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 Appendix D Wireless LANs

ZyXEL G-570S User’s Guide

141

Positioning the antennas properly increases the range and coverage area of a wireless LAN. 

Antenna Characteristics

Frequency

An antenna in the frequency of 2.4GHz (IEEE 802.11b) or 5GHz(IEEE 802.11a) is needed to 
communicate efficiently in a wireless LAN. 

Radiation Pattern

A radiation pattern is a diagram that allows you to visualize the shape of the antenna’s 
coverage area. 

Antenna Gain

Antenna gain, measured in dB (decibel), is the increase in coverage within the RF beam width. 
Higher antenna gain improves the range of the signal for better communications. 

For an indoor site, each 1 dB increase in antenna gain results in a range increase of 
approximately 2.5%. For an unobstructed outdoor site, each 1dB increase in gain results in a 
range increase of approximately 5%. Actual results may vary depending on the network 
environment. 

Antenna gain is sometimes specified in dBi, which is how much the antenna increases the 
signal power compared to using an isotropic antenna. An isotropic antenna is a theoretical 
perfect antenna that sends out radio signals equally well in all directions. dBi represents the 
true gain that the antenna provides.   

Types of Antennas for WLAN

There are two types of antennas used for wireless LAN applications.

• Omni-directional antennas send the RF signal out in all directions on a horizontal plane. 

The coverage area is torus-shaped (like a donut) which makes these antennas ideal for a 
room environment. With a wide coverage area, it is possible to make circular overlapping 
coverage areas with multiple access points. 

• Directional antennas concentrate the RF signal in a beam, like a flashlight does with the 

light from its bulb. The angle of the beam determines the width of the coverage pattern. 
Angles typically range from 20 degrees (very directional) to 120 degrees (less directional). 
Directional antennas are ideal for hallways and outdoor point-to-point applications.

Positioning Antennas

In general, antennas should be mounted as high as practically possible and free of 
obstructions. In point-to–point application, position both antennas at the same height and in a 
direct line of sight to each other to attain the best performance. 

Содержание G-570S

Страница 1: ...www zyxel com G 570S 802 11g Wireless Access Point User s Guide Version 1 00 12 2006 Edition 2...

Страница 2: ......

Страница 3: ...creens and supplementary information Command Reference Guide The Command Reference Guide explains how to use the Command Line Interface CLI and CLI commands to configure the ZyXEL Device It is recomme...

Страница 4: ...field choices are all in bold font A key stroke is denoted by square brackets and uppercase text for example ENTER means the enter or return key on your keyboard Enter means for you to type one or mo...

Страница 5: ...e 5 Icons Used in Figures Figures in this User s Guide may use the following generic icons The ZyXEL Device icon is not an exact representation of your device ZyXEL Device Computer Notebook computer S...

Страница 6: ...vice before servicing or disassembling Use ONLY an appropriate power adaptor or cord for your device Connect it to the right supply voltage for example 110V AC in North America or 230V AC in Europe Do...

Страница 7: ...Safety Warnings ZyXEL G 570S User s Guide 7...

Страница 8: ...Safety Warnings ZyXEL G 570S User s Guide 8...

Страница 9: ...s 21 Introducing the ZyXEL Device 23 30 Introducing the Web Configurator 31 Wizards 35 Advanced 43 Navigating the Advanced Screens 45 Status Screens 47 System Screen 51 Wireless Screens 55 Management...

Страница 10: ...Contents Overview ZyXEL G 570S User s Guide 10...

Страница 11: ...Point for Internet Access 23 1 2 2 Corporate Network Access Application 24 1 2 3 Wireless Client Application 24 1 2 4 Bridge Repeater 25 1 2 5 Access Point and Repeater 26 1 3 Ways to Manage the ZyXEL...

Страница 12: ...atus Screens 47 5 1 System Status 47 5 1 1 Statistics 48 5 1 2 Association List 49 Chapter 6 System Screen 51 6 1 TCP IP Parameters 51 6 1 1 IP Address Assignment 51 6 1 2 IP Address and Subnet Mask 5...

