D Link WLG122C1 User Manual

DWL-G122

802.11g Wireless USB Adapter

Manual

Building Networks for People

Package Contents ................................................................................	3
Introduction............................................................................................	4
Features and Benefits ...........................................................................	6
Wireless Basics ....................................................................................	7
Installation Considerations ....................................................................	8
Getting Started ......................................................................................	9
Using the Configuration Utility ..............................................................	11
Using the Configuration Utility with Macintosh OS ...............................	20
Networking Basics ..............................................................................	24
Troubleshooting...................................................................................	37
Technical Specifications ......................................................................	40
Contacting Technical Support ..............................................................	42
Warranty and Registration ...................................................................	43

Package Contents

Contents of Package:

D-Link AirPlusTM G DWL-G122

2.4GHz Wireless USB 2.0 Adapter

Manual on CD-ROM

Quick Installation Guide

Cradle

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

System Requirements:

A computer or laptop with an available USB port

Windows XP/2000/Me/98SE

Mac OS X (v10.3x)

At least 32MB of memory and a 300MHz processor

Properly installed and working USB Controller

Introduction

The D-Link AirPlus G DWL-G122 Wireless USB Adapter is a convenient Plug & Play USB 2.0 solution that brings wireless networking to your laptop or desktop PC.

With transfer rates up to 54Mbps you can connect to a wireless network at home, at the office or at any wireless hotspot. Now you can stay connected wherever you are and wherever you go.

The DWL-G122 is Wi-Fi compliant, meaning that it can connect and interoperate with other 802.11b or 802.11g Wi-Fi-compliant wireless routers, access points and adapters. The DWL-G122 connects to any available USB port on a laptop or desktop Windows and Macintosh-based computer and also includes a USB cradle. With the optional USB cradle, the DWL-G122 can be positioned virtually anywhere at a workstation to achieve the best available wireless signal reception - whether that workstation is in your office, on your deck or patio, by the pool, at the local coffee shop, or in an airport terminal while waiting to board your next flight.

The adapter works with Apple Mac OS X (v10.2x or later) Jaguar, Microsoft Windows XP, Windows 2000 and other Windows operating systems to ensure that you’ll be up and running on a wireless network in just a matter of seconds.

Using its default settings, the DWL-G122 automatically connects to other D-Link Air or AirPlus wireless products as soon as it’s active.

In addition to featuring 64or 128-bit WEP encryption, the DWL-G122 offers the added security of WPA(Wi-Fi Protected Access)/WPA2 when used with other WPA / WPA2 devices in a network with a RADIUS server.

For home users that will not incorporate a RADIUS server in their network, the security for the DWL-G122, used in conjunction with other WPA-compatible 802.11 products, will still be much stronger than ever before when you use the

PreShared Key mode of WPA / WPA2.

Features and Benefits

Provides high-speed wireless connection at up to 54Mbps

Compact size for placement anywhere

Convenience of Plug & Play installation

Fully 802.11b/802.11g compatible

USB 2.0 standard

Better Security with WPA/WPA21 - In addition to 64-,128-bit WEP encryption,you can also securely connect to a wireless network using WPA(Wi-Fi Protected Access) providing you a much higher level of security for your data and communication than has previously been available.

Optimal wireless reception using its cradle (included). Position the DWL-G122 almost anywhere in your workspace to achieve the best reception possible.

Supports Infrastructure networks via an access point and Peer-to-Peer communication in Ad-Hoc mode

User-friendly configuration and diagnostic utilities

Connects at up to 328 feet indoors2

One year warranty

1 WPA2 is only for Windows users

2 Environmental factors may adversely affect range

Wireless Basics

D-Link wireless products are based on industry standards to provide easy-to- use and compatible high-speed wireless connectivity within your home, 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 computer network that transmits and receives data with radio signals instead of wires. WLANs are used increasingly in both home and office environments, and public areas 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 to 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.

People use WLAN technology for many different purposes:

Mobility - Productivity increases when people have access to data in any location within the operating range of the WLAN. Management decisions based on real-time information can significantly improve worker efficiency.

