20Preface

Acronyms

The following acronyms are used in this manual:

AC

Alternating Current

AUI

Attachment Unit Interface

CB

Certification Body

CEE

Certification of Electrical Equipment

CENELEC

European Committee for Electrotechnical Standardization

CHAP

Challenge Handshake Authentication Protocol

CSA

Canadian Standards Associates

cUL

Underwriter Laboratories testing to Canadian standards

dBA

Decibels Audible

DIP

Dual Inline Pins

DMZ

Demilitarized Zone

DNS

Domain Name Service

DSL

Digital Subscriber Lines

FDX

Full Duplex

HAR

Harmonized

HD

Harmonized Document

HDX

Half Duplex

IEC

International Electrotechnical Commission

IP

Internet Protocol

IPX

Internetwork Packet Exchange

ISDN

Integrated Services Digital Network

ISP

Internet Service Provider

Kb/s

Kilobits Per Second

LAN

Local Area Network

LED

Light-Emitting Diode

MB

Megabyte

Mb/s

Megabits Per Second

MDI

Medium Dependent Interface

MDI-X

Medium Dependent Interface - Crossover

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Nortel Networks 400-S Acronyms, Following acronyms are used in this manual