Страница 13: ...ess Security WPA 2 75 7 7 5 Wireless Security IEEE 802 1x 77 7 8 MAC Filter 78 7 9 OTIST 81 7 9 1 Enabling OTIST 81 7 9 2 Starting OTIST 83 7 9 3 Notes on OTIST 84 Part III Management and Troubleshoot...

Страница 14: ...dix A Product Specifications 101 Appendix B Setting up Your Computer s IP Address 107 Appendix C Pop up Windows JavaScripts and Java Permissions 123 Appendix D Wireless LANs 129 Appendix E Customer Su...

Страница 15: ...ure 18 Wizard 3 WPA 2 PSK 40 Figure 19 Wizard Confirm Your Settings 41 Figure 20 Status Screen 45 Figure 21 Status 47 Figure 22 Status View Statistics 49 Figure 23 Status View Association List 50 Figu...

Страница 16: ...CP IP Properties IP Address 109 Figure 62 Windows 95 98 Me TCP IP Properties DNS Configuration 110 Figure 63 Windows XP Start Menu 111 Figure 64 Windows XP Control Panel 111 Figure 65 Windows XP Contr...

Страница 17: ...Pop up Blocker Settings 125 Figure 87 Internet Options Security 126 Figure 88 Security Settings Java Scripting 127 Figure 89 Security Settings Java 127 Figure 90 Java Sun 128 Figure 91 Peer to Peer Co...

Страница 18: ...List of Figures ZyXEL G 570S User s Guide 18...

Страница 19: ...reless the AP Survey Screen 65 Table 17 Wireless Settings Bridge 68 Table 18 Wireless Settings AP Repeater 70 Table 19 Wireless Security Disable 73 Table 20 Wireless Security WEP 74 Table 21 Wireless...

Страница 20: ...List of Tables ZyXEL G 570S User s Guide 20...

Страница 21: ...21 PART I Introduction and Wizards Introducing the ZyXEL Device 23 Introducing the Web Configurator 31 Wizards 35...

Страница 22: ...22...

Страница 23: ...work as a bridge and repeater to extend your wireless network You can also use it as a wireless client to access a wired network through another AP The ZyXEL Device uses IEEE 802 1x WEP data encryptio...

Страница 24: ...s A B and C can access the wired network through the ZyXEL Devices The following figure depicts a typical application of the ZyXEL Device in an enterprise environment The three computers with wireless...

Страница 25: ...ng example are using bridge mode with a star configuration A B C and D are connected to independent wired networks and have bridge connections at the same time B C and D can communicate with A Figure...

Страница 26: ...as an AP for wireless clients C and D B also repeats traffic between the wireless clients and AP A which is connected to the wired network You could also set AP A to AP Repeater mode so that wireless...

Страница 27: ...have to totally re configure the ZyXEL Device You could simply restore your last configuration 1 5 LEDs Figure 7 LEDs The following table describes the LEDs on the ZyXEL Device Table 1 Front Panel LE...

Страница 28: ...s See the appendix for details on how to set up your IP address The following figure shows an example of accessing your ZyXEL Device via a wired connection with an Ethernet cable Figure 8 Wired Connec...

Страница 29: ...ss the ZyXEL Device you will need to reload the factory default using the RESET button Resetting the ZyXEL Device replaces the current configuration file with the factory default configuration file Th...

Страница 30: ...Chapter 1 ZyXEL G 570S User s Guide 30...

Страница 31: ...by default in Windows XP SP Service Pack 2 JavaScripts enabled by default Java permissions enabled by default See the Troubleshooting chapter for details on how to make sure these functions are allowe...

Страница 32: ...11 Login Screen 6 Select your language and click Apply Figure 12 Language Screen 7 The following screen displays Select Go Wizard Setup and click Apply to use the wizard setup screens for initial con...