Low Implementation Costs - WLANs are easy to set up, manage, change and relocate. Networks that frequently change can benefit from WLANs ease of implementation. WLANs can operate in locations where installation of wiring may be impractical.

Installation and Network Expansion - Installing a WLAN system can be fast and easy and can eliminate the need to pull cable through walls and ceilings. Wireless technology allows the network to go where wires cannot go - even outside the home or office.

Inexpensive Solution - Wireless network devices are as competitively priced as conventional Ethernet network devices.

Scalability - WLANs can be configured in a variety of ways 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 users to larger Infrastructure networks to accommodate hundreds or thousands of users, depending on the number of wireless devices deployed.

Wireless Basics (continued)

Installation Considerations

The DWL-G122 lets you access your network using a wireless connection from virtually anywhere within its operating range. Keep in mind, however, that the number, thickness and location of walls, ceilings, or other objects that the wireless signals must pass through, may limit the range. 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:

1Keep the number of walls and ceilings between the DWL-G122 and other network devices to a minimum - each wall or ceiling can reduce your DWL-G122’s range from 3-90 feet (1-30 meters.) Position your devices so that the number of walls or ceilings is minimized.

2Be 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.

3Building materials can impede the wireless signal - a solid metal door or aluminum studs may have a negative effect on range. Try to position wireless devices and computers with wireless adapters so that the signal passes through drywall or open doorways and not other materials.

4Keep your product away (at least 3-6 feet or 1-2 meters) from electrical devices or appliances that generate RF noise.

Getting Started

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-G122 Wireless Network 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):

A wireless router - D-Link AirPlusTM G DI-524

A laptop computer with a D-Link AirPlusTM G DWL-G122

A desktop computer with a D-Link AirPlusTM G DWL-G120

A cable modem - D-Link DCM-201

Getting Started (continued)

Setting up a Wireless Infrastructure Network

DWL-G122 DWL-G122

4	5

For a typical wireless setup at home (as shown above), please do the following:

You will need broadband Internet access (a cable or DSL-subscriber line into your home or office).

Consult with your cable or DSL provider for proper installation of the modem.

Connect the cable or DSL modem to your broadband router. (See the Quick Installation Guide included with your router.)

Install the D-Link AirPlusTM G DWL-G122 Wireless USB adapter into an available USB port on your desktop computer. (See the Quick Installation Guide included with the DWL-G122.)

Install the D-Link AirPlus G DWL-G122 wireless USB adapter into an available USB port on your laptop computer. (See the Quick Installation Guide included with the DWL-G122.)

Getting Started (continued)

Setting up a Wireless Ad-Hoc Network

DWL-G122

Wireless USB Adapter

Install the D-Link AirPlusTM the desktop computer. (See the product.)

G DWL-G122 Wireless USB adapter into the Quick Installation Guide included with

Install the D-Link AirPlus G DWL-G122 Wireless USB adapter into the laptop computer. (See the Quick Installation Guide included with the product.)

Set the wireless configuration for the adapters to Ad-Hoc mode, set the adapters to the same channel, and assign an IP address to each computer on the Ad-Hoc network.

IP Address

When assigning IP addresses to the computers on the network, please remember that the IP address for each computer must be in the same IP address range as all the computers in the network, and the subnet mask must be exactly the same for all the computers in the network.

For example: If the first computer is assigned an IP address of 192.168.0.2 with a subnet mask of 255.255.255.0, then the second computer can be assigned an IP address of 192.168.0.3 with a subnet mask of 255.255.255.0, etc.

IMPORTANT: If computers or other devices are assigned the same IP address, one or more of the devices may not be visible on the network.

UsingtheConfigurationUtility

D-Link AirPlusTM G DWL-G122 uses the Configuration Utility as the management software. The utility provides the user an easy interface to change any settings related to the wireless adapter. After you have completed the installation of the DWL-G122 (refer to the Quick Installation Guide that came with your purchase) whenever you start the computer, the Configuration Utility starts automatically and the system tray icon is loaded in the toolbar (see illustration below.*) Clicking on the utility icon will start the Configuration Utility. Another way to start the Configuration Utility is to click on

Start>Programs>D-Link AirPlus G >D-Link AirPlus G Utility.

