User`s Manual

User`s Manual
Wireless 802.11b/g PCI Adapter
EW-7326Ig
User’s Manual
Version: 1.0(July, 2008)
COPYRIGHT
Copyright ©2005/2006 by this company. All rights reserved. No part of this
publication may be reproduced, transmitted, transcribed, stored in a retrieval system,
or translated into any language or computer language, in any form or by any means,
electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the
prior written permission of this company
This company makes no representations or warranties, either expressed or implied,
with respect to the contents hereof and specifically disclaims any warranties,
merchantability or fitness for any particular purpose. Any software described in this
manual is sold or licensed "as is". Should the programs prove defective following their
purchase, the buyer (and not this company, its distributor, or its dealer) assumes the
entire cost of all necessary servicing, repair, and any incidental or consequential
damages resulting from any defect in the software. Further, this company reserves the
right to revise this publication and to make changes from time to time in the contents
hereof without obligation to notify any person of such revision or changes.
Federal Communication Commission
Interference Statement
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
4. Consult the dealer or an experienced radio technician for help.
FCC Caution
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
Any changes or modifications not expressly approved by the party responsible for
compliance could void the authority to operate equipment.
Federal Communications Commission (FCC) Radiation Exposure Statement
This equipment complies with FCC RF radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with a
minimum distance of 20 centimeters between the radiator and your body.
R&TTE Compliance Statement
This equipment complies with all the requirements of DIRECTIVE 1999/5/EC OF THE
EUROPEAN PARLIAMENT AND THE COUNCIL of March 9, 1999 on radio equipment
and telecommunication terminal Equipment and the mutual recognition of their
conformity (R&TTE)
The R&TTE Directive repeals and replaces in the directive 98/13/EEC
(Telecommunications Terminal Equipment and Satellite Earth Station Equipment) As of
April 8, 2000.
Safety
This equipment is designed with the utmost care for the safety of those who install and
use it. However, special attention must be paid to the dangers of electric shock and
static electricity when working with electrical equipment. All guidelines of this and of the
computer manufacture must therefore be allowed at all times to ensure the safe use of
the equipment.
EU Countries Intended for Use
The ETSI version of this device is intended for home and office use in Austria, Belgium,
Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Bulgaria,
Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Romania,
Slovakia, Slovenia, the Netherlands, Portugal, Spain, Sweden, and the United Kingdom.
The ETSI version of this device is also authorized for use in EFTA member states:
Iceland, Liechtenstein, Norway, and Switzerland.
EU Countries not intended for use
None
Please check the declaration of conformity on www.edimax.com
CONTENTS
1.
Product Introduction ..............................................................................................2
1.1.
Features ........................................................................................................2
1.2.
Specifications...............................................................................................2
2.
2. Package Contents...............................................................................................3
3.
Hardware Installation .............................................................................................4
4.
Software Installation...............................................................................................4
5.
Connect to Wireless Access Point........................................................................8
5.1 Using Realtek Wireless Configuration Utility ................................................8
5.2 Using Windows Zero Config..........................................................................12
6.
Configuration Utility .............................................................................................16
6.1.
Utility Overview ..........................................................................................16
6.2.
Available Network ......................................................................................18
6.3.
General........................................................................................................19
6.4.
Profile..........................................................................................................20
6.4.1 Configure the Profile ............................................................................21
6.5.
Advanced....................................................................................................25
6.6.
Status ..........................................................................................................27
6.7.
Statistics .....................................................................................................27
6.8.
Software AP................................................................................................28
6.8.1
AP Properties Setting..........................................................................29
6.8.2
AP Advanced........................................................................................29
6.8.3
AP Statistics.........................................................................................30
6.8.4
SoftAP...................................................................................................31
7.
RT-Set Wizard........................................................................................................32
8.
5 Troubleshooting.................................................................................................35
1
1. Product Introduction
Thank you for your purchasing Edimax Wireless 802.11b/g PCI Adapter. This PCI
adapter is designed to comply with IEEE 802.11b/g Wireless LAN standard and easy to
carry with the Mini size. It is suitable for any Desktop computers.
