DSE XH1137, Installation Manual, Page: 47 / 49

XH1137 – DSE ADSL PCI Modem
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DWMT - Discrete Wavelet Multitone - A variation of DMT modulation that improves
performance by using wavelets rather than tones to provide additional isolation of sub-
channels.
DNS - Domain Name System - The protocol used for assigning text addresses (such
as www.2Wire.com) for specific computers and computer accounts on the Internet.
DHCP - Dynamic Host Configuration Protocol - A TCP/IP protocol that allows
servers to assign IP addresses dynamically to PCs and workstations. The PC or
workstation "borrows" the IP address for a period of time, then the IP address returns to
the DHCP server for reassignment.
encapsulation - the technique used to layer protocols
filter - A device which transmits a specific frequency and stops all other frequencies.
Firewall - A security product that employs a combination of hardware and software to
prevent unauthorized users or traffic from the Internet from gaining access onto a
private local area network (LAN).
full-motion video - The projection of 20 or more frames (or still images) per second to
provide real-time, continuous motion. Broadcast video in the United States uses 30
frames per second, and most film technologies use 24 frames per second.
G.dmt - Also known as full-rate DSL. A type of asymmetric DSL technology, based on
DMT modulation, that offers up to 8 Megabits per second downstream bandwidth and
1.544 Megabits per second upstream bandwidth. "G.dmt" is actually a nickname for the
standard officially known as ITU-T Recommendation G.992.1. (See International
Telecommunications Union .)
G.lite [pronounced "G-dot-light"] - Also known as Universal ADSL. A type of
asymmetric DSL technology, based on DMT modulation, that offers up to 1.5 Megabits
per second downstream bandwidth and 384 Kilobits per second upstream. G.lite DSL
does not usually require a splitter and is easier to install than other types of DSL, but is
generally unacceptable for voice and entertainment applications. "G.lite" is a nickname
for the standard officially known as G.992.2. (See International Telecommunications
Union .)
G.992.1 - See G.dmt.
G992.2 - See G.lite.
IEEE - Institute of Electrical and Electronics Engineers - A membership
organization comprised of engineers, scientists, and students that sets standards for
computers and communications.
ISO - International Organization of Standardization - Develops, coordinates, and
promulgates international standards that facilitate world trade.
ITU - International Telecommunication Union - A United Nations organization that
coordinates use of the electromagnetic spectrum and creation of technical standards
for telecommunication and radio communication equipment.