Prestige 645 ADSL Internet Access Router

 

 

 

 

Glossary

 

 

10BaseT

 

The 10-Mbps baseband Ethernet specification that uses two pairs of twisted-pair cabling

 

 

 

 

(Category 3 or 5): one pair for transmitting data and the other for receiving data.

 

 

 

 

 

 

 

 

 

 

 

 

ADSL

 

Asymmetrical Digital Subscriber Line is an asymmetrical technology, meaning that the

 

 

 

 

downstream data rate is much higher than the upstream data rate. ADSL operates in a

 

 

 

 

frequency range that is above the frequency range of voice services, so the two systems can

 

 

 

 

operate over the same cable.

 

 

 

 

 

 

 

ARP

 

Address Resolution Protocol is a protocol for mapping an Internet Protocol address (IP

 

 

 

 

address) to a physical machine address that is recognized in the local network.

 

 

 

 

 

 

 

ATM

 

Asynchronous Transfer Mode is a LAN and WAN networking technology that provides

 

 

 

 

high-speed transfer. ATM uses fixed size packets of information called cells. These cells can

 

 

 

 

be switched more quickly and efficiently than variable length packets because they are all

 

 

 

 

regular and predictable with no need for dealing with different sizes of packets.

 

 

 

 

 

 

 

Backbone

 

A high-speed line or series of connections that forms a major pathway within a network.

 

 

 

 

 

 

 

Bandwidth

 

This is the capacity on a link usually measured in bits-per-second (bps)

 

 

 

 

 

 

 

Bit

 

(Binary Digit) -- A single digit number in base-2, in other words, either a 1 or a zero. The

 

 

 

 

smallest unit of computerized data.

 

 

 

 

 

 

 

Byte

 

A set of bits that represent a single character. There are 8 bits in a Byte.

 

 

 

 

 

 

 

CDR

 

Call Detail Record. This is a name used by telephone companies for call related information.

 

 

 

 

 

 

 

CHAP

 

Challenge Handshake Authentication Protocol is an alternative protocol that avoids sending

 

 

 

 

passwords over the wire by using a challenge/response technique

 

 

 

 

 

 

 

Client

 

A software program that is used to contact and obtain data from a Server software program

 

 

 

 

on another computer. Each Client program is designed to work with one or more specific

 

 

 

 

kinds of Server programs, and each Server requires a specific kind of Client. A Web Browser

 

 

 

 

is a specific kind of Client

 

 

 

 

 

 

 

crossover

 

A cable that wires a pin to its opposite pin, for example, RX+ is wired to TX+. This cable

 

 

Ethernet

 

connects two similar devices, for example, two data terminal equipment (DTE) or data

 

 

cable

 

communications equipment (DCE) devices.

 

 

 

 

 

 

 

CSU/DSU

 

Channel Service Unit/Data Service Unit. CSUs (channel service units) and DSUs (data

 

 

 

 

service units) are actually two separate devices, but they are used in conjunction and often

 

 

 

 

combined into the same box. The devices are part of the hardware you need to connect

 

 

 

 

 

 

 

Glossary

 

C