Страница 33: ...Chapter 2 Introducing the Web Configurator ZyXEL G 570S User s Guide 33 Figure 13 Select Wizard or Advanced Setup Screen...

Страница 34: ...Chapter 2 Introducing the Web Configurator ZyXEL G 570S User s Guide 34...

Страница 35: ...to the System Screens chapter for more background information 1 Enter a descriptive name to identify the device in the Ethernet network 2 Select Obtain IP Address Automatically if you want to put the...

Страница 36: ...ble characters Spaces are allowed If you change this field on the device make sure all wireless stations use the same SSID in order to access the network 2 A wireless device uses a channel to communic...

Страница 37: ...r select WPA PSK if your wireless clients support WPA PSK Select WPA2 PSK if your wireless clients support WPA2 PSK Go to Wireless Security if you want WPA2 WPA or 802 1x See Chapter 7 on page 55 for...

Страница 38: ...ns to set up the WEP keys 2 Choose an encryption level from the drop down list The higher the WEP encryption the higher the security but the slower the throughput 3 You can generate or manually enter...

Страница 39: ...WPA 2 PSK Only select WPA PSK or WPA2 PSK if your wireless clients support it Type a pre shared key from 8 to 63 ASCII characters including spaces and symbols This field is case sensitive Use Passphr...

Страница 40: ...rd 3 WPA 2 PSK 3 1 4 Wizard Confirm Your Settings This read only screen shows the status of the current settings Use the summary table to check whether what you have configured is correct Click Finish...

Страница 41: ...Chapter 3 Wizards ZyXEL G 570S User s Guide 41 Figure 19 Wizard Confirm Your Settings For more detailed background information see the rest of this User s Guide...

Страница 42: ...Chapter 3 Wizards ZyXEL G 570S User s Guide 42...

Страница 43: ...43 PART II Advanced Navigating the Advanced Screens 45 Status Screens 47 System Screen 51 Wireless Screens 55...

Страница 44: ...44...

Страница 45: ...47 for details about the individual screen Figure 20 Status Screen The following table describes the global web configurator icons in the upper right corner of most screens Table 3 Global Icon Key IC...

Страница 46: ...ss Settings Use this screen to configure the wireless LAN Security Use this screen to configure the wireless LAN s security settings MAC Filter Use the MAC filter screen to configure the ZyXEL Device...

Страница 47: ...21 Status The following table describes the labels in this screen Table 5 Status LABEL DESCRIPTION Refresh Interval Use the drop down list box to select how often you want the device to renew the inf...

Страница 48: ...bnet Mask This is the Ethernet port subnet mask Gateway IP Address This is the IP address of a gateway Leave this field as 0 0 0 0 if you do not know it Wireless Settings SSID This is the descriptive...

Страница 49: ...Ethernet port Wireless Unicast Packets This row displays the numbers of unicast packets received and transmitted by the wireless adapter Broadcast Packets This row displays the numbers of broadcast p...

Страница 50: ...ss This field displays the IP address of an associated wireless station Signal Strength This field displays the signal strength of each associated wireless station Status This field displays Associate...

Страница 51: ...ng to a small organization and your Internet access is through an ISP the ISP can provide you with the Internet addresses for your local networks On the other hand if you are part of a much larger org...

Страница 52: ...first three numbers specify the network number while the last number identifies an individual computer on that network Once you have decided on the network number pick an IP address that is easy to re...

Страница 53: ...l notation Subnet Mask Enter the subnet mask Gateway IP Address Type the IP address of the gateway The gateway is a router or switch on the same network segment as the device The gateway helps forward...

Страница 54: ...Chapter 6 System Screen ZyXEL G 570S User s Guide 54...

Страница 55: ...Example of a Wireless Network The wireless network is the part in the blue circle In this wireless network devices A and B use the access point AP to interact with the other devices such as the printe...

Страница 56: ...get the MAC address for each device in the wireless network see the device s User s Guide or other documentation You can use the MAC address filter to tell the ZyXEL Device which devices are allowed...

