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Computing (FOLDOC) dictionary
Data Over Cable Service Interface Specification
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communications, networking (DOCSIS) ITU-approved interface
requirements for cable modems involved in high-speed data
distribution over a cable television network. DOCSIS
compatible equipment uses a 6 MHz carrier band for
downstream, using 64 and 256 QAM (ITU Annex B), and QPSK
and 16 QAM for upstream, allowing up to 36 and 10 Mb/s,
respectively for downstream and upstream channels.