Restriction of the use of certain Hazardous Substances (Directive 2011/65/EU): It Is a directive of the European Parliament and of the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (before Directive 2002/95/EC).

So when a cable has passed the RoHS restrictions is that the cable does not contain any of the hazardous substances on the directive document list.

To know more about the most used acronyms cabling: CABLING ACRONYMS