Edimax EW-7728In manuale d’uso

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Copyright  by Edimax T echnology Co, L TD. all rights reserv ed. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, o r translated into any language or computer language, in any form or by any means, ele ctronic, me chanical, magnetic, optical, chemical, manual or otherwise, without the prior w[...]

Federal Communication Commission Interference Statement This equipment has been tested and found to com pl y with th e limits for a Class B digital dev ice, pursuant to Part 15 of FCC Rules. These limit s are designed to provide reasonable protection against harmful interference in a residential installation. T his equipment generates, uses, a nd c[...]

Federal Communic ation Commission ( FCC) Radiation Exposure S tatement This equipment complies with FCC radiation exposure set forth for an uncontrolled environment. In order to avoid the possibility of exceeding the FCC radio f requency exposure li mits, hu man proximity to the antenna shall n ot be less than 20cm (8 inches) during normal operatio[...]

R&TTE Compliance Statement This equipment complies with all the requirements o f DIRECTIVE 1999/5/E C OF THE EUROPE AN P ARLIAMENT 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 9[...]

C A T A L O G CHAPTER I: Product Information .............................................................. 1 1-1 Introduction and safety information ................................................................ 1 1-2 Safety Information ........................................................................................... 2 1-3 System Requi[...]

CHAPTER IV : Appendix ............................................................................ 74 4-1 Specification .................................................................................................. 74 4-2 T roubleshooting ............................................................................................. 75 4-3 Glossa[...]

1 CHAPTER I: Pr o duct Information 1-1 Introducti on and safe ty information Thank you for purchasing Edim ax wireless high-speed wirele ss network PCI card! Excepting comm on wireless standards 802.1 1b/g, this wireless network card is also able to access 802.1 1n wireless n etworks - data transfer rate is 1 50Mbps(EW -7128Gn)/300Mbps(EW -7722In),[...]

2 1-2 Safety Info rmation In order to keep th e safety of users and y ou r properties, p lease follow t he following safety in structions : 1. This wireles s network car d is designe d for indoor u se o nly . DO NOT expose this ne t work card to direct s un light, rain, or snow . 2. DO NO T put this network card a t or near hot or h u mid places, l[...]

3 1-3 System Requirements  An em pty PCI slot  W ind ows 2000, XP , V ista, or W indows 7 operating sy stem  CD -ROM drive  At least 100M B of available d isk space[...]

4 1-4 Package Co ntents Before y ou starting to use thi s wireless netw o rk card, please c h eck if there ‟ s anything m iss ing in the pac kage, and contac t your dealer of purchase to cla im for m issi ng item s: □ PCI W ireless Network Card (1 p cs) …………………… ……… . 1 □ 2dBi Antenna (1 pcs for EW -7128Gn ) …………[...]

5 1-5 Fam i liar with your new wirele ss network car d Exam ple : EW -7722In 1. Ante nnas One 3dBi dipo le antenna is enclosed with t he PCI card. Plea s e secure the antenna to Reve rse SMA connector of the card . 2. W PS Button Press this butto n and hold for 3 seco nds to start WPS function. When WPS is enabled, the Link and Tx/Rx LED s will be [...]

6 CHAPTER II: D ri ver I nstallation and Configur ation 2- 1 Networ k Card Installa t ion Please follow t he following instructions t o install y ou r new wireless network car d: 1. SW ITCH THE COMPUTER O FF , remove the co ver and insert t he wireless network ca rd into an em pty PCI slot of y our com puter and then replace the cover . 2. Insta ll[...]

7 3. W hen you restar t the com p uter , th is „ Found New Hardware W izard ‟ screen will appear , click „ Cancel ‟ .[...]

8 Y ou can install t he W ireless Adapter by EZMAX Set up W i zard in the CD -ROM including in the package. The wizard is an easy and quick configuration tool for internet connection with serie s process. When you start EZMAX Setup W izard, you will get the fol lowing welco me screen. Please choose t he la nguage to start the configuration. The wiz[...]

9 4. Insert d evice driver C DROM into the CD/DVD ROM drive of your computer , a nd execute „ Setup.exe ‟ program . Pleas e read the end u ser license agreem ent and clic k „ I accept the term s of the license agreement ‟ then click „ Next ‟ but ton, to accept lice ns e agreem ent. 5. It is rec ommend installing driver and uti lity if t[...]

