Prestige 1600 Universal Access Concentrator

 

 

 

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

 

Asymmetric Digital Subscriber Line. A digital subscriber line (DSL) technology in which the

 

 

 

 

transmission of data from server to client is much faster than the transmission from the client to

 

 

 

 

the server.

 

 

 

 

 

 

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.

 

 

 

 

 

 

ATU-C and ATU-R

 

ADSL Transmission Unit, Central or Remote: the device at the end of an ADSL line that stands

 

 

 

 

between the line and the first item of equipment in the subscriber premises or telephone switch.

 

 

 

 

It may be integrated within an access node.

 

 

 

 

 

 

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).

 

 

 

 

 

 

bandwidth-on-demand

 

The ability of a user to dynamically set upstream and downstream line speeds to a particular

 

 

 

 

rate of speed.

 

 

 

 

 

 

Bit

 

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

 

 

 

 

smallest unit of computerized data.

 

 

 

 

 

 

bps

 

Bits per second. A standard measurement of digital transmission speeds.

 

 

 

 

 

 

Byte

 

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

 

 

 

 

 

 

Call Filtering

 

Call filtering is used to determine if a packet should be allowed to trigger a call. Outgoing

 

 

 

 

packets must undergo data filtering before they encounter call filtering.

 

 

 

 

 

 

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.

 

 

 

 

 

 

CI/CLI Commands

 

CI/CLI (Command Interface/Command Line Interface) commands can be accessed via Menu

 

 

 

 

24.8. For details on CI commands to configure your Prestige, please consult the supporting CD.

 

 

 

 

ZyXEL recommends use of the CI Commands only for debugging purposes.

 

 

 

 

 

 

CIR

 

See Committed Information Rate.

 

 

 

 

 

 

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.

 

 

 

 

 

 

Committed

 

The carrier programs virtual circuits into the network between your sites and charges you for a

 

 

Information Rate

 

specific level of service called the committed information rate (CIR). The CIR is a negotiated rate

 

 

 

 

and is basically a guarantee that the carrier will always have that bandwidth available. The CIR

 

 

 

 

limit for the Prestige is 8000Kbps. The sum of CIRs from all channels in a line cannot exceed

 

 

 

 

8000Kbps due to the processing limit of the P1600 CPU.

 

 

 

 

 

 

CPE

 

Customer Premises Equipment: that portion of the ADSL system residing within the customer's

 

 

 

 

premises.

 

 

 

 

 

 

crossover Ethernet

 

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

 

 

cable

 

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

 

 

 

 

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 computer

 

 

 

 

equipment to digital transmission lines. The Channel Service Unit device connects with the

 

 

 

 

digital communication line and provides a termination for the digital signal. The Data Service

 

 

 

 

Unit device, sometimes called a digital service unit, is the hardware component you need to

 

 

 

 

transmit digital data over the hardware channel. The device converts signals from bridges,

 

 

 

 

routers and multiplexors into the bipolar digital signals used by the digital lines. Multiplexors mix

 

 

 

 

voice signals and data on the same line.

 

 

 

 

 

 

Data Filtering

 

Data filtering screens the data to determine if the packet should be allowed to pass. Data filters

 

 

 

 

 

 

Glossary

I