Preface
Purpose of This Guide
This guide is intended for network administrators who are responsible for installing and maintaining the AT-AR221E
Cable/DSL Router.
How This Guide is Organized
This guide contains the following chapters and appendices:
Chapter 1, Introduction, describes the features, functions, LEDs, and ports on the router.
Chapter 2, Installation, describes how to install the router.
Chapter 3, Configuration Wizard, describes the procedures for accessing the router through its Web interface and for
quickly configuring the router.
Chapter 4, Basic Settings, describes the procedures for manually configuring the basic parameters.
Chapter 5, Advanced Configuration, describes the procedures for entering configurations on advanced router features.
Chapter 6, System Status and Help describes the procedures for getting on-line help with the router.
Chapter 7, Setting Up Client Computers for Internet Access, describes the procedures for configuring a Windows
client.
Chapter 8, Troubleshooting, describes procedures for resolving error conditions on the router.
Appendix A, Specifications, provides router specifications.
Appendix B, Translated Electrical Safety and Emission Information, contains multi-language translations of the
cautions and warnings in this manual.
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