ASUS USB-N11 Adapter User Manual PDF

Pages 42
Year 2009
Language(s)
English en
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Summary of Content for ASUS USB-N11 Adapter User Manual PDF

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Technical Support Component Telephone +49-1805-010923 System/Notebook /Eee/LCD Telephone +49-1805-010920 Support Fax +492102959911 Online support www... asus... com... de/support Website www... asus... com... de/news

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CAD... NO... 10 AYAZAGA/ISTANBUL INDEX BILGISAYAR SISTEMLERI MUHENDISLIK SAN... VE TIC... A... S... Tel: +90 212 3312121 Address: AYAZAGA MAH: CENDERE YOLU

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ASUS Wireless Settings Utility ... 13 Status - Status ... 13 Status - Connection ... 15 Status - IP Config ... 16 Status - Ping ... 16 Config - Basic ... 17 Config - Advanced ... 18 Config - Encryption ... 19 Config - Authentication ... 22 Profiles ... 23 Survey - Site Survey ... 24 About - Version Info ... 25 Link State ... 26 Exit Wireless Settings ... 26 Windows XP Wireless Options ... 27 Windows Vista Wireless Options ... 29

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1... Introduction Package contents Check the following items in your ASUS Wireless LAN Adapter package... Contact your retailer if any item is damaged or missing... 1 x ASUS Wireless LAN Adapter (USB-N11) 1 x Support CD 1 x Quick Start Guide 1 x USB Cable

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Installing the WLAN utilities and driver Follow these instructions to install the WLAN Adapter utilities and driver... Insert the support CD into your optical drive... If autorun is enabled in your computer, the CD automatically displays the utility menu... Clickmatically displays the utility menu... Click Install ASUS WLAN Card Utilities/Driver... If autorun is disabled, double-click SETUP... EXE in the root directory of the CD...

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Notes: For Mac user, click Explore this CD to download Mac driver and utility... Then follow the instructions to install the WLAN utilities and driver... For Linux user, download the Linux driver source code form CD, and build the driver for the Linux OS you are using...

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WPS Push Button Use the WPS Push Button to set up your wireless connection with an existing wireless LAN... 1... Push and hold the WPS Push Button on the USB

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4... Encryption settings must match those at the access point... Ask your network administrator about settings if necessary... Click Apply to activate the settings...

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4... If the encryption settings of your WLAN Adapter are different from those of the other Ad Hoc nodes, you are prompted to make the encryption of the two nodes identical... Click Apply to activate the settings...

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ASUS WLAN Control Center ASUS WLAN Control Center is an application which makes it easier to launch WLAN applications and activate network location settings... The WLAN Control Center starts automatically when system boots... When WLAN Control Center is running, you can see a Control Center icon on the Windows taskbar...

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Taskbar icon - Right-click menu Right-click the taskbar icon to show the following menu items: Wireless Settings Click to launch Wireless Settings application... Activate Configuration Click to choose a preset profile... WPS Click to launch Wireless Protected Setup application... Preferences Click to customize the Control Center program... You can

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ASUS Wireless Settings Utility Wireless Settings is an application for managing the WLAN Adapter... Use Wireless Settings to view or modify the configuration settings, or to monitor the operational status of your WLAN Adapter... When Wireless Settings is launched, you can see the tabbed property sheets which categorize the configuration options into groups... Starting Wireless Settings Click the Windows Start button, select Programs | ASUS Utility |

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Buttons Rescan Make the WLAN Adapter rescan all available devices... If the current link quality or signal strength is poor, rescanning can be used to push the radio off a weak access point and search for a better link with another access point... This function usually takes several seconds... Change SSID Click this button to set the SSID to that of the AP you want to connect... Search & Connect Click this button to connect to an available wireless AP...

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Activate Configuration Auto roaming is enabled by default and makes the adapter automatically switch to APs with better signal... You can uncheck it if you want to connect to a specified AP using a particular profile...

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to send, and the timeout value (in milliseconds)... 3... Click the Ping button... During the ping session, the Ping button Changes into a Stop button... To cancel the ping session, click the Stop button... The session field displays information on the verified connection including the roundtrip time (minimum, maximum, and average) and packets sent, received, and lost after a ping session... Click the Clear button to clear the session field...