This adapter supports higher data throughput than the IEEE 802.11b/g standard (up to
54Mbps). It supports specific ways to increase the data transfer rate at a time;
compress the data and decrease the waiting time to send the next data to the Routers
or Access Points. When the adapter is connecting to the Routers or Access Points with
the proprietary feature, the wireless network will be more effective.
The power consumption of the Adapter is very low. Furthermore, it also provides several
levels of power saving modes allowing user customizes the way of saving the power
from his/her portable or handheld devices. It is cost-effective, together with the versatile
features; it is the best solution for you to build your wireless network.
1.1. Features
z
z
z
z
z
z
z
Complies with IEEE 802.11b/g Standards.
Supports data transfer rate up to 54Mbps.
Supports high throughput for multi-media data bandwidth requirement.
Support 64/128-bit WEP, WPA & WPA2 Encryption.
Provides 2dBi detachable antenna
Supports 32-bit PCI interface.
Supports operating system: Windows OS 98SE/Me/2000/XP/Vista, Mac OS
10.3.x/10.4.x & Linux OS
1.2. Specifications
z Standard: IEEE 802.11b/g
z Interface: 32-bit PCI
z Frequency Band: 2.4000 ~ 2.4835GHz (Industrial Scientific Medical Band)
z Modulation: OFDM with BPSK, QPSK, 16QAM, 64QAM (11g) BPSK, QPSK,
CCK (11b)
z
z
z
Data Rate: 54/48/36/24/18/12/11/9/6/5.5/2/1Mbps auto fallback
Security: 64/128-bit WEP Data Encryption, WPA/WPA2 (TKIP with IEEE
802.1x) and AES
Antenna: External detachable dipole antenna (Connector: RP-SMA connector)
z
Drivers: Windows 98SE/Me/2000/XP
2
z
z
z
z
z
z
z
LEDs: Link, TX/RX
Transmit Power: 17dBm±2dBm
Power Consumption: TX: 340mA, RX: 320mA
Dimension: 19(H) x 127(W) x 121(D) mm
Temperature: 32~131°F (0 ~55°C)
Humidity: Max. 95% (NonCondensing)
Certification: FCC, CE
2. 2. Package Contents
Before you starting to use this Wireless PCI Adapter, please check if there’s anything
missing in the package, and contact your dealer of purchase to claim for missing items:
„ One Wireless PCI Adapter
„ One 2dBi Antenna
„ One Quick Installation Guide
„ One CD-ROM (Including Multi-language QIG, User’s Manual and Driver/Utility)
3
3. Hardware Installation
A. Turn off your computer and remove its cover.
B. Insert the PCI card to an available PCI slot firmly.
C. Secure this card to the rear of the computer chassis and put back the cover.
D. Secure the antenna to the antenna connector of the card.
E. Turn on the computer.
4. Software Installation
This wizard can be run in Windows 2000/XP/XP64/2003/Vista. The following
procedures are operated in Windows XP. (Procedures are similar for Windows
2000/XP/XP64/Vista.)
Note1: If you have installed the Wireless PCI Card driver & utility before, please
uninstall the old version first.
1. Insert the CD shipped along with the product into your CD-ROM drive.
The Windows Vista will popup AutoPlay window, Please select “Install
or run program” to execute Autorun.exe program. The Autorun.exe
program should be executed automatically. If not, run Autorun.exe
manually from “Autorun” folder in the CD.
2.
The follow ing screen will be displayed. Click “Setup Utility” to run the
setup wizard.
Please select ‘Allow’ if Windows indicates that ‘an unidentified
program wants access to your computer’.
4
3. Select the Setup Language and click “OK” to proceed.
4. Click “Next” to start installing driver and utility.
5
5. Select the Region Domain for which WLAN is authorized to use and
click “Next” to continue.
6. Radio regulation warning window. Due to the Radio regulation at
different area, different radio law might be applied. Please make sure
your region selection is correct.
6
7. The system starts to install the driver and utility.
8. Click “Finish” to complete the driver and utility installation.
7
5. Connect to Wireless Access Point
Using Configuration Utility to Connect to Wireless Access Point
5.1 Using Realtek Wireless Configuration Utility
1. After installation is complete, wireless configuration utility will be
shown an icon at your windows desktop as below. Please click the
icon by right mouse key to lunch the configuration utility.
