Data Over Cable Service Interface Specification


Data Over Cable Service Interface Specification

(communications, networking)(DOCSIS) ITU-approved interfacerequirements for cable modems involved in high-speed datadistribution over a cable television network. DOCSIScompatible equipment uses a 6 MHz carrier band fordownstream, using 64 and 256 QAM (ITU Annex B), and QPSKand 16 QAM for upstream, allowing up to 36 and 10 Mb/s,respectively for downstream and upstream channels.

CableLabs FAQ.