D-Link AirPlus G DWL-120 User manual

Manual

Building Networks for People

802.11g (2.4GHz)

Wireless USB Adapter

D-Link AirPlus G

DWL-G120

Contents

PackageContents ................................................................................3

Introduction............................................................................................4

Wireless Basics....................................................................................6

GettingStarted....................................................................................10

UsingtheConfigurationUtility..............................................................13

NetworkingBasics ..............................................................................19

Troubleshooting...................................................................................32

TechnicalSpecifications ......................................................................35

ContactingTechnical Support ..............................................................36

Warranty andRegistration ...................................................................37

Contents of Package:

D-Link AirPlus G DWL-G120

802.11g (2.4 GHz) Wireless USB Adapter

Manual on CD-ROM

QuickInstallationGuide

Package Contents

Properly installed and working USB Controller

USB Cable

If any of the above items are missing, please contact your reseller.

SystemRequirements:



Windows XP/2000/Me/98SE



Acomputer or laptop with an available USB port



At least 32 MB of memory and a 300 MHz processor



Introduction

* This is the theoretical maximum of the chipset used in the DWL-G120 Wireless USB

Adapter.Actualthrough-put may vary.

The D-Link AirPlus G DWL-G120 802.11g (2.4GHz) Wireless USBAdapter is

a convenient Plug & Play USB 2.0 solution that brings wireless networking to

your laptop or desktop PC. It provides up to a 128-bit level of WEP security to

your wireless data transfers.

The DWL-G120 comes with software drivers for the most popular Microsoft

Windowsoperating systemsand canbeintegratedintoa largernetwork, running

Windows XP/2000/Me/98SE in either Ad-Hoc mode (without an access point

or router) or Infrastructure mode (with an access point or router). The IEEE

802.11g Ethernet standard allows you to connect computers and 802.11g

compatible devices at speeds up to 54Mbps*, dependent upon the distance

between wireless adapters, the configuration of your working environment, or

the capabilities or limitations of your computer systems.

Unlike most network cards, the DWL-G120 provides data transfers at up to 54

Mbps when used with other D-Link AirPlus G products. The 802.11g standard

is backwards compatible with 802.11b products.

Features and Benefits

* Environmental factors may adversely affect range

Convenience of Plug & Play installation.



Three year warranty (USA only).



Connects at up to 328 feet indoors.*



User-friendly configuration and diagnostic utilities.



Supports Infrastructure networks via an access point or router and

Peer-to-Peer communication in Ad-Hoc mode.



Network Security with 128-bit WEP encryption.

USB 2.0 standard.



Fully 802.11g compatible. Backwards compatible with 802.11b

devices.



Five times faster - achieve data transfer speeds up to 54 Mbps; up to

5x faster than conventional 802.11b networks, when used with other

802.11g devices.



D-Link wireless products are based on industry standards to provide easy-to-

useand compatiblehigh-speedwirelessconnectivitywithin yourhome,business

or public access wireless networks. D-Link wireless products will allow you

access to the data you want, when and where you want it. You will be able to

enjoy the freedom that wireless networking brings.

A Wireless Local Area Network (WLAN) is a cellular computer network that

transmits and receives data with radio signals instead of wires. WLANs are

usedincreasinglyin bothhomeand officeenvironments, and publicareas such

as airports, coffee shops and universities. Innovative ways to utilize WLAN

technology are helping people to work and communicate more efficiently.

Increased mobility and the absence of cabling and other fixed infrastructure

have proven to be beneficial for many users.

Wireless users can use the same applications they use on a wired network.

Wireless adapter cards used on laptop and desktop systems support the same

protocols as Ethernet adapter cards.

Wireless Basics

Features Link/ActivityLED

Power - Indicates that the

DWL-G120isproperly

installed in the computer.

Link - Blinks when data is

beingtransmittedthrough

thewireless connection.

Mini-USB 2.0 port

Used to connect the

DWL-G120toyour

computer

Antenna

Used to wirelessly

connectto802.11g

networks

Wireless Basics (continued)

People use wireless LAN technology for many different purposes:

Mobility - Productivity increases when people have access to data in any

locationwithin theoperating rangeof theWLAN. Managementdecisionsbased

on real-time information can significantly improve worker efficiency.

