User's Manual

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Table Of Contents

User’s Guide
Copyright
Certifications
ZyXEL Limited Warranty
Safety Warnings
Customer Support
Table of Contents
List of Figures
List of Tables
Preface
Getting Started
- 1.2.0.1 Infrastructure
- 1.2.0.2 Ad-Hoc
- 1.3 AG-120 Hardware and Utility Installation
  - 1.4.1 Enabling WZC
  - 1.4.2 Accessing the ZyXEL Utility
Tutorial
- 2.1 Connecting to a Wireless LAN
- 2.2 Creating and Using a Profile
Wireless LAN Network
- 3.2.1 User Authentication and Encryption
- 3.3.1 Enabling OTIST
  - 3.3.1.1 AP
  - 3.3.1.2 Wireless Client
- 3.3.2 Starting OTIST
- 3.3.3 Notes on OTIST
ZyXEL Utility Configuration
- 4.1 The Link Info Screen
  - 4.1.1 Trend Chart
- 4.2 The Site Survey Screen
  - 4.2.1 Security Settings
  - 4.2.2 Confirm New Settings
- 4.3 The Profile Screen
  - 4.3.1 Adding a New Profile
- 4.4 The Advanced Screen
- 4.5 The Adapter Screen
Maintenance
Troubleshooting
- 6.1 Problems Starting the ZyXEL Utility
- 6.2 Problem with the Link Quality
- 6.3 Problems Communicating With Other Computers
Product Specifications
Management with Wireless Zero Configuration
- Activating Wireless Zero Configuration
- Connecting to a Wireless Network
- Security Settings
- Association
- Authentication
- Ordering the Preferred Networks
Wireless Security
- Types of EAP Authentication
- EAP-MD5 (Message-Digest Algorithm 5)
- EAP-TLS (Transport Layer Security)
- EAP-TTLS (Tunneled Transport Layer Service)
- PEAP (Protected EAP)
- LEAP
- Dynamic WEP Key Exchange
- WPA and WPA2
- Encryption
- User Authentication
- WPA(2)-PSK Application Example
- WPA(2) with RADIUS Application Example
- Security Parameters Summary
Setting up Your Computer’s IP Address
- Windows 95/98/Me
- Installing Components
- Configuring
- Verifying Settings
- Windows 2000/NT/XP
- Verifying Settings
- Macintosh OS 8/9
- Verifying Settings
- Macintosh OS X
- Verifying Settings
Index
- A
- C
- D
- E
- F
- G
- H
- I
- L
- M
- N
- O
- P
- Q
- R
- S
- T
- U
- V
- W
- Z

ZyXEL AG-120 User’s Guide

Chapter 6 Troubleshooting 61

CHAPTER 6

Troubleshooting

This chapter covers potential problems and the possible remedies. After each problem

description, some instructions are provided to help you to diagnose and to solve the problem.

6.1 Problems Starting the ZyXEL Utility

6.2 Problem with the Link Quality

Table 15 Troubleshooting Starting ZyXEL Utility

PROBLEM CORRECTIVE ACTION

Cannot start the

ZyXEL Wireless

LAN utility

Make sure the AG-120 is properly inserted and the LED(s) is on. Refer to the

Quick Start Guide for the LED descriptions.

Use the Device Manager to check for possible hardware conflicts. Click Start,

Settings, Control Panel, System, Hardware and Device Manager. Verify the

status of the AG-120 under Network Adapter. (Steps may vary depending on the

version of Windows).

Install the AG-120 in another computer.

If the error persists, you may have a hardware problem. In this case, you should

contact your local vendor.

The ZyXEL utility

icon does not

display.

If you install the Funk Odyssey Client software on the computer, uninstall (remove)

both the Funk Odyssey Client software and ZyXEL utility, and then install the

ZyXEL utility again after restarting the computer.

Table 16 Troubleshooting Link Quality

PROBLEM CORRECTIVE ACTION

The link quality

and/or signal

strength is poor all

the time.

Search and connect to another AP with a better link quality using the Site Survey

screen.

Move your computer closer to the AP or the peer computer(s) within the

transmission range.

There may be too much radio interference (for example microwave or another AP

using the same channel) around your wireless network. Lower the output power of

each AP.

Make sure there are not too many wireless stations connected to a wireless

network.