Страница 57: ...se you have a wireless network with the ZyXEL Device and you do not have a RADIUS server Therefore there is no authentication Suppose the wireless network has two devices Device A only supports WEP an...

Страница 58: ...RIPTION Intra BSS Traffic This describes direct communication not through the ZyXEL Device between two wireless devices within a wireless network You might disable this kind of communication to enhanc...

Страница 59: ...owing table describes the WMM QoS priority levels that the ZyXEL Device uses Fragmentation Threshold A small fragmentation threshold is recommended for busy networks while a larger threshold provides...

Страница 60: ...d to display the screen as shown next This mode has the device act as an access point AP through which wireless stations can communicate and or access a wired network Figure 27 Wireless Settings Acces...

Страница 61: ...BSS traffic is traffic between wireless stations in the same BSS Enable Intra BSS traffic to allow wireless stations connected to the device to communicate with each other Disable Intra BSS traffic t...

Страница 62: ...eless networks Select Dynamic to have the device automatically use short preamble when all wireless clients support it otherwise the device uses long preamble Note The device and the wireless stations...

Страница 63: ...ireless connection when you click Apply to save your settings You must then change the wireless settings of your computer to match the device s new settings Site Survey Click this button to see detail...

Страница 64: ...reless adapters support long preamble but not all support short preamble Select Long preamble if you are unsure what preamble mode the wireless adapters support and to provide more reliable communicat...

Страница 65: ...en you use Wireless Client Bridge or AP Repeater mode You can use only WEP or WPA2 PSK keys to encrypt traffic between APs Table 16 Wireless the AP Survey Screen LABEL DESCRIPTION Site Survey SSID Thi...

Страница 66: ...e throughput degradation and disruption of communications The following examples show two network topologies that can lead to this problem If two or more ZyXEL Devices in bridge mode are connected to...

Страница 67: ...nected to Wired LAN To prevent bridge loops ensure that your ZyXEL Device is not set to bridge mode while connected to both wired and wireless segments of the same LAN Select Bridge as the Operation M...

Страница 68: ...ect Auto 11g 11b to allow either IEEE 802 11b or IEEE 802 11g compliant WLAN devices to associate with the device The transmission rate of your device might be reduced WDS Settings Local MAC Address T...

Страница 69: ...er speed transmissions than regular IEEE 802 11g The other device must also support super G mode in order for the device to use it for the wireless connection This is available when you select a Wirel...

Страница 70: ...tings AP Repeater The following table describes the labels in this screen Table 18 Wireless Settings AP Repeater LABEL DESCRIPTION Basic Settings Operation Mode Select the operating mode from the drop...

Страница 71: ...ced WDS Settings Local MAC Address This is the MAC address of the device Remote MAC Address 1 4 Type the MAC address of the peer device in a valid MAC address format that is six hexadecimal character...

Страница 72: ...preamble but not all support short preamble Select Long preamble if you are unsure what preamble mode the wireless adapters support and to provide more reliable communications in busy wireless networ...

Страница 73: ...table describes the labels in this screen 7 7 2 Wireless Security WEP WEP provides a mechanism for encrypting data using encryption keys Both the AP and the wireless stations must use the same WEP key...

Страница 74: ...ate four different WEP keys Generate After you enter the passphrase click Generate to have the device generates four different WEP keys automatically Key 1 to Key 4 If you want to manually set the WEP...

Страница 75: ...A Key differences between WPA 2 and WEP are user authentication and improved data encryption Table 21 Wireless Security WPA PSK LABEL DESCRIPTION Encryption Method Select WPA PSK WPA2 PSK or WPA PSK W...

Страница 76: ...s your network administrator instructs you to do so with additional information Shared Secret Enter a password up to 63 printable characters as the key to be shared between the external authentication...

Страница 77: ...of wireless stations and encryption key management Once you enable user authentication you need to specify an external RADIUS server on the device for authentication Figure 39 Wireless Security 802 1...

