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5. Wireless Network Glossary

31

X.USB

User’s Manual

WLAN (Wireless Local Area Network)

A type of local-area network that uses high-frequency radio waves rather than wires
to communicate between nodes. The most popular standard for WLAN is the 802.11
standards.

WMM (Wi-Fi Multimedia)

WMM is a standard to prioritize traffic for multimedia applications. The WMM
prioritize traffic\ on Voice-over-IP (VoIP), audio, video, and streaming media as well
as traditional IP data over the AP.

WMS (Wireless Management System)

An utility program to manage multiple wireless AP/Bridges.

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Содержание X.USB

Страница 1: ...Table of Contents X USB User s Manual 11 a b g n 300Mbps Dual Band USB Ada X USB pter User s Manual ...

Страница 2: ...tocopying or recording without the written consent of OvisLink Corp OvisLink Corp has made the best effort to ensure the accuracy of the information in this user s guide However we are not liable for the inaccuracies or errors in this guide Please use with caution All information is subject to change without notice All Trademarks are properties of their respective holders ...

Страница 3: ...urning 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 ...

Страница 4: ...ecommunications 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...

Страница 5: ...1 1 1 Feature Summary 2 1 2 System Requirements 2 1 3 Package Contents 3 1 4 Hardware Installation 3 1 5 LED Table 4 2 Software Installation Windows 5 2 1 Windows Configuration Mode Setting 9 3 Specifications 12 4 Frequent Asked Questions 13 5 Wireless Network Glossary 14 ...

Страница 6: ...adapter lets you connect your desktop computer or notebook computer to wireless networks with the link speed of up to 300Mbps In addition X USB embedded with two RP SMA connectors that allows user to change antennas with their preferable type You will soon be able to enjoy this long distance and wide range wireless adapter by following the instruction in this manual ...

Страница 7: ...e 2 x R SMA Antenna Connectors Portable Pen Size Windows drivers Atheros UB82 Chipset Model X USB No Antenna Included Model X USB 3 2 x 3dBi Antennas Included 1 2 System Requirements y USB 2 0 port CD ROM drive y Windows 32 64 bit XP 2000 Vista 7 y At least 100MB of available disk space Note this device may not be able to work with USB 1 1 port ...

Страница 8: ...for missing items y X USB y Quick Setup Guide y Software CD y 3dBi Antenna 2 Model X USB 3 only Model X USB does not include any antennas 1 4 Hardware Installation y Screw in the antennas to the R SMA Antenna Connectors y Go to Chapter2 and follow the instruction to install the driver for X USB y Wait for the instruction on the screen to insert the X USB into the USB port of your computer ...

Страница 9: ...1 Introduction X USB User s Manual 4 1 5 LED Table LED Mode Status Flash per second Active Site Survey Flash twice per second Transferring data Link Activity Off Adapter disabled ...

Страница 10: ...s Manual 2 2 Software Installation Windows 1 Insert the enclosed software CD in the CD ROM drive and click Install Driver Utility from the autorun screen If the autorun screen did not appear run the X USB exe setup program under the Driver folder ...

Страница 11: ...ser s Manual 6 2 When the first of the AirLive X USB Installer screen displays click Next to begin the installation 3 When the below pop up screen displays follow the on screen instruction and insert X USB into USB port Click OK to continue ...

Страница 12: ...User s Manual 4 Please wait while the install procedure is running When you see this message click Finish to complete the driver installation process It is recommended to restart your computer once the driver utility installation is complete ...

Страница 13: ...8 5 After the system reboot signal icon appears in the desktop menu presenting the status of the wireless adapter Click on the icon to see the available wireless networks To begin configuring the wireless connection select Open Network and Sharing Center ...

Страница 14: ... 11a frequency After the driver installation X USB will detect 2 4GHz and 5GHz signal frequency automatically However if you would like to connect or site survey specific signal frequency please refer to the below steps to adjust the adapter settings Example1 Put USB to connect only with 2 4GHz network 1 Go to X USB Wireless Network Connection and click on Configure ...

Страница 15: ...ndows X USB User s Manual 10 2 When below screen appears click on Advanced tap and select Wireless Mode 2 4GHz then pull down the selection bar the arrow sign under the Value and select your preferable mode for 2 4GHz frequency ...

Страница 16: ...ndows 11 X USB User s Manual Example2 Put USB to connect only with 5GHz network Click on Advanced tap and select Wireless Mode 5GHz then click on the arrow sign under the Value and select your preferable mode for 5GHz frequency ...

Страница 17: ...MHz up to 300Mbps Wireless LAN General Interface USB 2 0 Chipset Atheros UB82 Frequency band 2 4000 2 4835 GHz and 4 9 5 925 GHz Modulation technologies OFDM with BPSK QPSK 16 QAM 64 QAM DBPSK DQPSK CCK Hardware Encryption WEP AES TKIP Certification CE LEDs Link Activity Green Environmental Dimensions 12 H x 28 34 W x 97 98 L mm Weight 210g without antennas Operating temperature 0 40 C 32 104 F Op...

Страница 18: ...possible solution Question Is there a Linux driver for X USB Answer X USB may work with Linux drivers that support UB82 chipset Please go to our website www airlive com then click on the Support menu Type X USB in the search and go to the driver download page You may find the Linux driver there However AirLive does not provide support or Installation procedure for the Linux driver ...

Страница 19: ...e 802 11a have 12 non overlapping channels comparing to 802 11b g s 3 non overlapping channels This means the possibility to build larger non interfering networks However the 802 11a deliver shorter distance at the same output power when comparing to 802 11g 802 11b International standard for wireless networking that operates in the 2 4GHz frequency band 2 4 GHz to 2 4835 GHz and provides a throug...