10 6. Y ou can choose the conf iguration tool use d to configure t h e wireless network car d here. It ‟ s recommended t o select „ Ralink Conf iguration T ool ‟ , which provides fully access to all functions o f this wirele ss network car d. If you prefer t o use the wire l ess configurat ion tool provided by W indows XP , please select „ [...]

11 8. Plea se wait while t h e install proc edure is running. When you see this message, plea se click „ Finish ‟ to complete the driver i n stallation process.[...]

12 9. After i nstallation is com plete, wireless configura tion utility will be shown in the de sktop of your computer autom atically . Y ou will also see an icon at th e lower-r ight corner of your w indows system . If you put the m o use cursor on the ic on, the status of wireless card will be displayed as a p o pup balloon. When y ou want to con[...]

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14 2- 2 Usin g the W i reless Config uration Utility There are two way s you can configure y o ur wireless networ k card to connect to wi reless access p oint: using the Edimax configurati on utility and using built-in w indows zero c onfiguration utility .[...]

15 2-2-1 Using Edim ax Utility Please follow t he following instructions t o use Edim ax configuration utility to conn ect to wireles s access point. 1. Righ t-click the Edimax c onfiguration utility icon l ocated at lower -right cor ner of com pu ter desktop and then clic ks „ Launch Config Utility ‟ . 2. Edim ax setup utility will la unch, an[...]

16 Y ou can clic k „ More / Less ‟ butt on again, and se t up utility w i ndow will resum e to its original size. T ip: If a setup item r equir es m or e information to c o mplete the setup pr ocedur e, the setup utility window will ex pand automat ically .[...]

17 2-2-1-1 Scan for Ot her W ireless Devices There are two kinds of w ireless connecti on m ode: Infrastructure and Ad -Hoc. Infrastruct ure mode is u sed by w ireless access points, which is able to establi sh wireless connect ion for y ou and other wirele ss / wired network clie nts. Ad -Hoc mode is als o know as „ point- to - point‟ mode, an[...]

18 Scan results w ill be display ed here, please check if the wire l ess device (access point o r another com pu ter) with the SSID y ou wish to connect is shown here. Scan result inc ludes 6 ty pes of informati on, they are: A The SSID (Servic e Set Identifier) o f w ire less device. If nothing i s displayed her e, it means the SSID of this wir el[...]

19 C The wir eless stan dar d supported b y this ac cess point is displaye d her e. ‘ n ’ for 8 02.1 1n , ‘ g; for 802.1 1g , and ‘ b ’ for 802.1 1b . WPS icon will appear whe n the access point supp orts W PS. If the access point uses encryption, a key ico n will appear . Note: When the access point s upports WPS and W PS icon is appear [...]

20 There are 4 ty pes of technical inform ation: General: Displays basi c inform ation about this a ccess poin t, such as SSID, MAC Addr ess, authentication / e ncryption type, channel etc. WPS: If this access point supports WPS (W i -Fi Pr otected Setup), r elated informa tion will be displayed her e. CCX: If this access point supports CCX (Cisco [...]

21 And here are descr i ptions of every setup item in setup are a: Item Name Description Sorted by >> Y ou can decide ho w to sort al l listed access point by „ SSID ‟ , „ Channe l ‟ , or „ Signal ‟ (signal strength). Show dBm Check this box to show the signal stren g th of access point, in stead of perce ntage. Rescan Click this [...]

22 2-2-1-2 Connect to an Access Point If the wireless ac cess point you wish to connect is found, you ca n establish connec t ion with it by cli cking „ Connect ‟ button. Instructions will be give n as follo w: 1. Click t he wireless acc ess point or n etwork devic e you wish t o connect, it will be hig h lighted, then c l ick „ Connect ‟ .[...]

23 3. If the w i reless access point uses encryption , you will be prompted t o input its WEP key or WP A preshared key .[...]

24 4. Plea se ask the own er of the wireless acce s s point you wan t to connect, and input the c orrect key here and then click „ OK ‟ . By checking „ Show Passwor d ‟ box, the encry ption key you inp utted here wi ll be displayed. If the value y ou inputted her e is wrong, you will not be a ble to conne ct to this wire less access point. [...]

25 Y ou can also cl ick More / Less button ( ) to see detailed information of con n ected acces s point: The current sta tus of w ireless connectio n will be dis played by Ral ink configuration utility icon: W ireless connection is est ab lished, good signal reception. W ireless connection is est ab lished, normal sig nal reception. W ireless conne[...]