Страница 78: ...enable data encryption Up to 32 stations can access the device when you configure dynamic WEP key exchange Authentication Server IP Address Enter the IP address of the external authentication server...

Страница 79: ...P will appear to be from the first device that connected to the Ethernet port If you turn the device off and back on it again clones the MAC address of the first packets that it receives from devices...

Страница 80: ...associate to permit access to the device MAC addresses not listed will be denied access to the device Select Deny the following MAC address to associate to block access to the device MAC addresses not...

Страница 81: ...PSK key for you if you didn t configure one manually OTIST replaces the pre configured wireless settings on the wireless clients OTIST is not available in AP Repeater or Bridge mode at the time of wr...

Страница 82: ...ch Intelligent Security Technology Setup Key Enter the setup key of up to eight printable characters The default OTIST setup key is 01234567 Note If you change the OTIST setup key here you must also m...

Страница 83: ...ays as shown Enter the same Setup Key as your AP s Click Start when you are ready to begin OTIST Figure 43 ZyXEL Device in Wireless Client Mode OTIST Screen 7 9 2 Starting OTIST You must click Start i...

Страница 84: ...e you see a screen asking you to select one AP to get settings from 7 9 3 Notes on OTIST 1 If you enabled OTIST in the wireless client you see this screen each time you start the utility Click Yes for...

Страница 85: ...ne or two seconds for the AP to transfer settings 4 If you change the SSID or the keys on the AP after using OTIST you need to run OTIST again or enter them manually in the wireless client s 5 If you...

Страница 86: ...Chapter 7 Wireless Screens ZyXEL G 570S User s Guide 86...

Страница 87: ...87 PART III Management and Troubleshooting Management Screens 89 Troubleshooting 95...

Страница 88: ...88...

Страница 89: ...vice s password If you forget your password or the device IP address you will need to reset the device See the section on resetting the device for details Figure 49 Management Password The following t...

Страница 90: ...reen Table 26 Management Password continued LABEL DESCRIPTION Table 27 Management Logs LABEL DESCRIPTION Display Select a category of logs to view Refresh Click Refresh to renew the log screen Clear L...

Страница 91: ...le Information related to factory defaults backup configuration and restoring configuration appears as shown next Figure 51 Management Configuration File 8 4 1 Backup Configuration Backup configuratio...

Страница 92: ...following icon on your desktop Figure 53 Network Temporarily Disconnected If you uploaded the default configuration file you may need to change the IP address of your computer to be in the same subnet...

Страница 93: ...panel to reset the factory defaults of your device Refer to the section on resetting the device for more information on the RESET button 8 5 F W Upload Screen Find firmware at www zyxel com in a file...

Страница 94: ...op Figure 58 Network Temporarily Disconnected After two minutes log in again and check your new firmware version in the System Status screen If the upload was not successful the following status messa...

Страница 95: ...7 Make sure the power adaptor or cord is connected to the ZyXEL Device and plugged in to an appropriate power source Make sure the power source is turned on 8 Disconnect and re connect the power adapt...

Страница 96: ...otten it see the troubleshooting suggestions for I forgot the IP address for the ZyXEL Device 2 Check the hardware connections and make sure the LEDs are behaving as expected See the Quick Start Guide...

Страница 97: ...ake sure the wireless adapter on the wireless station is working properly Check that both the G 570S and your wireless station are using the same ESSID channel and security settings V I cannot ping an...

Страница 98: ...ake sure the LEDs are behaving as expected See the Quick Start Guide and Section 1 5 on page 27 2 Disconnect and re connect the power adaptor to the ZyXEL Device 3 If the problem continues contact you...

Страница 99: ...ppendices and Index Product Specifications 101 Setting up Your Computer s IP Address 107 Pop up Windows JavaScripts and Java Permissions 123 Wireless LANs 129 Customer Support 143 Legal Information 14...