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Network Name (SSID) SSID stands for Service Set Identifier, which is a string used to identify a wireless LAN... Use the SSID to connect with a known access point... You can enter a new SSID or select one from the drop-down list box... If you get connected by designating the SSID, you are only to connect the AP with the SSID you assigned... If the AP is removed from the network, your WLAN Adapter does not roam automatically to other APs... SSIDs must all be printable characters and having a maximum of 32 case sensitive characters, such as Wireless...

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Fragmentation Threshold (26-246) Fragmentation is used to divide 802... 11 frames into smaller pieces (fragments) that are sent separately to the destination... Enable fragmentation by setting a specific packet size threshold... If there is an excessive number of collisions on the WLAN, experiment with different fragmentation values to increase the reliability of frame transmissions... The default value (2346) is recommended for normal use...

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Network Authentication Since there is no precise bound in wireless LANs, the WLAN users need to implement certain mechanism to provide security solution... The Authentication policies in this tab provide protection of different levels such as Open, Shared, WPA-PSK, WPA, WPA2 and WPA2-PSK... Open - Select this option to make the network operate on Open System mode, which use no authentication algorithm... Open stations and APs can authenticate with each other without checking any WEP Key, even if there is... Shared - Select this option to make the network operate on Shared key mode... In a Share Key Authentication system, four-step exchange of frames is required to validate that the station is using the same WEP Key as the access point... WPA-PSK/ WPA2-PSK - Select this option to enable WPA Pre-Shared Key under Infrastructure mode... It enables communication between your client and APs using WPA-PSK/WPA2-PSK encryption mode... WPA/ WPA2 - The network is operating in IEEE 802... 1x authentication mode... This mode is for environments with RADIUS (Remote Access Dial-in User Service)... In a RADIUS environment, five Extensible Authentication Protocol (EAP) are supported, including PEAP, TLS/Smart Card, TTLS, LEAP and Md5- Challenge...

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Data encryption For Open and Shared authentication mode, the configuration options of encryption type are Disabled and WEP... For WPA, WPA-PSK, WPA2 and WPA2-PSK authentication mode, Temporal Key Integrity Protocol (TKIP) encryption and Advanced Encryption Standard (AES) encryption are supported... Disabled - Disable the encryption function... WEP - WEP Key is used to encrypt your data before it is transmitted over air... You can only connect and communicate with wireless devices that use the same WEP keys... TKIP - TKIP uses an encryption algorithm method that is more stringent than the WEP algorithm... It also uses existing WLAN calculation facilities to perform encryption... TKIP verifies the security configuration after the encryption keys are determined... AES: AES is a symmetric 128-bit block encryption technique that works simultaneously on multiple network layers...

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64/128bits versus 40/104bits There are two levels of WEP Encryption: 64 bits and 128 bits... Firstly, 64 bit WEP and 40 bit WEP are the same encryption method and can interoperate in the wireless network... This lower level of WEP encryption uses a 40 bit (10 Hex character) as a secret key (set by user), and a 24 bit Initialization Vector (not under user control)... This together makes 64 bits (40 + 24)... Some vendors refer to this level of WEP as 40 bits and others refer to this as 64 bits... Our Wireless LAN products use the term 64 bits when referring to this lower level of encryption... Secondly, 104 bit WEP and 128 bit WEP are the same encryption method and can interoperate in the wireless network... This higher level of WEP encryption uses a 104 bit (26 Hex character) as a secret key (set by user), and a 24 bit Initialization Vector (not under user control)... This together makes 128 bits (104 + 24)... Some vendors refer to this level of WEP as 104 bits and others refer to this as 128 bits... Our Wireless LAN products use the term 128 bits when referring to this higher level of encryption...

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Authentication Type The authentication type methods include: PEAP: PEAP (Protected Extensible Authentication Protocol) authentication is a version of Extensible Authentication Protocol (EAP)... EAP ensures mutual authentication between a wireless client and a server that resides at the network operations center... TLS: TLS (Transport Layer Security) authentication is used to create an encrypted tunnel and achieve server-side authentication in a manner similar to Web server authentication using Secure Sockets Layer (SSL) protocol... This method uses digital certificates to verify the identity of a client and server... TTLS: TTLS authentication uses certificates to authenticate the server, while maintaining similar security properties to TLS such as mutual authentication and a shared confidentiality for session WEP key...

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Wi-Fi Protected Setup (WPS) To set up WPS, you can either: Use the WPS Push Button on the adapter... From the Profiles tab, click WPS to start the WPS wizard...