26 2-2-1-3 Add an Access Point to Pr ofile If you will co nnect to som e specific wireless access p oint freque nt ly , you can add their inform a tion to the profile. Just like the te lephone di rectory , the profile sa v es all inform ation of access points, and y ou can recall them anytim e you wish to estab lish connectio n . Y ou can add a f o[...]

27 The setup util ity w ill expand: Here are descri ptions of e very setup item : Item Name Description Profile Nam e Y ou can give t his profile a nam e. Every profile needs a unique nam e. SSID Please input the SSID of this access point. I f you selected an acces s point from the list, and its SSID is not hidden, t he SSID will be filled automati[...]

28 decide the bes t output power for y ou. Preamble Select the pream ble for Ad hoc m od e here. A vailable o ptions are „ Aut o ‟ and „ L ong ‟ . It ‟ s suggested to selec t „ Auto ‟ to let setup utility decide the pream ble for you. Channel Y ou can selec t the radio channe l num ber for AdHoc m o de here. Power Save M ode Please se[...]

29 T o set authe ntication / encry pt ion inform ation fo r the access po int . Please click „ Auth. Encry . ‟ t ab : Here are descri ptions of e very setup item : Item Name Description Authenticatio n Select the au thentication ty p e of the wire less access point or wireless device y ou wish to connect. W hen you‟re ad ding a profile from[...]

30 profile from an existing access point or wireless device, the encryption ty pe will be selected a u tomatic ally , and please d o not modify it. WP A Preshared Key Input WP A preshared key here. If encry ption is not enabled, or you select „ WEP‟ as encryption ty pe, this field will be disabled and gray ed out. WEP Ke y Y ou can selec t key [...]

31 T o set 802.1 x authenticati on for the access p oint. Plea se click „ 802.1X ‟ tab: Here are descri ptions of e very setup item : Item Name Description EAP Method Select 802.1x E AP method fr o m dropdow n menu. Plea se ask the administrat or of the access poin t you wish to co nnect to select a correct EA P method. T unnel Authenticatio n [...]

32 If you need t o use protected authenticat ion credential, c h eck „ Use protected au t henticatio n credentia l ‟ bo x, and clic k „ Import ‟ to load .pac credential file ; to rem ove a loaded credential file, c l ick „ Remove ‟ . Session Resum ption Y ou can enable or disable session resum p tion here. If you don‟ t know if y o u [...]

33 After you com pl ete all inform ation related to the access p oint, click „ OK ‟ to save the profile, or click „ cancel ‟ to cancel adding a new profile. If the profile is crea t ed, y o u will see the inf ormation in t he Profile L ist.[...]

34 2-2-2 Using W indows Zero C onfiguration W in dows XP and V ista has a built-in wirel ess network c o nfiguration utility , called as „ W i ndows Zero Config u ration ‟ (W ZC). Y ou can also use WZC to configur e your wire less networ k param eter: 1. Righ t-click Ralink co nfiguration utility icon and select „ Use Z ero Configuration a s [...]

35 3. Click „ S tart ‟ button (should be located a t the bottom-left corner of windows des ktop), click „ Control Pa nel ‟ , then clic k „ Network and Internet Connect ions ‟ in C o ntrol Panel. 4. Click „ Network C onnections ‟ .[...]

36 5. Righ t-click „ W ireless Network Connec t ion ‟ (it m ay have a num ber as suf fix if you ha v e m ore than one wirele s s network car d , please make sure you righ t-click the „ Ralink 8 02.1 1n W ireless LAN Card), the n select „ V iew A vailable W irel ess Networks ‟ . 6. All wire l ess acce ss points in p roxim i ty will be disp[...]

37 7. If the acce ss point is protected by enc ryption, y ou have to input its security key or passphr ase here. It m ust match t he encryption setting on the access point. If the access p oint you selec t ed does not use encryption, you‟ ll not be prompted for sec urity key or p assphrase. 8. If y ou can see „ Connecte d ‟ m es sage, the con[...]

38 2-3 Profile Ma nagement If you need t o connect to dif ferent wireless access points at dif ferent time, like of acces s point of y ou r home, of fice, cybercafe, or public w ireless service, y ou can store the co n nection para meters (encryption, passphrase, security etc, etc.) a s a profile for every access point, so you don ‟ t have to inp[...]

39 2-3-1 Add a profile If you want to click new profile, click „ Profile ‟ menu, then click „ Add ‟ button. Y ou ‟ ll be pr om p ted to input detaile d inform at ion of access point, as described i n Section 2-2-1- 3.[...]