Страница 100: ...100...

Страница 101: ...I MDI X 10 100 Mbps RJ 45 Ethernet port Antenna 1 detachable dipole antenna Power Requirements 12VDC 1 Amp maximum Operation Temperature 0 C 50 C Storage Temperature 30 60 C Operation Humidity 20 95 R...

Страница 102: ...IEEE 802 1x security EAP TLS EAP TTLS LEAP EAP PEAP and Win XP PEAP included 64 128 152 bits WEP WPA WPA2 support based on 802 11i standard Dynamic WEP key exchange MAC address filtering through WLAN...

Страница 103: ...ndard that defines stronger encryption authentication and key management than WPA SSL Passthrough The ZyXEL Device allows SSL connections to go through the ZyXEL Device SSL Secure Sockets Layer uses a...

Страница 104: ...able 32 Wireless Specifications Data Rate Super G 11g 108M 54M 48M 36M 24M 18M 12M 9 6 Mbps auto fallback 11b 11Mbps 5 5Mbps 2Mbps 1Mbps auto fallback Communication Method Half Duplex Transmission Emi...

Страница 105: ...4 8 VOLTAGE DIPS INTERRUPTION EN61000 4 11 EM FIELD FROM DIGITAL TELEPHONES ENV50204 LAN COMPATIBILITY SmartBit FOR WIRELESS PC CARD FCC Part15C Sec15 247 ETS300 328 ETS300 826 CE mark Table 33 Approv...

Страница 106: ...Power 120 Volts AC 60Hz Output Power 12 Volts DC 5 1 Amp Power Consumption 12 Watts Safety Standards UL UK PLUG STANDARDS AC Power Adapter Model AD 121AD Input Power 240 Volts AC 50Hz Output Power 12...

Страница 107: ...a third party TCP IP application package TCP IP should already be installed on computers using Windows NT 2000 XP Macintosh OS 7 and later operating systems After the appropriate TCP IP components are...

Страница 108: ...en click Add 3 Select the manufacturer and model of your network adapter and then click OK If you need TCP IP 1 In the Network window click Add 2 Select Protocol and then click Add 3 Select Microsoft...

Страница 109: ...select Obtain an IP address automatically If you have a static IP address select Specify an IP address and type your information into the IP Address and Subnet Mask fields Figure 61 Windows 95 98 Me T...

Страница 110: ...the TCP IP Properties window 6 Click OK to close the Network window Insert the Windows CD if prompted 7 Turn on your ZyXEL Device and restart your computer when prompted Verifying Settings 1 Click St...

Страница 111: ...570S User s Guide 111 Figure 63 Windows XP Start Menu 2 In the Control Panel double click Network Connections Network and Dial up Connections in Windows 2000 NT Figure 64 Windows XP Control Panel 3 Ri...

Страница 112: ...b in Win XP and then click Properties Figure 66 Windows XP Local Area Connection Properties 5 The Internet Protocol TCP IP Properties window opens the General tab in Windows XP If you have a dynamic I...

Страница 113: ...dd In TCP IP Address type an IP address in IP address and a subnet mask in Subnet mask and then click Add Repeat the above two steps for each IP address you want to add Configure additional default ga...

Страница 114: ...he General tab in Windows XP Click Obtain DNS server address automatically if you do not know your DNS server IP address es If you know your DNS server IP address es click Use the following DNS server...

Страница 115: ...Connections window Network and Dial up Connections in Windows 2000 NT 11 Turn on your ZyXEL Device and restart your computer if prompted Verifying Settings 1 Click Start All Programs Accessories and...

Страница 116: ...acintosh OS 8 9 Apple Menu 2 Select Ethernet built in from the Connect via list Figure 71 Macintosh OS 8 9 TCP IP 3 For dynamically assigned settings select Using DHCP Server from the Configure list 4...

Страница 117: ...onfiguration 7 Turn on your ZyXEL Device and restart your computer if prompted Verifying Settings Check your TCP IP properties in the TCP IP Control Panel window Macintosh OS X 1 Click the Apple menu...

