Data Over Cable Service Interface Specification
<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.
CableLabs FAQ.
(2001-07-10)
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