40 2-3-2 Edit an ex i sting profi le If you have adde d a profile bef ore, and you w i sh to change t he content of the profile, y ou can use this f u nction. Please select a profile from the list first, then clic k „ Edit ‟ button. Y ou ‟ ll be pr ovided with t he contents of selected profi le, and y ou can edit them. Click „ OK ‟ to sav[...]

41 2-3-3 Delete an e xisting profile If you no lon ger need a profile, y ou can delete it. Se lect the profile you wish to delete fr om the list, and click „ Delete ‟ button to delete it.[...]

42 2-3-4 Activate a profile When y ou want to connect to a specific w ireless device in the p rofile list, you can select it and click „ Activate ‟ button, to establish c o nnection w ith it. When y ou selected a profile a nd click „ Activate ‟ button to activate the profile, a icon will be display ed in front of the p rofile to show that t[...]

43 2-4 Advanced Setting s This wireless n etwork car d provides several advance d settings f or experienced w ireless users. Y ou ca n change these s ettings t o increase da ta transfer perform ance, or change operation mode. Please follow t he following instructions t o set adva n ced wirele ss settings: 1. Righ t-click the Ral ink configuration u[...]

44 Here are descri ptions of e very setup item : Item Name Description W irel ess mode Display the wireles s operation m ode of the network car d. Enable Tx Burst Check this box to acc elerate the da ta transm it rate. It may no t work with all w ireless access point and wireless device s . Enable TCP W in dow Size Check this box and the configurat[...]

45 Enable Radio Meas urements : When you‟re connecting to CCX-compatible access p oint, check this bo x to enable r adio m eas urement function to improve wireles s connectiv ity . Non-Serving Cha nnel Measurem ents Limit: When you‟re connec t ing to CCX -compatib le access point, check t his box to enable m easurement on unused radio cha nnels[...]

46 2-5 V i ew Network S tatistics The configurat i on utility provi des informat ion about netw ork statistic s and link sta tus. If you w an t to know how your wireles s network card works, y ou can use these f unctions to get d etailed information about the wireless connec t ion you ‟ re using. Please follow t he following instruction s to chec[...]

47 2-6 W MM Setting This wireless n etwork car d provides W MM ( Wi -Fi Multim ed ia) function, which can im prove the performance of cert ai n network a pplicat ions, like audio/video streaming, networ k telephony (V oIP), and othe rs. When you enable the WMM function of this networ k card, y o u can define the priority of dif ferent kinds of data[...]

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49 In „ W MM Setup S tatus ‟ bloc k , current WMM settings will b e display ed. And here are descr i ptions of every setup item : Item Name Description WMM E nable Check this box to enable WMM functio n. Please click „Apply‟ button o n the right of t his check box after you chec k or uncheck t his box, so corresponding se ttings in this w i[...]

50 2-7 W PS Configuration Wi - Fi Protected Setup (W PS) is the latest w i reless network tec hnology which m ak es wireless networ k setup be come very si mple. If you have WPS-enabled w i reless access p o int, and y ou want to esta blish a secure connection to it, you don ‟ t have to configure the wireless acces s point and setup data encry pt[...]

51 2-7-1 W PS Setup - PBC (Push-Button C onfiguration) 1. Righ t-click the Ral ink configurat ion utility icon l ocated at low er-right corner of com p uter desktop and then clic k „ L aunch Config Utility ‟ . 2. Click „ WPS ‟ menu, and the following set tings will appea r . 3. Set „ Config Mode ‟ to „ Enrollee ‟ , and then push the[...]

52 4. Before y ou start to establish the wir el ess con nection by using WPS, you can click „ Resca n ‟ button t o search fo r WPS-enabled acces s points near you aga in, to m ake sure the WPS function of y o ur access point i s activated. All access po ints with WPS function enabled w i ll be display ed here . Please m ak e sure the access poi[...]

53 access point. If y ou wish to save this connection as a pr o file, you can click „ Export Pro file ‟ butto n, and this co n nection will be saved. Y ou can find this c onnection in „ Profile ‟ tab in a later tim e. 7. Som etime W PS may fail (In the fo l lowing picture, WPS pairing is failed because no W PS -enabled access p oint is fo u[...]

