Data Over Cable Systems Interface Specifications for cable modems developed by CableLabs and standardised internationally.

DOCSIS defines interface requirements for a cable modem used for high-speed data distribution over cable television system networks.

The common term for modems meeting this specification is CableLabs Certified Cable Modems.

The DOCSIS specifications have been formally approved by the European Telecommunications Standards Institute (ETSI) and the International Telecommunications Union (ITU).