Страница 118: ...in the Subnet mask box Type the IP address of your ZyXEL Device in the Router address box 5 Click Apply Now and close the window 6 Turn on your ZyXEL Device and restart your computer if prompted Veri...

Страница 119: ...low to configure your computer IP address using the KDE 1 Click the Red Hat button located on the bottom left corner select System Setting and click Network Figure 74 Red Hat 9 0 KDE Network Configura...

Страница 120: ...0 KDE Network Configuration DNS 5 Click the Devices tab 6 Click the Activate button to apply the changes The following screen displays Click Yes to save the changes in all screens Figure 77 Red Hat 9...

Страница 121: ...the etc directory The following figure shows an example where two DNS server IP addresses are specified Figure 80 Red Hat 9 0 DNS Settings in resolv conf 3 After you edit and save the configuration fi...

Страница 122: ...root localhost ifconfig eth0 Link encap Ethernet HWaddr 00 50 BA 72 5B 44 inet addr 172 23 19 129 Bcast 172 23 19 255 Mask 255 255 255 0 UP BROADCAST RUNNING MULTICAST MTU 1500 Metric 1 RX packets 717...

Страница 123: ...ernet Explorer Pop up Blockers You may have to disable pop up blocking to log into your device Either disable pop up blocking enabled by default in Windows XP SP Service Pack 2 or allow pop up blockin...

Страница 124: ...web pop up blockers you may have enabled Figure 84 Internet Options Privacy 3 Click Apply to save this setting Enable pop up Blockers with Exceptions Alternatively if you only want to allow pop up wi...

Страница 125: ...uide 125 Figure 85 Internet Options Privacy 3 Type the IP address of your device the web page that you do not want to have blocked with the prefix http For example http 192 168 167 1 4 Click Add to mo...

Страница 126: ...play properly in Internet Explorer check that JavaScripts are allowed 1 In Internet Explorer click Tools Internet Options and then the Security tab Figure 87 Internet Options Security 2 Click the Cust...

Страница 127: ...tings Java Scripting Java Permissions 1 From Internet Explorer click Tools Internet Options and then the Security tab 2 Click the Custom Level button 3 Scroll down to Microsoft VM 4 Under Java permiss...

Страница 128: ...Permissions ZyXEL G 570S User s Guide 128 JAVA Sun 1 From Internet Explorer click Tools Internet Options and then the Advanced tab 2 Make sure that Use Java 2 for applet under Java Sun is selected 3 C...

Страница 129: ...pendent Basic Service Set IBSS The following diagram shows an example of notebook computers using wireless adapters to form an ad hoc wireless LAN Figure 91 Peer to Peer Communication in an Ad hoc Net...

Страница 130: ...red connection between APs is called a Distribution System DS This type of wireless LAN topology is called an Infrastructure WLAN The Access Points not only provide communication with the wired networ...

Страница 131: ...overlap however To avoid interference due to overlap your AP should be on a channel at least five channels away from a channel that an adjacent AP is using For example if your region has 11 channels a...

Страница 132: ...equested transmission Stations can send frames smaller than the specified RTS CTS directly to the AP without the RTS Request To Send CTS Clear to Send handshake You should only configure RTS CTS if th...

Страница 133: ...it and to provide more efficient communications Select Dynamic to have the AP automatically use short preamble when wireless adapters support it otherwise the AP uses long preamble The AP and the wire...

Страница 134: ...dvantages of IEEE 802 1x are User based identification that allows for roaming Support for RADIUS Remote Authentication Dial In User Service RFC 2138 2139 for centralized user profile and accounting m...

Страница 135: ...nt and the RADIUS server for user accounting Accounting Request Sent by the access point requesting accounting Accounting Response Sent by the RADIUS server to indicate that it has started or stopped...

