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.

• 128-QAM
• 13
• 1394
• 1/3 FEC
• 14
• 15
• 1.5-way paging
• 16
• 16-QAM
• 16-QPSK
• 18
• 1:8 Splitter
• 1A
• 1A1
• 1A2
• 1Base5 (1 Mbps; Baseband; 500 meters)
• 1B+D
• 1. Domain Name System. The naming convention that divides the Internet into logical domains identified in Internet Protocol version 4 (IPv4) as a 32-bit portion of the total address.The standard convention is user@organization.domain, where user is the name of the end user, organization is the name of the enterprise or other organization owning or sponsoring the address, and domain is the type of entity owning or sponsoring the address.The administration of the DNS is the responsibility of Internet Corporation for Assigned Names and Numbers (ICANN). See also domain, ICANN, Internet, and IPv4. 2.
• 1. In storage, irrelevant material, usually zero (0) bits, added to a data block in order to fill it to a minimum size, to force certain fields of control data or user data into certain positions or sizes, or to prevent the user data from duplicating a bit pattern that has a specific control meaning. See also block. 2.
• 1 cps, 1 Hz
• 1+ Dialing
• 1G (1st Generation)
• 1G (1st Generation)
• 1-persistent carrier sense multiple access (1-Persistent CSMA)
• 1-Persistent CSMA (1-Persistent Carrier Sense Multiple Access)