2. Configuration utility will scan for wireless access points automatically,
and all found access points will be displayed on “Available Network”.
Please select an access point you wish to connect, and click ‘Add to
Profile’. If the wireless access point you want to connect does not
show here, please click ‘Refresh’
3. If the wireless access point uses encryption, you have to input WEP
passphrase or WPA preshared key. Please ask the owner of the
wireless access point you want to connect, and input the correct
8
passphrase / preshared key at “Network key” & “Confirm network key”,
then click ‘OK’.
If the value you inputted here is wrong, you will not be able to connect
to wireless access point. Authentication type is selected automatically,
please don’t change it.
9
4. The utility will automatically add the access point at Wireless Utility
Profile.
10
5. If the wireless access point is successfully connected, you’ll see a
connected icon
displayed at the lower-left corner of wireless
configuration utility window and click ‘Close’ to exit.
11
5.2 Using Windows Zero Config
1. After lunch wireless configuration, Please select “Windows Zero
Config” and click “OK” to disable the utility of the adapter..
2. Please lunch Windows Zero Config by double-click the wireless
connection icon in the lower-left corner on Windows desktop.
12
3. The Windows Zero Config Panel will pup-up. Please select the wireless
access point which you want to connect and click “Connect”
13
4. If the wireless access point without encryption, there is warning window
will pup-up. Please click “Connect Anywhere”.
14
5. When you see the “Connected” shows on the Windows Zero Config
window, the wireless is successfully connected.
15
6. Configuration Utility
The Configuration Utility is a powerful application that helps you configure the Wireless LAN PCI Card
and monitor the link status and the statistics during the communication process.
The Configuration Utility appears as an icon on the system tray and desktop of Windows. You can open
it by double-click on the icon.
In the Desktop
In the System Tray
Right click the icon in the system tray there are some items for you to operate the configuration utility.
Open Config Utility
RT-Set Wizard
Select “Open Config Utility” to open the configuration utility.
Select “RT-Set Wizard” to open the RT-Set wizard.
About
Hide
Select “About” to show the utility information.
Select “Hide” to hide the utility in the system tray.
6.1. Utility Overview
There are several parts in the utility screen. Please refer to the following table for the description.
A
B
E
C
D
16
Parameter
A
Description
Refresh – Refresh card list in the “B“ block.
RT-Set – Open the RT-Set wizard.
Mode – There are two modes: Station and Access Point. If
“Station“ is selected, the card works as a wireless card. If “Access
Point“ is selected, the card will works as a wireless AP.
View – Enable “Status Bar“ and the “D“ block in the utility will
display the current status of the utility.
About – To check the version of the utility, select this item.
B
This is a list for you to configure several cards in your PC from the
utility.
Show Tray Icon – To show the icon in the system tray, select the
C
item.
Windows Zero Config – To configure the card from Windows XP
Zero Configuration, check the item.
Radio Off – This function is for you to turn off or turn on the radio
of the card. If the radio is turned off, the card will not work.
Disable Adapter – This function is for you to disable or enable the
card.
D
E
It is the status bar that displays the current status of the utility. To
close it, please disable the “Status Bar“ in the “View“ item.
There are several tabs in the block for you to setup the function of
the card. Please refer to the description in the following sections.
17
6.2. Available Network
When you open the Configuration Utility, the system will scan all the channels to find all the access
points/stations within the accessible range of your card and automatically connect to the wireless
network with the highest signal strength. From the “Available Network” tab, all the networks nearby will
be listed. You can change the connection to another network.
Parameter
Description
Available Network(s)
This list shows all information of the available wireless networks
within the range of your card. The information includes SSID,
Channel, Encryption, Network Authentication, Signal and etc. If
you want to connect to any network on the list, double-click the
selected network.
Refresh
Click “Refresh“ to update the available networks list. It is
recommended that refresh the list while you have changed the
connection network.
Add to Profile
A profile stores the setting of a network, so that you can connect to
the network quickly. To add the selected network to a profile, click
this button.
18
6.3. General
To check the connection status of the card, select “General“. This screen shows the information of Link
Speed, Network Type, Encryption Method, SSID, Signal Strength, Link Quality and Network Address of
the card.