Страница 20: ...recent amendment which improves upon the previous 802 11 standards by adding multiple input multiple output MIMO and many other newer features The IEEE has approved the amendment and it was published in October 2009 Enterprises however have already begun migrating to 802 11n networks based on the Wi Fi Alliance s certification of products conforming to a 2007 draft of the 802 11n proposal 802 11n ...

Страница 21: ...es they can only view in frames of 256 ID at a time 802 1x 802 1x is a security standard for wired and wireless LANs In the 802 1x parlance there are usually supplicants client authenticator switch or AP and authentication server radius server in the network When a supplicants request a service the authenticator will pass the request and wait for the authentication server to grant access and regis...

Страница 22: ...o waiting for the ACK Window to timeout on lost packets If the ACK setting is too low then the ACK window will have expired and the returning packet will be dropped greatly lowering throughput By having the ability to adjust the ACK setting we can effectively optimize the throughput over long distance links This is especially true for 802 11a and 802 11g networks Setting the correct ACK timeout va...

Страница 23: ...e cable loss Cable loss should be subtracted from the total output power during distance calculation For example if the cable and connector loss is 3dBm and the output power is 20dBm the output power at the cable end is only 17dBm Client Client means a network device or utility that receives service from host or server A client device means end user device such as wireless cards or wireless CPE CP...

Страница 24: ...y assign IP addresses When DHCP is used whenever a computer logs onto the network it automatically gets an IP address assigned to it by DHCP server A DHCP server can either be a designated PC on the network or another network device such as a router DMZ Demilitarized Zone When a router opens a DMZ port to an internal network device it opens all the TCP UDP service ports to this particular device T...

Страница 25: ...tifier to distinguish one network from the other Wireless clients must know the SSID in order to associate with a WLAN network Hide SSID feature disable SSID broadcast so users must know the correct SSID in order to join a wireless network Firewall A system that secures a network and prevents access by unauthorized users Firewalls can be software router or gateway Firewalls can prevent unrestricte...

Страница 26: ...ffice environment gateway typically is a multi function device that integrates NAT firewall bandwidth management and other security functions Hotspot A place where you can access Wi Fi service The term hotspot has two meanings in wireless deployment One is the wireless infrastructure deployment the other is the Internet access billing system In a hotspot system a service provider typically need an...

Страница 27: ... to support secure exchange of packets at the IP layer IPsec has been deployed widely to implement Virtual Private Networks VPNs IPsec supports two encryption modes Transport and Tunnel Transport mode encrypts only the data of each packet but leaves the header untouched The more secure Tunnel mode encrypts both the header and the payload On the receiving side an IPSec compliant device decrypts eac...

Страница 28: ... increase the coverage and performance of a WLAN network In a MIMO device 2 or more antennas are used to increase the receiver sensitivity and to focus available power at intended Rx NAT Network Address Translation A network algorithm used by Routers to enables several PCs to share single IP address provided by the ISP The IP that a router gets from the ISP side is called Real IP the IP assigned t...

Страница 29: ...ter or networking device used for plugging in a cable or an adapter The virtual connection point through which a computer uses a specific application on a server PPPoE Point to Point Protocol over Ethernet PPPoE relies on two widely accepted standards PPP and Ethernet PPPoE is a specification for connecting the users on an Ethernet to the Internet through a common broadband medium such as a single...

Страница 30: ...n to the ISP you must enter your username and password This information is passed to a RADIUS server which checks that the information is correct and then authorizes access to the ISP system Radius typically uses port 1812 and port 1813 for authentication and accounting port Though not an official standard the RADIUS specification is maintained by a working group of the IETF Receiver Sensitivity R...

Страница 31: ...packet sent when a computer has data to transmit The computer will wait for a CTS Clear To Send message before sending data RTS Threshold RTS Request to Send The RTS CTS clear to send packet will be send before a frame if the packet frame is larger than this value Lower this value can improve the performance if there are many clients in your network You can try 1500 1000 or 500 when there are many...

Страница 32: ...also known as Web VPN The HTTPS and SSH management interface use SSL for data encryption Subnet Mask An address code mask that determines the size of the network An IP subnet are determined by performing a BIT wise AND operation between the IP address and the subnet mask By changing the subnet mask you can change the scope and size of a network Subnetwork or Subnet Found in larger networks these s...

Страница 33: ...bo In Dynamic Turbo the channel binding will be used only if necessary In Static Turbo the channel binding is always on This protocol may be combined with Super A model to increase the performance even more The used of channel binding might be prohibited in EU countries TX Output Power Transmit Output Power The TX output power means the transmission output power of the radio Normally the TX output...

Страница 34: ...e Internet a walled garden refers to a browsing environment that controls the information and Web sites the user is able to access This is a popular method used by ISPs in order to keep the user navigating only specific areas of the Web WAN Wide Area Network A communication system of connecting PCs and other computing devices across a large local regional national or international geographic area ...

Страница 35: ...ody for Wi Fi is called Wi Fi Alliance also known as WECA WiMAX Worldwide Interoperability for Microwave Access A Wireless Metropolitan Network technology that complies with IEEE 802 16 and ETSI Hiperman standards The orginal 802 16 standard call for operating frequency of 10 to 66Ghz spectrum The 802 16a amendment extends the original standard into spectrum between 2 and 11 Ghz 802 16d increase d...

Страница 36: ...cate between nodes The most popular standard for WLAN is the 802 11 standards WMM Wi Fi Multimedia WMM is a standard to prioritize traffic for multimedia applications The WMM prioritize traffic on Voice over IP VoIP audio video and streaming media as well as traditional IP data over the AP WMS Wireless Management System An utility program to manage multiple wireless AP Bridges ...

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