Low Implementation Costs –WLANsareeasy to setup, manage, change

and relocate. Networks that frequently change can benefit from WLANs ease

ofimplementation.WLANs canoperatein locationswhere installation ofwiring

may be impractical.

Installation and Network Expansion - Installing a WLAN system can be

fastand easyandcan eliminatetheneedtopullcablethroughwalls andceilings.

Wireless technology allows the network to go where wires cannot go - even

outside the home or office.

Scalability – WLANs can be configured in a variety of topologies to meet the

needs of specific applications and installations. Configurations are easily

changed and range from peer-to-peer networks suitable for a small number of

usersto largerinfrastructurenetworkstoaccommodatehundredsorthousands

of users, depending on the number of wireless devices deployed.

Inexpensive Solution - Wireless network devices are as competitively

priced as conventional Ethernet network devices.

Standards-Based Technology

The DWL-G120 Wireless USBAdapter utilizes the 802.11g standard.

TheIEEE 802.11g standardisanextension ofthe 802.11bstandard. Itincreases

thedatarateupto 54Mbpswithin the2.4GHz band,utilizing OFDMtechnology.

Thismeansthat inmost environments, withinthe specifiedrangeof thisdevice,

you will be able to transfer large files quickly or even watch a movie in MPEG

format over your network without noticeable delays. This technology works by

transmittinghigh-speeddigitaldata overaradio waveutilizingOFDM (Orthogonal

FrequencyDivision Multiplexing)technology.OFDM works bysplittingthe radio

signalintomultiple smallersub-signals thatare thentransmittedsimultaneously

at different frequencies tothe receiver. OFDMreduces theamount of crosstalk

(interference)insignal transmissions.TheD-Link DWL-G120will automatically

sense the best possible connection speed to ensure the greatest speed and

range possible.

The DWL-G120 is backwards compatible with 802.11b devices. This means

that if you have an existing 802.11b network, the devices in that network will be

compatible with 802.11g devices at speeds up to 11Mbps in the 2.4GHz range.

Wireless Basics (continued)

Installation Considerations

TheD-Link AirPlusG DWL-G120 letsyouaccess yournetwork usingawireless

connection from virtually anywhere within its operating range. Keep in mind,

however, that the number, thickness and location of walls, ceilings, or other

objectsthat thewirelesssignals mustpass through,may limittherange.Typical

ranges vary depending on the types of materials and background RF (radio

frequency) noise in your home or business. The key to maximizing wireless

range is to follow these basic guidelines:

Keep your product away (at least 3-6 feet or 1-2 meters) from electrical

devices or appliances that generate RF noise.

Keep the number of walls and ceilings between the DWL-G120 and

other network devices to a minimum - each wall or ceiling can reduce

your DWL-G120’s range from 3-90 feet (1-30 meters.) Position your

devices so that the number of walls or ceilings is minimized.

Be aware of the direct line between network devices.A wall that is 1.5

feet thick (.5 meters), at a 45-degree angle appears to be almost 3 feet

(1 meter) thick. At a 2-degree angle it looks over 42 feet (14 meters)

thick! Position devices so that the signal will travel straight through a

wall or ceiling (instead of at an angle) for better reception.

Building materials can impede the wireless signal - a solid metal door

oraluminum studsmay havea negative effecton range.Tryto position

wireless devices and computers with wireless adapters so that the

signalpasses throughdrywalloropendoorwaysand notothermaterials.

Wireless Basics (continued)

Getting Started

With its default settings, the DWL-G120 will connect with other

D-Link AirPlus G products, right out of the box.

A wireless broadband Router-

D-Link AirPlus Xtreme G DI-624

A laptop computer with a USB wireless network adapter -

D-Link AirPlus G DWL-G120

A desktop computer with a USB wireless network adapter -

D-Link AirPlus G DWL-G120

A Cable modem -

D-Link DCM-201

There are basically two modes of networking:

Infrastructure – using an access point or router, such as the DI-624.

Ad-Hoc – directly connecting to another computer, for Peer-to-Peer

communication, using wireless network adapters on each computer, such

as two or more DWL-G120 Wireless USB Adapters.

On the following pages we will show you an example of an Infrastructure

Network and an Ad-Hoc Network.

An Infrastructure network contains an access point or router. The

Infrastructure Network example shown on the following page contains the

following D-Link network devices (your existing network may be comprised

of other devices):

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