Parameter
Description
Status
It will show the connection status of the card.
Speed
It shows the current speed
Type
Infrastructure – This operation mode requires the presence of an
802.11 Access Point. All communication is done via the Access
Point or Router.
IBSS – Select this mode if you want to connect to another
wireless stations in the Wireless LAN network without through an
Access Point or Router.
Encryption
It displays the encryption setting of the current connection
including None, WEP, TKIP or AES.
SSID
The SSID (up to 32 printable ASCII characters) is the unique
name identified in a WLAN. The ID prevents the unintentional
merging of two co-located WLANs.
Signal Strength
It indicates the wireless signal strength.
19
Parameter
Description
Link Quality
It indicates the wireless link quality.
Network Address
It shows the MAC, IP address and other information of the card.
6.4. Profile
The “Profiles List” is for you to manage the networks you connect to frequently. You are able to
Add/Remove/Edit/Duplicate/Set Default to manage a profile.
Parameter
Description
Available Profile(s)
This list shows the preferred networks for the wireless connection.
You can add, remove, edit, duplicate the preferred networks or set
one of the networks as the default connection.
Add/ Remove/ Edit Button
Click these buttons to add/ delete/ edit the selected profiles.
Duplicate
If you like to build up the new profile with the same settings as the
current profile, then you can select this feature.
Set Default
To designate a profile as the default network for the connection
from the available profiles list, click the button.
20
6.4.1. Configure the Profile
Parameter
Description
Profile Name
Define a recognizable profile name for you to identify the different
networks.
Network Name (SSID)
The SSID (up to 32 printable ASCII characters) is the unique
name identified in a WLAN. The ID prevents the unintentional
merging of two co-located WLANs.
You may specify a SSID for the card and then only the device with
the same SSID can interconnect to the card.
This is a computer-to-computer (ad There are two kinds of network type described as follows.
hoc) network; wireless access
Infrastructure – This operation mode requires the presence of an
points are not used.
802.11 Access Point. All communication is done via the Access
Point or Router.
Ad Hoc – Connect to another wireless card in the Wireless LAN
network without through an Access Point or Router.
If this item is selected, the card will work in Ad Hoc mode.
Channel
This setting is only available for Ad Hoc mode. Select the number
of the radio channel used for the networking. The channel setting
should be the same with the network you are connecting to.
21
Parameter
Description
Network Authentication
This setting has to be consistent with the wireless networks that
the card intends to connect.
Open System – No authentication is needed among the wireless
network.
Shared Key – Only wireless stations using a shared key (WEP
Key identified) are allowed to connecting each other.
WPA 802.1X – WPA provides a scheme of mutual authentication
using either IEEE 802.1x/Extensible Authentication Protocol
(EAP) authentication or pre-shared key (PSK) technology. It
provides a high level of assurance to enterprises, small
businesses and home users that data will remain protected and
that only authorized users may access their networks. For
enterprises that have already deployed IEEE 802.1x
authentication, WPA offers the advantage of leveraging existing
authentication databases and infrastructure.
WPA-PSK – It is a special mode designed for home and small
business users who do not have access to network authentication
servers. In this mode, known as Pre-Shared Key, the user
manually enters the starting password in their access point or
gateway, as well as in each wireless stations in the network.
WPA-PSK takes over automatically from that point, keeping
unauthorized users that don’t have the matching password from
joining the network, while encrypting the data traveling between
authorized devices.
WPA2 802.1X – Like WPA, WPA2 supports IEEE 802.1x/EAP
authentication or PSK technology. It also includes a new
advanced encryption mechanism using the Advanced Encryption
Standard (AES). AES is required to the corporate user or
government users. The difference between WPA and WPA2 is that
WPA2 provides data encryption via the AES. In contrast, WPA
uses Temporal Key Integrity Protocol (TKIP).
WPA2-PSK – WPA2-PSK is also for home and small business.
The difference between WPA-PSK and WPA2-PSK is that
WPA2-PSK provides data encryption via the AES. In contrast,
WPA-PSK uses Temporal Key Integrity Protocol (TKIP).
WEP 802.1X – It’s a special mode for using IEEE 802.1x/EAP
technology for authentication and WEP keys for data encryption.