54 2-7-2 W PS Setup - PIN If the wireless ac cess point y ou wish to connect supp o rts PIN, please follow the followi ng instructi ons to establis h connectio n to it: 1. Righ t-click the Ral ink configurat ion utility icon l ocated at low er-right corner of com p uter desktop and t h en click „ Launch Co nfig Utility ‟ . 2. Click „ WPS Conf[...]

55 4. Click „ PIN ‟ but ton now , and wait for few seconds to on e m inute. If a wireless acces s point with correc t PIN code is f ound, you ‟ ll be connected to that acc es s point. 5. Y ou may have to click „ PIN ‟ for few more times to try again. If you still can not co nnect to acce ss point by this way , please make sure the PIN cod[...]

56 2-8 Radio On/Of f Y ou can switc h the wire less radio transce iver on an d of f by the utili ty , so if you want t o disable w ireless network f u nction, y ou don ‟ t h ave to remove the ne twork card physically . 1. Righ t-click the Ral ink configurat ion utility icon l ocated at low er-right corner of com p uter desktop and t h en click ?[...]

57 2-9 About The „ About ‟ tab provides you the i n form ation about version number of the configura tion utility , driver , and other important inform ation about your wireless netw ork card. Please follow t he following instructions t o see these i nform ation: 1. Righ t-click the Ral ink configurat ion utility icon l ocated at low er-right c[...]

58 2-10 On-line Hel p If you need t o know the dire ctions of how to use spec i fic functio n in the utility , please click „ Help ‟ button. On-line help docum ent s will be presented in W indows hel p format. Click this button to view on -line help d ocuments.[...]

59 CHAPTER I II : Soft-AP Functi on Excepting bec ome a wireles s client of ot her wireless acc ess points, this wireless card ca n act as a wirele ss service p rovider also! Y ou can swit ch this wireless car d ‟ s operating mode to „ AP ‟ mode to sim ul ate the function of a real wirele ss access p oint by softwar e, and all other com puter[...]

60 A configuration wind ow will appear after you switch the operation m ode to „ AP ‟ , which asks you to assig n an existing ne t work card with internet connection. If your com p uter has an other networ k card w hich is connecte d to Internet, please selec t it from „ Nam e ‟ dropdown m e nu, and clic k „ Enable ICS ‟ ; if your com p[...]

61 Here are descri ptions of e very setup item: Item Name Description SSID Please input the SSID (th e nam e us ed to identify this wireless acc ess point) here. Up to 32 numerical cha racters can be acce pted here, excepting s pace. Channel Please select t he wireless c h annel y ou wish to use. The num b er of channels ava ilable here wil l vary [...]

62 Country Region Code Please select t he country code of the countr y or region you liv e. A vailable option s are 0-7, which will af fect the available wirele ss channels you c an use: 0: FCC (US, Cana d a, and other countries u ses FCC radio comm unication standards) 1: ETSI (Euro pe) 2: SP AIN 3: FRANCE 4: MKK 5: MKKI (TEL EC) 6: ISERAL (Cha nn[...]

63 Please select a p roper outpu t power setti ng according to y our actual need s . Y ou may no t need 100% of output po wer if other w ireless cl ients are not far from you. Idle T ime Select the idle tim e for the wireless acce ss point . Default value is 300. D o not modify this value unless you know what will b e af fected. T o save cha n ges,[...]

64 3-2 Security Sett ing This wireless car d supports wi reless encry ption in AP mode, which will encrypt the da t a being tran sferred over t he air to enhance data security level. It ‟ s recomm end ed to enable da t a encry pt ion unless y o u wish to open your com puter (and its internet co nnection) to t h e public. When y ou click „ Secur[...]

65 Here are descri ptions of e very setup item: Item Name Description Authenticatio n T y pe Please select a w ireless a uthentication type you wish to use. A vai lable options are „ Open‟, „Shared‟, WP A- PSK‟, „WP A2 - PSK‟, and „WP A -PSK / WP A 2- PSK‟. If y ou want to disable wireless data e nc ryption, y ou must select „ O[...]

66 characters if y ou select ASCII. 1 28 bits en cryption is safer then 64 bits, but the dat a transfer s peed will be sligh tly reduced. Show Passwor d Check this box and the WP A pre -shared key or WEP ke y you inputte d will be show n, but not replaced by asteri s k (*). When you finish with setting and want to save changes, c lick „ OK ‟ bu[...]

