ASUS USB-N66 Adapter User Manual PDF

Pages 35
Year 2012
Language(s)
English en
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Summary of Content for ASUS USB-N66 Adapter User Manual PDF

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ASUS WLAN Adapter Setting Utility ... 12 Survey ... 13 Configuration- Basic ... 14 Configuration - Encryption ... 15 Configuration - Advanced ... 16

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Windows XP/ Vista/7 USB 2... 0 portUSB 2... 0 port 512MB system memory or larger512MB system memory or larger Optical disk driveOptical disk drive

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Mounting options Out of the box, the ASUS USB-N66 is designed to sit on a raised flat surface like a file cabinet or book shelf... The unit may also be converted for mounting to a wall or ceiling... 1... Look on the underside for the mounting hook...

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1... Place the bundled Support CD into the optical drive... An Autorun screen appears if the Autorun function is enabled on your computer...

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2... ou may clickou may click Survey > Search to search for the wireless networks... Select an Access Point (AP) from the network list and then click Connect...

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3... If Security is enabled on the AP or station, do the same security settings on your WLAN adapter as those on the AP or station... Click Save...

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3... Press the WPS button on the AP or station to establish a wireless connection...

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IMPORTANT: Before configuring the Soft AP mode, connect your host computer to a wired network to provide internet network access for your wireless clients...

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In the Soft AP mode, you can limit the wireless clients that associate with the USB-N66 through the access control function... Click Configuration > Edit Config > Wireless Mode...

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To launch WLAN utility, click Start > All Programs > ASUS Utility > USB-N66 WLAN Adapter Utilities > ASUS USB-N66 WLAN Control Center... In the default Station mode, the ASUS WLAN Adapter Setting Utility icon displays as shown on the right...

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MAC Address - Indicates the hardware address of the WLAN adapter... A MAC address is a unique identifier assigned to networking devices... It consists of six groups of two hexadecimal digits (0 through 9 and A through F) separated by colons, e... g... 00:E0:18:F0:05:C0...

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Channel - Select a radio channel for your WLAN adapter... In the Infrastructure mode, your WLAN adapter automatically selects the correct channel required to communicate with an AP and this field shows Auto... In the Ad Hoc mode, you are allowed to select a channel for your WLAN adapter... WLAN cards in the same network can communicate with each other if they have the same channel setting...

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Configuration - Encryption The Encryption page allows you to set up the encryption settings for your WLAN adapter... For data confidentiality in a wireless environment, IEEE 802... 11 specifies a Wired Equivalent Privacy (WEP) algorithm to offer transmission privacy similar to wired network... WEP uses keys to encrypt data packets sent and decrypt data packets received... The encryption process can scramble frame bits to avoid disclosure to others... Wi-Fi Protected Access (WPA) is an improved security system for 802... 11 that encrypts data sent over radio waves... WPA is developed to overcome the weakness of the WEP protocol... Network Authentication - Set up authentication for your WLAN adapter...

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Fragmentation Threshold (256-2346) -Fragmentation Threshold (256-2346) - Fragmentation is used to divide 802... 11 frames into smaller pieces (fragments) that are sent separately to the destination... To enable fragmentation, set 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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1... Right-click the ASUS WLAN Control Center system tray icon, then click Exit... ASUS WLAN Control Center will be switched off...

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6... Troubleshooting This chapter provides solutions to problems which you may encounter when installing or using ASUS USB-N66... Contact a qualified service technician for assistance if the problem still exists after you have performed the troubleshooting solutions...

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The TCP/IP protocol does not bind to the WLAN adapter... This occurs when your PC 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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Channel An instance of medium use for the purpose of passing protocol data units that may be used simultaneously, in the same volume of space, with other instances of medium use (on other channels) by other instances of the same physical layer, with an acceptably low frame error ratio due to mutual interference...

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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 lowerspeed subcarriers, which are then transmitted in parallel... Each high-speed carrier is 20MHz wide and is broken up into 52 subchannels, each approximately 300KHz 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... Each subchannel in the COFDM implementation is about 300KHz wide... At the low end of the speed gradient, BPSK (binary phase shift keying) is used to encode 125Kbps of data per channel, resulting in a 6,000Kbps, or 6Mbps, data rate... Using quadrature phase shift keying, you can double the amount of data encoded to 250Kbps per channel, yielding a 12Mbps data rate... And by using 16-level quadrature amplitude modulation encoding 4bits per hertz, you can achieve a data rate of 24Mbps... 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 24Mbps... 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 Spread Spectrum (for 802... 11b) Spread spectrum (broadband) uses a narrowband signal to spread the transmission over a segment of the radio frequency band or spectrum... Direct- sequence is a spread spectrum technique where the transmitted signal is spread over a particular frequency range... 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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Encryption This provides wireless data transmissions with a level of security... This option allows you to specify a 64-bit or a 128-bit WEP key... A 64-bit encryption contains 10 hexadecimal digits or 5 ASCII characters... A 128-bit encryption contains 26 hexadecimal digits or 13 ASCII characters... 64-bit and 40-bit WEP keys use the same encryption method and can interoperate on wireless networks... This lower level of WEP encryption uses a 40-bit (10 hexadecimal digits assigned by the user) secret key and a 24-bit Initialization Vector assigned by the device... 104-bit and 128-bit WEP keys use the same encryption method... All wireless clients in a network must have identical WEP keys with the access point to establish connection... Keep a record of the WEP encryption keys...