22
Parameter
Description
Data Encryption
Disabled – Disable the WEP Data Encryption.
WEP – Enable the WEP Data Encryption. When the item is
selected, you have to continue setting the WEP Encryption keys.
TKIP – TKIP (Temporal Key Integrity Protocol) changes the
temporal key every 10,000 packets (a packet is a kind of message
transmitted over a network.) This insures much greater security
than the standard WEP security.
AES – AES has been developed to ensure the highest degree of
security and authenticity for digital information and it is the most
advanced solution defined by IEEE 802.11i for the security in the
wireless network.
Note: All devices in the network should use the same encryption
method to ensure the communication.
ASCII
Passphrase
WEP Key can be ASCII format. Alphanumeric values or signs are
allowed to be the WEP key. It is more recognizable for user.
It is a text string with a maximum of 32 alphanumeric characters,
for example: “Test“. The WEP Key is based upon the Passphrase
determined by you. This passphrase may not work with other
vendors’ products due to possible incompatibility with other
vendors’ passphrase generators. You must use the same
passphrase or WEP key settings for all wireless computers within
the network.
Network Key
The keys are used to encrypt data transmitted in the wireless
network. Fill the text box by following the rules below.
64-bit – Input 10-digit Hex values as the encryption keys. For
example: “0123456aef“.
128-bit – Input 26-digit Hex values as the encryption keys. For
example: “01234567890123456789abcdef“.
Confirm Network Key
Enter the same network key to confirm.
Key Index (advanced)
Select one of the four keys to be the data encryption key.
23
Parameter
Description
EAP Type
GTC – GTC is an authentication protocol which allows the
exchange of clear text authentication credentials across the
network.
TLS – TLS is the most secure of the EAP protocols but not easy to
use. It requires that digital certificates be exchanged in the
authentication phase. The server presents a certificate to the
client. After validating the server’s certificate, the client presents a
client certificate to the server for validation.
LEAP – LEAP is a pre-EAP, Cisco-proprietary protocol, with many
of the features of EAP protocols. Cisco controls the ability of other
vendors to implement this protocol, so it should be selected for
use only when limited vendor choice for client, access-point, and
server products is not a concern. When you have set up LEAP
authentication, you have to enter the user name and password of
your computer.
PEAP & TTLS – PEAP and TTLS are similar and easier than TLS
in that they specify a stand-alone authentication protocol be used
within an encrypted tunnel. TTLS supports any protocol within its
tunnel, including CHAP, MSCHAP, MSCHAPv2 and PAP. PEAP
specifies that an EAP-compliant authentication protocol must be
used; this adaptor supports MD5, TLS, GTC (Generic Token Card)
and MSCHAPv2. The client certificate is optional required for the
authentication.
Tunnel
Includes MD5, GTC, TLS, CHAP, MSCHAP, MSCHAP-v2 and
PAP.
Username
The certificate username in the RADIUS server.
Identity
User’s identity in the RADIUS server.
Password
User’s password in the RADIUS server.
Certificate
The certificate for RADIUS server for certification.
24
6.5. Advanced
The “Advanced” option enables you to configure more advanced settings, for example: Power Save,
Turbo Mode, Wireless Mode and etc.
Parameter
Description
Power Save
None – The card will always set in active mode.
Min – Enable the card in the power saving mode when it is idle,
but some components of the card are still alive. In this mode, the
power consumption is larger than “Max“ mode.
Max – Enable the card in the power saving mode when it is idle.
Turbo Mode
Off – Turn off the turbo mode.
On – Turn on the turbo mode.
Auto – The card will detect the AP is RTL8186-based AP or not to
transmit data in turbo mode automatically.
Wireless Mode
802.11 b – This card can be compatible with both 802.11g and
802.11b wireless stations. If there are only 802.11b wireless
stations in the network, you can set the card to this mode.
802.11 g/b – If you have a mix of 802.11b and 802.11g wireless
stations in your network, it is recommended to setting the card to
this mode.
25
Parameter
Description
802.11b Preamble Mode
The preamble defines the length of the CRC block for
communication among the wireless stations. There are three
mode including Long, Short and Auto. High network traffic areas
should use the shorter preamble type. If “Auto“ mode is selected,
the card will auto switch the preamble mode depending on the
wireless stations that the card is connecting to.