Страница 136: ...wireless clients for mutual authentication The server presents a certificate to the client After validating the identity of the server the client sends a different certificate to the server The exchan...

Страница 137: ...stronger encryption authentication and key management than WPA Key differences between WPA or WPA2 and WEP are improved data encryption and user authentication If both an AP and the wireless clients...

Страница 138: ...with and the packet is dropped By generating unique data encryption keys for every data packet and by creating an integrity checking mechanism MIC with TKIP and AES it is more difficult to decrypt da...

Страница 139: ...t s authentication request to the RADIUS server 2 The RADIUS server then checks the user s identification against its database and grants or denies network access accordingly 3 The RADIUS server distr...

Страница 140: ...RF signals onto air A transmitter within a wireless device sends an RF signal to the antenna which propagates the signal through the air The antenna also operates in reverse by capturing RF signals fr...

Страница 141: ...isotropic antenna An isotropic antenna is a theoretical perfect antenna that sends out radio signals equally well in all directions dBi represents the true gain that the antenna provides Types of Ant...

Страница 142: ...so on point the antenna up For omni directional antennas mounted on a wall or ceiling point the antenna down For a single AP application place omni directional antennas as close to the center of the c...

Страница 143: ...8 2439 Web Site www zyxel com www europe zyxel com FTP Site ftp zyxel com ftp europe zyxel com Regular Mail ZyXEL Communications Corp 6 Innovation Road II Science Park Hsinchu 300 Taiwan Costa Rica Su...

Страница 144: ...ki Finland France E mail info zyxel fr Telephone 33 4 72 52 97 97 Fax 33 4 72 52 19 20 Web Site www zyxel fr Regular Mail ZyXEL France 1 rue des Vergers Bat 1 C 69760 Limonest France Germany Support E...

Страница 145: ...1 U S A Norway Support E mail support zyxel no Sales E mail sales zyxel no Telephone 47 22 80 61 80 Fax 47 22 80 61 81 Web Site www zyxel no Regular Mail ZyXEL Communications A S Nils Hansens vei 13 0...

Страница 146: ...l support ua zyxel com Sales E mail sales ua zyxel com Telephone 380 44 247 69 78 Fax 380 44 494 49 32 Web Site www ua zyxel com Regular Mail ZyXEL Ukraine 13 Pimonenko Str Kiev 04050 Ukraine United K...

Страница 147: ...ice Trademarks ZyNOS ZyXEL Network Operating System is a registered trademark of ZyXEL Communications Inc Other trademarks mentioned in this publication are used for identification purposes only and m...

Страница 148: ...nna or transmitter IEEE 802 11b or 802 11g operation of this product in the U S A is firmware limited to channels 1 through 11 To comply with FCC RF exposure compliance requirements a separation dista...

Страница 149: ...lacement as provided under this warranty is the exclusive remedy of the purchaser This warranty is in lieu of all other warranties express or implied including any implied warranty of merchantability...

Страница 150: ...Appendix F Legal Information ZyXEL G 570S User s Guide 150...

Страница 151: ...148 channel 65 131 interference 131 channel ID 61 68 71 command interface 26 configuration 46 92 configuration file 91 97 connections 101 contact information 143 copyright 147 coverage area 104 CTS C...

Страница 152: ...ernet browser settings 96 IP address 51 92 96 101 L language 89 LEDs 27 95 98 102 login 96 logs 89 90 102 M MAC address 63 101 102 103 maintenance 89 management 89 102 managing the device good habits...

Страница 153: ...tic 92 94 restore 89 91 92 RF frequency range 104 RF interference 98 RJ 45 101 roaming 102 rom 0 file 91 romfile 91 RTS Request To Send 132 threshold 131 132 S safety approvals 104 safety warnings 6 S...

Страница 154: ...es 101 wireless security 65 97 101 102 133 wireless sensitivity 104 wireless signal strength 65 wireless specifications 104 WLAN interference 131 security parameters 140 WMM 59 WMM priorities 59 WPA 1...

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