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IEEE 802... 11a (54Mbits/sec) Compared with 802... 11b: The 802... 11b standard was designed to operate in the 2... 4GHz ISM (Industrial, Scientific and Medical) band using direct-sequence spreadspectrum 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 thats 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)... 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 5GHz spectrum from 2... 4GHz will lead to shorter distances, given the same radiated power and encoding scheme...

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IEEE 802... 11b (11Mbits/sec) In 1997, the Institute of Electrical and Electronics Engineers (IEEE) adopted the 802... 11 standard for wireless devices operating in the 2... 4 GHz frequency band... This standard includes provisions for three radio technologies: direct sequence spread spectrum, frequency hopping spread spectrum, and infrared... Devices that comply with the 802... 11 standard operate at a data rate of either 1 or 2 Mbps... In 1999, the IEEE created the 802... 11b standard... 802... 11b is essentially identical to the 802... 11 standard except 802... 11b provides for data rates of up to 11Mbps for direct sequence spread spectrum devices... Under 802... 11b, direct sequence devices can operate at 11Mbps, 5... 5Mbps, 2Mbps, or 1Mbps... This provides interoperability with existing 802... 11 direct sequence devices that operate only at 2Mbps... Direct sequence spread spectrum devices spread a radio signal over a range of frequencies... The IEEE 802... 11b specification allocates the 2... 4GHz frequency band into 14 overlapping operating Channels... Each Channel corresponds to a different set of frequencies...

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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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PCMCIA (Personal Computer Memory Card International Association) The Personal Computer Memory Card International Association (PCMCIA), develops standards for PC cards, formerly known as PCMCIA cards... These cards are available in three types, and are about the same length and width as credit cards... However, the different width of the cards ranges in thickness from 3... 3 mm (Type I) to 5... 0 mm (Type II) to 10... 5 mm (Type III)... These cards can be used for various functions, including memory storage, land line modems and wireless modems...

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WPA (Wi-Fi Protected Access) Wi-Fi Protected Access (WPA) is an improved security system for 802... 11... It is part of the 802... 11i draft security standard... WPA encompasses TKIP (Temporal Key Integrity Protocol) along with MIC (Message Integrity Check) and other fixes to WEP such as Weak IV (Initialization Vector) filtering and Random IV generation... TKIP uses 802... 1x to deploy and change temporary keys as opposed to static WEP keys once used in the past... It is a significant improvement over WEP... WPA is part of a complete security solution... WPA also requires authentication servers in enterprise security solutions...

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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: Reorient or relocate the receiving antenna...

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rcle 14 The application of low power frequency electric machineries shall not affect the navigation safety nor interfere a legal communication, if an interference is found, the service will be suspended until improvement is made and the interference no longer exists...

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IC Radiation Exposure Statement: This equipment complies with IC RSS-102 radiation exposure limits set forth for an uncontrolled environment... This equipment should be installed and operated with minimum distance 20cm between the radiator & your body... Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device...

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Ce priphrique a t valu et dmontr conforme aux limites SAR (Specific Absorption Rate Taux dabsorption spcifique) dIC lorsquil est install dans des produits htes particuliers qui fonctionnent dans des conditions dexposition des appareils portables (les antennes se situent moins de 20 centimtres du corps dune personne)... Ce priphrique est homologu pour lutilisation au Canada... Pour consulter lentre correspondant lappareil dans la liste dquipement radio (REL - Radio Equipment List) dIndustry Canada rendez-vous sur: http://www... ic... gc... ca/app/sitt/reltel/srch/nwRdSrch... do?lang=eng Pour des informations supplmentaires concernant lexposition aux RF au Canada rendezvous sur : http://www... ic... gc... ca/eic/site/smt-gst... nsf/eng/sf08792... html

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ASUS COMPUTER INTERNATIONAL (America) Address 00 Corporate Way, Fremont, CA 3, USA Telephone +10203 Fax +1023313 Website usa... asus... com Online support support... asus... com

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CAD... NO... 10 AYAZAGA/ISTANBUL CIZGI Elektronik San... Tic... Ltd... Sti... Tel: +0 212 3600 Address: CEMAL SURURI CD... HALIM MERIC

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