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NWD-211AN User’s Guide
95
CHAPTER 7
Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The
potential problems are divided into the following categories.
• Power, Hardware Connections, and LEDs
• Accessing the ZyXEL Utility
• Link Quality
• Problems Communicating with Other Computers
7.1 Power, Hardware Connections, and LEDs
The NWD-211AN does not turn on. None of the LEDs turn on.
1 Make sure the NWD-211AN is correctly installed (refer to your Quick Start Guide).
2 Restart the computer to which the NWD-211AN is attached.
3 If the problem continues, contact the vendor.
One of the LEDs does not behave as expected.
1 Make sure you understand the normal behavior of the LED. See Section 1.2 on
page 22.
2 Check the hardware connection. See the Quick Start Guide and Section 1.2 on
page 22.
3 Restart the computer to which the NWD-211AN is attached.
4 If the problem continues, contact the vendor.
- NWD-211AN 1
- About This User's Guide 3
- Document Conventions 4
- Icons Used in Figures 5
- Safety Warnings 6
- Contents Overview 7
- Chapter 3 10
- Chapter 4 10
- Table of Contents 12
- List of Figures 13
- List of Tables 17
- Introduction and 19
- Configuration 19
- CHAPTER 1 1 21
- 1.2 About Your NWD-211AN 22
- Table 3 NWD-211AN LEDs 23
- 1.3 Application Overview 24
- 1.4.1 ZyXEL Utility Icon 25
- 1.5 Configuration Methods 26
- CHAPTER 2 27
- Setup (WPS) 28
- 2.2.2 PIN Configuration 30
- Chapter 2 Tutorial 39
- Chapter 2 Tutorial 40
- CHAPTER 3 41
- 3.2 Wireless LAN Overview 42
- 3.3 Wireless LAN Security 43
- 3.3.1.2 IEEE 802.1x 44
- 3.4 Wi-Fi Protected Setup 45
- 3.4.2 PIN Configuration 46
- 3.4.3 How WPS Works 48
- Figure 24 How WPS works 49
- REGISTRARENROLLEE 50
- SECURITY INFO 50
- REGISTRAR 50
- ENROLLEE 50
- EXISTING CONNECTION 50
- 3.4.4 Limitations of WPS 51
- CHAPTER 4 53
- 4.1.2 What You Need to Know 54
- 4.1.3 Before You Begin 55
- 4.3 The Link Info Screen 56
- 4.3.1 Trend Chart 57
- 4.4 The Site Survey Screen 58
- 4.4.1 Security Settings 59
- 4.4.1.2 WPA-PSK/WPA2-PSK 61
- 4.4.1.3 WPA/WPA2 62
- 4.4.1.4 IEEE 802.1x 63
- 4.5 The Profile Screen 65
- Table 14 Profile 66
- Figure 38 Profile 66
- 4.5.1 Adding a New Profile 67
- 4.6 The Adapter Screen 71
- 4.7.1 Using PEAP in Vista 75
- 4.7.2 Using TLS in Vista 76
- CHAPTER 5 79
- 5.1.2 What You Need to Know 80
- 5.2 AP Mode Screen Summary 81
- 5.3 The Link Info Screen 82
- Table 22 Configuration 83
- 5.4.1 Security Settings 85
- 5.4.1.3 WPA-PSK/WPA2-PSK 87
- 5.5 The MAC Filter Screen 88
- CHAPTER 6 89
- 6.2 The About Screen 90
- Chapter 6 Maintenance 92
- Troubleshooting 93
- CHAPTER 7 95
- 7.3 Link Quality 96
- Computers 97
- Chapter 7 Troubleshooting 98
- CHAPTER 8 99
- NWD-211AN User’s Guide 100
- SOFTWARE SPECIFICATIONS 102
- WIRELESS FEATURES 102
- PART III 105
- APPENDIX A 107
- Windows XP/NT/2000 108
- Properties 109
- Verifying Settings 111
- Windows Vista 112
- APPENDIX B 117
- Figure 77 Basic Service Set 118
- Figure 79 RTS/CTS 120
- Fragmentation Threshold 121
- Preamble Type 121
- IEEE 802.11g Wireless LAN 121
- Wireless Security Overview 122
- IEEE 802.1x 123
- Types of EAP Authentication 124
- PEAP (Protected EAP) 125
- Dynamic WEP Key Exchange 126
- WPA and WPA2 126
- Encryption 127
- User Authentication 128
- Security Parameters Summary 130
- Antenna Overview 131
- Antenna Characteristics 131
- Types of Antennas for WLAN 131
- Positioning Antennas 132
- APPENDIX C 133
- Figure 86 Vista: Connecting 135
- LABEL DESCRIPTION 138
- Setting Up An Ad-Hoc Network 140
- Windows XP 142
- Security Settings 150
- APPENDIX D 157
- Industry Canada Statement 159
- IMPORTANT NOTE 159
- ZyXEL Limited Warranty 160
- Registration 161
- Appendix D Legal Information 162
- APPENDIX E 163
- Costa Rica 164
- Czech Republic 164
- Kazakhstan 166
- Malaysia 166
- North America 166
- Singapore 167
- Thailand 168
- United Kingdom 169
- Appendix E Customer Support 170
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