CAT5E 10GBase-T SFP+

Hi,

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I understand that you can use CAT5E cables for 10Gb network up to around 50 meters.

I understand that you can use SFP+ 10GBase-T adapters through up to 30 meter long CAT6 cables.

But can you run 10Gb with SFP+ 10GBase-T adapter through 30 meter long cat5e cable?

Any one have any expirience with stuff like this? Customer needs 10Gb network for workstations, they have CAT5E wirings, I want to know if I can use SFP+ switches for this or if I need to use switches with native 10GBase-t interfaces.