Note that the parameter is only active in the Ad Hoc operation
mode.
Fragment Threshold
The value defines the maximum size of packets; any packet size
larger than the value will be fragmented. If you have decreased
this value and experience high packet error rates, you can
increase it again, but it will likely decrease overall network
performance. Select a setting within a range of 256 to 2432 bytes.
Minor change is recommended.
RTS Threshold
Minimum packet size required for an RTS (Request To Send). For
packets smaller than this threshold, an RTS is not sent and the
packet is transmitted directly to the wireless network. Select a
setting within a range of 0 to 2432 bytes. Minor change is
recommended.
Set Defaults
Let the setting values return to default.
Apply
Confirm the settings in the “Advanced“.
26
6.6. Status
This screen shows the information of manufacturer, driver version, settings of the wireless network the
card is connecting to, linking time and link status. If you don’t ensure the status of the card and the
network you are connecting, please go to the screen for more details.
6.7. Statistics
You can get the real time information about the packet transmission and receiving status during
wireless communication from the screen. If you want to recount the statistics value, please click
“Reset“.
27
6.8. Software AP
This card can run as a wireless AP. The relative configurations of the AP including channel, SSID, WEP
encryption and so on are described as follows.
Parameter
Description
SSID
The SSID (up to 32 printable ASCII characters) is the unique
name identified in a WLAN. The ID prevents the unintentional
merging of two co-located WLANs.
The default SSID of the AP is “fae_AP“. Wireless cards connect to
the AP should set up the same SSID as the AP.
BSSID
Display the MAC address of the card.
Associate Table
All the wireless cards connected to the software AP will be
displayed in the list.
Config
Click “Config“ for setting more configuration of the AP.
28
6.8.1. AP Properties Setting
Please refer to Section 3.4.1 for the setting of the parameters for AP. Note that Ad Hoc mode is not
enabled for AP.
6.8.2. AP Advanced
29
Parameter
Description
Beacon Interval
Beacon Interval that specifies the duration between beacon
packets (milliseconds). The range for the beacon period is
between 20-1000 milliseconds with a typical value of 100.
DTIM Period
Determines the interval the Access Point will send its broadcast
traffic. Default value is 3 beacons.
Preamble Mode
The preamble defines the length of the CRC block for
communication among the wireless stations. There are three
mode including Long, Short and Auto. High network traffic areas
should use the shorter preamble type. If “Auto“ mode is selected,
the AP will auto switch the preamble mode depending on the
wireless cards.
Set Defaults
Set the setting values return to defaults.
Apply
Confirm the settings in the “Advanced“.
6.8.3. AP Statistics
You can get the real time information about the packet transmission and receiving status during
wireless communication from the screen. If you want to recount the statistics value, please click
“Reset“.
30
6.8.4. SoftAP
If you want to connect to the internet through this SoftAP, you will need to make a bridge between our
SoftAP and your internet connect. Select the internet connection in your SoftAP host machine and
press the “Apply” button.
31
7. RT-Set Wizard
The RT-Set wizard can help users to connect to a wireless LAN or build an Ad-hoc wireless network.
For example, if you want to connect to a wireless LAN in infrastructure mode: A.
Open the RT-Set wizard and choose the Station (infrastructure) mode.
B. The site survey results will show up. Please select the one you’d like to connect to and click the
“Next” button.
32
C. In the Wireless network properties dialog, please fill in the security settings for this wireless network
you’d like to connect to.
D. Please specify the IP settings for this wireless network and click the “Finish” button.
33
E. Now you can connect to the wireless network successfully.
34
8. 5 Troubleshooting
This chapter provides solutions to problems usually encountered during the installation and operation
of the card.
1.
What is the IEEE 802.11g standard?
802.11g is the new IEEE standard for high-speed wireless LAN communications that provides for
up to 54 Mbps data rate in the 2.4 GHz band. 802.11g is quickly becoming the next mainstream
wireless LAN technology for the home, office and public networks.
802.11g defines the use of the same OFDM modulation technique specified in IEEE 802.11a for
the 5 GHz frequency band and applies it in the same 2.4 GHz frequency band as IEEE 802.11b.
