D Link WLG122C1 User Manual
DWL-G122
802.11g Wireless USB Adapter
Manual
Building Networks for People
Contents
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
T echnical S pecifications ......................................................................40
Contacting T echnical Support..............................................................42
Warranty and Registration ...................................................................43
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Package Contents
Contents of Package:
D-Link AirPlusTM G DWL-G122
2.4 GHz 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
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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 802.1 1b 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 64- or 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.
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For home users that will
security for the DWL-G122, used in conjunction with other WPA-compatible
802.1 1 product s, will still be much stronger than ever before when you use the
Pre- Shared Key mode of WPA / WPA2.
not incorporate a RADIUS server in their network, the
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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/802.1 1g compatible
Powered by the USB port; no external power source is required
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 indoors
One year warranty
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**
WPA2 is only for Windows users
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Environmental factors may adversely affect range
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5
Wireless Basics
D-Link wireless products are based on industry standards to provide easy-touse 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.
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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:
Keep the number of walls and ceilings between the DWL-G122 and
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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.
Be aware of the direct line between network devices. A wall that is 1.5
2
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.
3
Building materials can impede the wireless signal - a solid metal door
or aluminum studs may have a negative effect on range. T ry to position
wireless devices and computers with wireless adapters so that the
signal passes through drywall or open doorways and not other materials.
4
Keep your product away (at least 3-6 feet or 1-2 meters) from electrical
devices or appliances that generate RF noise.
7
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 AirPlus
A laptop computer with a D-Link AirPlus G DWL-G122
A desktop computer with a D-Link AirPlus G DWL-G120
A cable modem - D-Link DCM-201
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DI-524
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Getting Started (continued)
Setting up a Wireless Infrastructure Network
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2
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3
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DWL-G122
DWL-G122
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44
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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 AirPlus G DWL-G122 Wireless USB adapter into an
available USB port on your desktop computer. (See the Quick Inst alla-
tion 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 Installa-
tion Guide included with the DWL-G122.)
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Getting Started (continued)
Setting up a Wireless Ad-Hoc Network
DWL-G122
Wireless USB Adapter
Install the D-Link AirPlus G DWL-G122 Wireless USB adapter into
the desktop computer. (See the Quick Inst allation Guide included with
the product.)
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.
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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.
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Using the Configuration Utility
D-Link AirPlus G DWL-G122 uses the Configuration Utility as the
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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 .
T o 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.
If the icon does not display in the taskbar , then click on
this icon on your desktop to open.
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*Configuration Utility icon
in the system tray
Using the Configuration Utility (continued)
Status:
Displays the MAC address
of the access point or
router to which the DWL-
G122 is associated
SSID:
The Service Set Identifier is
the name assigned to the
wireless network. The factory SSID setting is de-
fault.
Frequency:
802.11b indicates that the
DWL-G122 is communi-
cating 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.
Link Info
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.
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Using the Configuration Utility (continued)
SSID:
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
default setting).
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 .
Configuration
IP Settings
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.
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Using the Configuration Utility (continued)
Ad-Hoc Channel:
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.
Advanced
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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