Stan Hoeppner writes:
> In the US, in the case of environments such as manufacturing floors
> etc with horrific EMI levels, fiber is used instead of UTP CAT5/6.
> With EFI levels that high, even STP won't save you.

STP can make things worse as almost nobody knows how to terminate
shields in such a way as to avoid ground loops.
-- 
John Hasler


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