DOCSIS (Data Over Cable Service Interface Specification)

use of the quadrature phase shift keying (QPSK) modulation technique. DOCSIS 1.1 specifies 16-QAM, which roughly doubles the data rate, and doubles the channel width. DOSCIS 2.0 further increases the upstream rate by again doubling the channel width, and using either time division multiple access (TDMA) in combination with 64-QAM or synchronous code division multiple access (S-CDMA) in combination with 128-QAM trellis-coded modulation (TCM). See also 128-QAM, 16-QAM, 256-QAM, 64-QAM, always on, asymmetric, byte, CableLabs, cable modem, CMTS, coaxial cable, compression, downstream, encapsulate, FDX, headend, HFC, modulation, MPEG-2, noise, packet, PSTN, QAM, QPSK, S-CDMA, set-top box, signaling rate, symbol, and upstream.

• 3
• 30
• 30B+D
• 30B+D
• 32
• 34
• 36
• 38
• 3 cps, 3 Hz
• 3G (3rd Generation)
• 3GPP
• 3GPP2
• 3GPP (3rd Generation Partnership Project)
• 3rd Generation Partnership Project (3GPP)
• +3V
• -3V
• +3V
• -3V
• +3V
• -3V
• 3x
• 4
• 40
• 419 Advance Fee Fraud
• 42