The 802.11g standard requires backward compatibility with 802.11b.
The standard specifically calls for:
A.
A new physical layer for the 802.11 Medium Access Control (MAC) in the 2.4 GHz frequency
band, known as the extended rate PHY (ERP). The ERP adds OFDM as a mandatory new
coding scheme for 6, 12 and 24 Mbps (mandatory speeds), and 18, 36, 48 and 54 Mbps
(optional speeds). The ERP includes the modulation schemes found in 802.11b including
CCK for 11 and 5.5 Mbps and Barker code modulation for 2 and 1 Mbps.
B. A protection mechanism called RTS/CTS that governs how 802.11g devices and 802.11b
devices interoperate.
2.
What is the IEEE 802.11b standard?
The IEEE 802.11b Wireless LAN standard subcommittee, which formulates the standard for the
industry. The objective is to enable wireless LAN hardware from different manufactures to
communicate.
3.
What does IEEE 802.11 feature support?
The product supports the following IEEE 802.11 functions:
4.
CSMA/CA plus Acknowledge Protocol
Multi-Channel Roaming
Automatic Rate Selection
RTS/CTS Feature
Fragmentation
Power Management
What is Ad-hoc?
An Ad-hoc integrated wireless LAN is a group of computers, each has a Wireless LAN card,
Connected as an independent wireless LAN. Ad hoc wireless LAN is applicable at a
departmental scale for a branch or SOHO operation.
5.
What is Infrastructure?
An integrated wireless and wireless and wired LAN is called an Infrastructure configuration.
Infrastructure is applicable to enterprise scale for wireless access to central database, or
wireless application for mobile workers.
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6.
What is BSS ID?
A specific Ad hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be
configured with the same BSS ID.
7.
What is WEP?
WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 40 bit shared key
algorithm, as described in the IEEE 802 .11 standard.
8.
What is TKIP?
TKIP is a quick-fix method to quickly overcome the inherent weaknesses in WEP security,
especially the reuse of encryption keys. TKIP is involved in the IEEE 802.11i WLAN security
standard, and the specification might be officially released by early 2003.
9.
What is AES?
AES (Advanced Encryption Standard), a chip-based security, has been developed to ensure the
highest degree of security and authenticity for digital information, wherever and however
communicated or stored, while making more efficient use of hardware and/or software than
previous encryption standards. It is also included in IEEE 802.11i standard. Compare with AES,
TKIP is a temporary protocol for replacing WEP security until manufacturers implement AES at
the hardware level.
10. Can Wireless products support printer sharing?
Wireless products perform the same function as LAN products. Therefore, Wireless products can
work with Netware, Windows 2000, or other LAN operating systems to support printer or file
sharing.
11. Would the information be intercepted while transmitting on air?
WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence
Spread Spectrum technology, it has the inherent security feature of scrambling. On the software
side, WLAN series offer the encryption function (WEP) to enhance security and Access Control.
Users can set it up depending upon their needs.
12. What is DSSS?What is FHSS?And what are their differences?
Frequency-hopping spread-spectrum (FHSS) uses a narrowband carrier that changes frequency
in a pattern that is known to both transmitter and receiver. Properly synchronized, the net effect
is to maintain a single logical channel. To an unintended receiver, FHSS appears to be
short-duration impulse noise. Direct-sequence spread-spectrum (DSSS) generates a redundant
bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The
longer the chip is, the greater the probability that the original data can be recovered. Even if one
or more bits in the chip are damaged during transmission, statistical techniques embedded in the
radio can recover the original data without-the need for retransmission. To an unintended
receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most
narrowband receivers.
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13. What is Spread Spectrum?
Spread Spectrum technology is a wideband radio frequency technique developed by the military
for use in reliable, secure, mission-critical communication systems. It is designed to trade off
bandwidth efficiency for reliability, integrity, and security. In other words, more bandwidth is
consumed than in the case of narrowband transmission, but the trade off produces a signal that
is, in effect, louder and thus easier to detect, provided that the receiver knows the parameters of
the spread-spectrum signal being broadcast. If a receiver is not tuned to the right frequency, a
spread –spectrum signal looks like background noise. There are two main alternatives, Direct
Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).
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