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Survey - Site Survey Use the Site Survey tab to view statistics on the wireless networks available to the WLAN adapter and their parameters...

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About - Version Info Use the Version Info tab to view program and WLAN Adapter version information... The program version information field includes the Copyright and utility version... The version information includes the NDIS version, driver name, driver version and hardware version...

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Link State WLAN Adapter Link State icon appears on the left side of the WLAN Adapter Settings... Use the icon to view the current signal status...

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Windows XP Wireless Options The wireless options window shown below is only available for Windows XP... It appears when you run the Control Center utility at the first time... Select the utility you want to use for configuring your WLAN Adapter... Only use Windows wireless function Only use Windows XP Wireless Zero Configuration service to configure the WLAN Adapter... Only use our WLAN utilities and disable Windows wireless function Only use ASUS WLAN utilities to configure the WLAN Adapter...

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2... Select Wireless Networks tab to show Preferred networks... Use the Add button to add the SSID of available networks and set the connection preference order with the Move up and Move down buttons... The radio tower with a signal icon identifies the currently connected access point... Click Properties to set the authentication of the wireless connection...

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1... The General page shows status,SSID, duration, speed, and signal strength... The green bars represent signal strength, with 5 bars indicating excellent signal and 1 bar meaning poor signal...

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Verify if the WLAN Adapter is installed correctly... When the WLAN Adapter setup is complete, you can verify if the driver has been setup properly... Right click My Computer, select Properties, and click the Device Manager tab... Then double-click the Network adapters icon; you should see 802... 11g Network Adapter with an icon of an expansion adapter... There should not be a ! or ? (problem) or x (disabled) symbol over this icon...

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The TCP/IP protocol did not bind to the WLAN PC Adapter... This will occur when the computer already has six TCP/IP bindings in Windows 98 or ten bindings in Windows Me... These limits are imposed by the Microsoft operating system... Solution: If your computer already has the maximum number of TCP/IP bindings, remove one of the network adapters from the Network configuration before installing the WLAN Adapter driver...

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COFDM (for 802... 11a or 802... 11g) Signal power alone is not enough to maintain 802... 11b-like distances in an 802... 11a/g environment... To compensate, a new physical-layer encoding technology was designed that departs from the traditional direct-sequence technology being deployed today... This technology is called COFDM (coded OFDM)... COFDM was developed specifically for indoor wireless use and offers performance much superior to that of spread-spectrum solutions... COFDM works by breaking one high-speed data carrier into several lower-speed subcarriers, which are then transmitted in parallel... Each high-speed carrier is 20 MHz wide and is broken up into 52 subchannels, each approximately 300 KHz wide... COFDM uses 48 of these subchannels for data, while the remaining four are used for error correction... COFDM delivers higher data rates and a high degree of multipath reflection recovery, thanks to its encoding scheme and error correction...

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Each subchannel in the COFDM implementation is about 300 KHz wide... At the low end of the speed gradient, BPSK (binary phase shift keying) is used to encode 125 Kbps of data per channel, resulting in a 6,000-Kbps, or 6 Mbps, data rate... Using quadrature phase shift keying, you can double the amount of data encoded to 250 Kbps per channel, yielding a 12-Mbps data rate... And by using 16-level quadrature amplitude modulation encoding 4 bits per hertz, you can achieve a data rate of 24 Mbps... The 802... 11a/g standard specifies that all 802... 11a/g-compliant products must support these basic data rates... The standard also lets the vendor extend the modulation scheme beyond 24 Mbps... Remember, the more bits per cycle (hertz) that are encoded, the more susceptible the signal will be to interference and fading, and ultimately, the shorter the range, unless power output is increased...

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Direct-sequence systems communicate by continuously transmitting a redundant pattern of bits called a chipping sequence... Each bit of transmitted data is mapped into chips and rearranged into a pseudorandom spreading code to form the chipping sequence... The chipping sequence is combined with a transmitted data stream to produce the output signal... Wireless mobile clients receiving a direct-sequence transmission use the spreading code to map the chips within the chipping sequence back into bits to recreate the original data transmitted by the wireless device... Intercepting and decoding a direct- sequence transmission requires a predefined algorithm to associate the spreading code used by the transmitting wireless device to the receiving wireless mobile client... This algorithm is established by IEEE 802... 11b specifications... The bit redundancy within the chipping sequence enables the receiving wireless mobile client to recreate the original data pattern, even if bits in the chipping sequence are corrupted by interference... The ratio of chips per bit is called the spreading ratio... A high spreading ratio increases the resistance of the signal to interference... A low spreading ratio increases the bandwidth available to the user... The wireless device uses a constant chip rate of 11Mchips/s for all data rates, but uses different modulation schemes to encode more bits per chip at the higher data rates... The wireless device is capable of an 11 Mbps data transmission rate, but the coverage area is less than a 1 or 2 Mbps wireless device since coverage area decreases as bandwidth increases...