If you are using Windows XP, you can use either the Zero Configuration Utility or the D-Link Configuration Utility.

To use the D-Link Configuration Utility with XP, right-click on the wireless network icon in the taskbar in the lower right-hand corner of your computer screen.

In the window that appears, select

View Available Wireless Networks and click the Advanced button. The screen at right will appear.

Select the Wireless Networks tab.

Uncheck the box in the properties window that enables windows configuration.

After you have done this, you can then use the D-Link Configuration Utility with XP by clicking on the D-Link Configuration Utility icon.

*Configuration Utility icon in the system tray

If the icon does not display in the taskbar, then click on this icon on your desktop to open.

Using the Configuration Utility (continued)

Status:	Link Info

Displays the MAC address of the access point or router to which the DWLG122 is associated

SSID:

The Service Set Identifier is the name assigned to the wireless network. The factory SSID setting is default.

Frequency:

802.11b indicates that the DWL-G122 is communicating in the 2.4GHz band.

Wireless Mode:

Either Infrastructure or Ad-Hoc will be displayed here. (Please see the Getting Started section in this manual for an explanation of these two modes.)

Encryption:

You can see if WEP (Wired Equivalent Privacy) is Enabled or Disabled here.

Tx Rate:

The default setting is Auto; Tx Rate settings are automatically determined for an optimal speed up to a maximum of 54Mbps.

Channel:

The default setting is Auto. The channel selection is automatically determined by the DWL-G122.

Signal Strength:

Displays the signal strength of the DWL-G122’s wireless connection to the access point or router.

Packet Count:

Displays the statistics of the data packets that are transmitted and received.

Rescan Button:

Rescans for the strongest signal with the current SSID and associates with that access point or router.

Using the Configuration Utility (continued)

SSID:

Configuration

Service Set Identifier is a name that identifies a wireless network. Access points and wireless devices attempting to connect to a specific WLAN (Wireless Local Area Network) must use the same SSID. The default setting is default.

Wireless Mode:

Click on the pull-down menu; select from the following options:

Infrastructure - connecting to the WLAN
using an access point. (This is the	IP Settings
default setting).	IP Settings
Ad-Hoc – wireless mode used when
connecting directly to a computer
equipped with a wireless adapter in a
Peer-to-Peer environment.
Data Encryption:
Select Enabled or Disabled.
Authentication:
Choose one of the following modes:
Open Authentication – the DWL-G122
is visible to all devices on the network.
Shared Authentication – allows
communication only with other devices
with identical WEP settings.

Auto – will automatically adjust to the Authentication mode of the wireless access point or router.

Key Length:

Select the key length and either ASCII (e.g., a word) or hexadecimal format.

Keys 1-4:

Select the default key.

Hexadecimal digits consist of the numbers 0-9 and the letters A-F.

ASCII (American Standard Code for Information Interchange) is a code for representing English letters as numbers from 0-127.

IP Settings:

When you click IP Settings in the Configuration window, the pop-up screen above will appear. Configure the IP Settings in this window.

Click Apply to save changes.

Using the Configuration Utility (continued)

Ad-Hoc Channel:

Advanced

All devices in the Ad-Hoc network must be set to the same channel.

Profile IP Settings:

You can Enable or

Disable the IP Settings portion of your profile here. If you select Disable you will need to configure the IP address information each time you connect to a network. If you select Enable you will maintain the same IP address information each time you connect to a network.

Power Mode:

Disable -This default setting consumes the most power. Enable - This setting consumes the least power.

Launch Utility on Startup:

Select Enable or Disable.

Data Packet Parameter:

Select the parameters here.

Fragmentation Threshold:

This value should remain at its default setting of 2432. If you experience a high packet error rate, you may slightly increase your Fragmentation Threshold within the value range of 256 to 2432. Setting the Fragmentation Threshold too low may result in poor performance.

RTS Threshold:

This value should remain at its default setting of 2432. If inconsistent data flow is a problem, only a minor modification should be made.

Click Apply if you have made any changes.

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