Prestige 782R G.SHDSL Router

 

 

means that addresses are made available to assign to other systems.

 

 

 

Digital

 

The use of a binary code to represent information, such as 0/1, or on/off.

 

 

 

DNS

 

Domain Name System. A database of domain names and their IP addresses. DNS is

 

 

the primary naming system for many distributed networks, including the Internet.

 

 

 

Domain Name

 

The unique name that identifies an Internet site. Domain Names always have 2 or

 

 

more parts that are separated by dots. Generally speaking, the part on the left is the

 

 

most specific and the part on the right is the most general.

 

 

 

DRAM

 

Dynamic RAM stores information in capacitors that must be refreshed periodically.

 

 

 

DSL

 

Digital Subscriber Line technologies enhances the data capacity of the existing

 

 

twisted-pair wire that runs between the local telephone company switching offices and

 

 

most homes and offices. There are actually seven types of DSL service, ranging in

 

 

speeds from 16 Kbits/sec to 52 Mbits/sec. The services are either symmetrical (traffic

 

 

flows at the same speed in both directions) or asymmetrical (the downstream capacity

 

 

is higher than the upstream capacity). DSL connections are point-to-point dedicated

 

 

circuits which means that they are always connected. There is no dial-up. There is also

 

 

no switching, which means that the line is a direct connection into the carrier’s frame

 

 

relay, ATM (Asynchronous Transfer Mode) or Internet-connect system.

 

 

 

DSLAM

 

A Digital Subscriber Line Access Multiplexer (DSLAM) is a network device, usually at a

 

 

telephone company central office, that receives signals from multiple customer Digital

 

 

Subscriber Line connections and puts the signals on a high-speed backbone line using

 

 

multiplexing techniques. Depending on the product, DSLAM multiplexers connect DSL

 

 

lines with some combination of asynchronous transfer mode ATM, frame relay or IP

 

 

networks.

 

 

 

DTE

 

Originally, Data Terminal Equipment meant Dumb Terminal Equipment. But today it is

 

 

a computer, bridge or router that interconnects local area networks (LANs) in

 

 

increasingly more intelligent ways.

 

 

 

EMI

 

Electromagnetic Interference. The interference by electromagnetic signals that can

 

 

cause reduced data integrity and increased error rates on transmission channels.

 

 

 

Ethernet

 

A very common method of networking computers in a LAN. There are a number of

 

 

adaptations to the IEEE 802.3 Ethernet standard, including adaptations with data rates

 

 

of 10 Mbits/sec and 100 Mbits/sec over coaxial cable, twisted-pair cable and fiber-optic

 

 

cable. The latest version of Ethernet, Gigabit Ethernet, has a data rate of 1 Gbit/sec.

 

 

 

FAQ

 

Frequently Asked Questions. FAQs are documents that list and answer the most

 

 

common questions on a particular subject.

 

 

 

FCC

 

The Federal Communications Commission is responsible for allocating the

 

 

electromagnetic spectrum and thus the bandwidth of various communication systems.

 

 

 

Flash Memory

 

Nonvolatile storage that can be electrically erased and reprogrammed so that data can

 

 

 

D

Glossary