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IEEE 802... 11a (4Mbits/sec) Compared with 802... 11b: The 802... 11b standard was designed to operate in the 2... 4-GHz ISM (Industrial, Scientific and Medical) band using direct-sequence spread-spectrum technology... The 802... 11a standard, on the other hand, was designed to operate in the more recently allocated 5-GHz UNII (Unlicensed National Information Infrastructure) band... And unlike 802... 11b, the 802... 11a standard departs from the traditional spread-spectrum technology, instead using a frequency division multiplexing scheme that's intended to be friendlier to office environments... The 802... 11a standard, which supports data rates of up to 54 Mbps, is the Fast Ethernet analog to 802... 11b, which supports data rates of up to 11 Mbps... Like Ethernet and Fast Ethernet, 802... 11b and 802... 11a use an identical MAC (Media Access Control)... However, while Fast Ethernet uses the same physical-layer encoding scheme as Ethernet (only faster), 802... 11a uses an entirely different encoding scheme, called OFDM (orthogonal frequency division multiplexing)...

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The 802... 11b spectrum is plagued by saturation from wireless phones, microwave ovens and other emerging wireless technologies, such as Bluetooth... In contrast, 802... 11a spectrum is relatively free of interference... The 802... 11a standard gains some of its performance from the higher frequencies at which it operates... The laws of information theory tie frequency, radiated power and distance together in an inverse relationship... Thus, moving up to the 5-GHz spectrum from 2... 4 GHz will lead to shorter distances, given the same radiated power and encoding scheme... Compared with 802... 11g: 802... 11a is a standard for access points and radio NICs that is ahead of 802... 11g in the market by about six months... 802... 11a operates in the 5GHz frequency band with twelve separate non-overlapping channels... As a result, you can have up to twelve access points set to different channels in the same area without them interfering with each other... This makes access point channel assignment much easier and significantly increases the throughput the wireless LAN can deliver within a given area... In addition, RF interference is much less likely because of the less-crowded 5 GHz band...

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NAT (Network Address Translation) NAT masks a local networks group of IP addresses from the external network, allowing a local network of computers to share a single ISP account... This process allows all of the computers on your home network to use one IP address... This will enable access to the Internet from any computer on your home network without having to purchase more IP addresses from your ISP...

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SSID (Service Set Identifier) SSID is a group name shared by every member of a wireless network... Only client PCs with the same SSID are allowed to establish a connection... Enabling the Response to Broadcast SSID requests option allows the device to broadcast its SSID in a wireless network... This allows other wireless devices to scan and establish communication with the device... Unchecking this option hides the SSID to prevent other wireless devices from recognizing and connecting to the device...

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Requirements (1) A WPA compatible access point or Wireless router, (2) Operating system updates that support WPA... In XP, an updated Windows Zero Config service is needed... Users can download the Windows XP WPA patch here: http://microsoft... com/downloads/details... aspx?FamilyId=009D8425-CE2B-47A4- ABEC-274845DC9E91&displaylang=en Please note that this patch requires the installation Windows XP Service Pack 1, which is available here: http://www... microsoft... com/WindowsXP/pro/downloads/ servicepacks/sp1/default... asp For earlier Windows Operating systems, a WPA capable supplicant is required such as Funk Softwares Odyssey Client...

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This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the 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:

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Testing for electric safety according to EN 60950-1 has been conducted... These are considered relevant and sufficient... Protection requirements for electromagnetic compatibility Article 3... 1b Testing for electromagnetic compatibility according to EN 301 489-1 and EN 301 489-17 has been conducted... These are considered relevant and sufficient... Effective use of the radio spectrum Article 3... 2 Testing for radio test suites according to EN 300 328- 2 has been conducted... These are considered relevant and sufficient...

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