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4 Troubleshooting 

 

This chapter provides solutions to problems usually encountered during the installation and operation 

of the adapter.   

 

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 MIMO?   

MIMO (multiple-input multiple-output)

, a

 technique for boosting wireless bandwidth and range 

by taking advantage of multiplexing. MIMO algorithms in a radio chipset send information out 
over two or more antennas. The radio signals reflect off objects, creating multiple paths that in 
conventional radios cause interference and fading. But MIMO uses these paths to carry more 
information, which is recombined on the receiving side by the MIMO algorithms 
Many wireless-LAN vendors expect that some form of MIMO will be the basis of work just starting 
in the IEEE 802.11n Task Group, which is creating a specification for WLANs having at least 
100M bit/sec throughput. MIMO doubles the spectral efficiency compared with that of current 
WLANs. 

 

3.  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. 

 

4.  What does IEEE 802.11 feature support

 

The product supports the following IEEE 802.11 functions: 

z

 

CSMA/CA plus Acknowledge Protocol 

z

 

Multi-Channel Roaming 

z

 

Automatic Rate Selection 

z

 

RTS/CTS Feature 

z

 

Fragmentation 

z

 

Power Management 

28

 

Содержание WML-3565

Страница 1: ...802 11g Wireless MIMO PCMCIA Adapter WML 3565 User s Manual...

Страница 2: ...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 separati...

Страница 3: ...Iceland Liechtenstein Norway and Switzerland WEEE regulation To avoid the potential effects on the environment and human health as a result of the presence of hazardous substances in electrical and el...

Страница 4: ...lation 6 3 CONFIGURATION UTILITY 8 3 1 Site Survey 9 3 2 Profile 10 3 2 1 Configure the Profile 11 3 2 1 1 Configuration 11 3 2 1 2 Authentication and Security 13 3 2 1 3 802 1x Setting Certification...

Страница 5: ...ed secret key Furthermore this card supports WPA2 function WPA2 provides a stronger encryption mechanism through AES Advanced Encryption Standard which is a requirement for some corporate and governme...

Страница 6: ...mental Mechanical Characteristics Temperature Operating 0 C 55 C Storage 20 C 70 C Operating Humidity Operating 10 to 90 Non Condensing Storage 5 to 95 Non Condensing Dimensions 114 x 54 x 5 mm L x W...

Страница 7: ...3565 into your PC 2 1 Configuration Utility Installation 1 Insert the bundled CD into the CD ROM drive to launch the autorun program Once completed a menu screen will appear 2 Click the Configuration...

Страница 8: ...URST option will be enabled to increase the transfer speed However the AP must support this feature as well If the target AP is complying with 802 11b g standard please select Optimize for WiFi mode 6...

Страница 9: ...7 Please click Finish to complete the installation 5...

Страница 10: ...required Just click Yes to proceed 1 After the PC restart Please insert WML 3565 into a vacant PCMCIA slot 2 The system will automatically detect the card and display Found New Hardware Wizard screen...

Страница 11: ...7...

Страница 12: ...n Utility appears as an icon on the system tray of Windows while the card is running You can open the utility by double click on the icon Right click the icon there are some items for you to operate t...

Страница 13: ...t Parameter Description Available Networks This list shows all available wireless networks within range of your card It also displays the information of the networks including the SSID BSSID Signal St...

Страница 14: ...the relative settings of the profiles including Profile Name SSID Channel etc This sign indicates the activated profile is been connecting This sign indicates the activated profile is not been connec...

Страница 15: ...may specify a SSID for the WML 3565 and then only the device with the same SSID can interconnect to the card If you want to add the network nearby to the profile list pull down the menu all the netwo...

Страница 16: ...is recommended to setting the card to this mode This mode is also the default setting 802 11 G only This card can be compatible with both 802 11g and 802 11b wireless stations If there are only 802 1...

Страница 17: ...etworks that the card intends to connect Open No authentication is needed among the wireless network Shared Only wireless devices using a shared key WEP Key identified are allowed to connecting each o...

Страница 18: ...between authorized devices WPA2 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...

Страница 19: ...3456aef or test1 128 bit Input 26 digit Hex values in the A F a f and 0 9 range or 13 digit ASCII characters including a z and 0 9 as the encryption keys For example 01234567890123456789abcdef or admi...

Страница 20: ...authentication protocols this card has supported are included as follows This setting has to be consistent with the wireless APs or Routers that the card intends to connect PEAP TTLS PEAP and TTLS are...

Страница 21: ...the password as the identity for the server Use Client Certificate A client certificate is required for TLS and is optional for TTLS and PEAP This forces a client certificate to be selected from the a...

Страница 22: ...s an issuer as a trusted root authority by placing the issuer s self signed certificate which contains the issuer s public key into the trusted root certification authority certificate store of the ho...

Страница 23: ...e network the card is connecting to Extra Info Display the link status Channel Display the number of the radio channel and the frequency used for the networking Link Speed Mbps Display the transmissio...

Страница 24: ...ignal been received by the card This indicator helps to find the proper position of the wireless device for quality network operation Noise Level Display the noise level in the wireless environment 3...

Страница 25: ...n the network you can set the card to this mode 802 11 G only This card can be compatible with both 802 11g and 802 11b wireless stations If there are only 802 11g wireless stations in the network you...

Страница 26: ...you can select Tx BURST Tx Burst enables the card to deliver the better throughput in the same period and environment This feature only takes effect when the connected AP also supports Tx Burst Enabl...

Страница 27: ...takes the place of the RADIUS server and authenticates the client so quickly that there is no perceptible delay in voice or other time sensitive applications Enable Radio Measurement When this parame...

Страница 28: ...ion you can click the hyperlink to connect the PLANET website You can also obtain basic information about the WML 3565 such as the Driver Utility and EEPROM Version The MAC Address of the card is disp...

Страница 29: ...802 11e extensions for 802 11 networks will help to define the priorities of the data traffics by the data categories to provide enhanced multimedia support When the WML 3565 is connected to the AP or...

Страница 30: ...C Click Configure D Select Advanced page enable the WMM Capable 26...

Страница 31: ...on when B mode station and G mode station exist concurrently CAM when AC power When use AC power it doesn t enter into sleep mode Country Region 11A Not applicable on WML 3565 Country Region 11G Suppo...

Страница 32: ...ection mechanism called RTS CTS that governs how 802 11g devices and 802 11b devices interoperate 2 What is MIMO MIMO multiple input multiple output a technique for boosting wireless bandwidth and ran...

Страница 33: ...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 sta...

Страница 34: ...eivers 14 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 d...

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