67 3-3 Access Control If you ‟ re not g oing to open y o ur com puter and wireless re s ources t o the public, you ca n use MAC ad dress filtering fu nction to enfor ce y o ur access control policy , so only wireless clients wi th MAC addre ss you defined by th is function can b e connecte d to your softwa re access point.[...]

68 Here are descri ptions of e very setup item : Item Name Description Access Policy Select the pol i cy type of your acce ss rule. Disable: Allow any w i reless clien t with proper authentication settings to connect to t his access point. Allow All: Only allow w i reless clients w ith MAC address listed here to connect to thi s access point. Rejec[...]

69 3-4 Connection T able If you want to s ee the list of all w i reless cli en ts connecte d to this access point, please select „ Mac T able ‟ tab from the utility .[...]

70 Here are descri ptions of e very field: Item Name Description MAC Address Displays the MA C addre ss of this wirele ss c l ient. AID The serial num ber of this wireless c onnection. Power Saving Mode Displays the ca p ability of powe r-sa v ing function of this wir eless client. S tatus Displays add itional inform ation of this wireless Connecti[...]

71 3-5 Event Log This software acce ss point will log all w ireless -related ac t ivities as a lo g . Click „ Event Lo g ‟ tab, and the ev ent log w ill be disp layed. Y ou can clic k „ Clear ‟ to rem ove all entries in the log.[...]

72 3-6 S t atisti cs If you want to know detai l ed information about h ow your softw are access point works, clic k „ S t atistics ‟ tab, a n d the eve nt log will be d isplay ed . Y ou can clic k „ RESET COUNTERS ‟ button to re set all cou nters to zero.[...]

73 3-7 About The „ About ‟ ta b provides y ou the inform atio n about vers ion num ber of the configurati on utility , driver , and other im portant information abou t your wireless acce ss point.[...]

74 CHAPTER IV : Appendix 4-1 Specifica tion Standards: IEEE 802.11b/g/n (1T1R) Interface: 32Bit P CI Frequency Band: 2.4000 ~ 2.4835GHz (Industrial Scientific Medical Band) Data Rate: 11b: 1/2/5.5/11Mbps 11g: 6/9/12/24/36/48/54Mbps 11n (20MHz): MCS0-7 (up to 72Mbps) 11n (40MHz): MCS0-7 (up to 150Mbps) Securities: W EP 64/12 8-bit, WPA, W PA2 Cisco [...]

75 4-2 T roubleshooting If you encoun ter any problem when you ‟ re using th is wireless networ k card, don ‟ t panic! Before you ca ll your deal er of purchase f o r help, please check this tro ubleshooting table, the soluti o n of y our problem could be very sim p le, and you can so lve the proble m by yourself! Scenario Solution I can ‟ t [...]

76 for correct SSID. 3. Y ou have to input correct pas sphrase / security key to connect an access point with encry ption. Please con tact the owner of access p oint to ask f or correct passphrase / securi t y key . 4. The acce s s point y o u wish to con n ect only allows ne twork cards wi t h specific MAC address to establish c onnection. Please [...]

77 4-3 Glossary 1. What i s the IEEE 8 02.1 1g standard? 802.1 1g is the n ew IEE E st andard for h igh -speed wireles s LAN comm u nications that provides f or up to 54 Mbps data rate i n the 2.4 GHz band. 802. 1 1g is quic kly becomin g the next m ain stream wireless LAN technology for the h o me, office a nd public netwo rks. 802.1 1g define s t[...]

78 5. What i s Infrastruct ure? An integrated w ireless and w ireless an d wired LAN is ca l led an Infrastructure c onfiguration. Inf rastructure is applicable t o enterprise scale for wire less access to central data b ase, or wire l ess applica tion for mobile worker s . 6. What i s BSS ID? A specific A d hoc LA N is called a Ba sic Service Se t[...]

79 12. What is DSSS? What is FHSS? And what ar e their d ifferen ces? Frequency-hoppi n g spread-spectrum (FHSS) uses a narrowband carrier that chan ges frequency in a pattern that is known to bo th transmitter an d receiver . Properly synchronized, the net ef fect is to maintain a sing l e logical cha nnel. T o an u nintended rece iver , FHSS appe[...]

80 15. What is WMM Power S ave? WMM Power Save i s a set of fea tures for W i-Fi networks that increase the ef ficiency and f lexibility of data transm i ssion in order to conserve pow er . WMM Power Save has been optim i zed for m obile devices running late ncy-sensitive ap plications s uch as voice, audio, or video, but ca n benefit any W i-Fi de[...]

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