RJ45s come in shielded, unshielded, and shielded with integral magnetics
(and probably other flavors as well).

Has anybody got any suggestions / experience / whatever re the use of one or
other of these parts in a product that will live in a plastic box, power by
an external mains adapter / internal regulator. The intention is to use UTP
cable.

I've read Intel's appnotes regarding layout for PHY / Magnetics / RJ45. In a
situation with no chassis to call chassis ground, I suspect the shield is
irrelevant. However, I'm rather attracted to the 'integral magnetics'
solution, and these all seem to have shields. 

Given that the planes are void under the connector I suppose that means this
shield will just have to be 'not connected.

Has anybody got a recommendation regarding voids under the 'integral
magnetics' part?

Regards

Jon Keeble 

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