:
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