 What is CAT 6E? CAT 6E is not officially a recognized standard of data cabling. It is not ratified by any of the standard boards regulating the structured cabling industry. However some manufacturers construct and sell a CAT 6E version of their cable. It is classified as CAT 6 enhanced. In essence it enhances the original capability of CAT 6 from 250 megahertz to a greater capability. It is constructed with great shielding and twists. Generally the claims are an increase to 500 or 550 megahertz. This is more comparable to the ratified version of CAT 6A.