User's Manual
Table Of Contents
- Reference Manual for the Model CG814W Wireless Cable Modem Gateway
- Contents
- About This Manual
- Chapter 1 Introduction 1-1
- Chapter 2 Connecting the Gateway to the Internet 2-1
- Chapter 3 Wireless Configuration 3-1
- Chapter 4 Protecting Your Network 4-1
- Chapter 5 Managing Your Network 5-1
- Chapter 6 Troubleshooting 6-1
- Appendix A Technical Specifications A-1
- Appendix B Networks, Routing, and Firewall Basics B-1
- Appendix C Preparing Your Network C-1
- Glossary G-1
- About This Manual
- Chapter 1 Introduction
- Chapter 2 Connecting the Gateway to the Internet
- Chapter 3 Wireless Configuration
- Chapter 4 Protecting Your Network
- Chapter 5 Managing Your Network
- Chapter 6 Troubleshooting
- Appendix A Technical Specifications
- Appendix B Networks, Routing, and Firewall Basics
- Related Publications
- Basic Router Concepts
- Internet Security and Firewalls
- Wireless Networking Overview
- Authentication and WEP
- Wireless Channels
- Ethernet Cabling
- Appendix C Preparing Your Network
- Glossary
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
B-18 Networks, Routing, and Firewall Basics
Wireless Channels
IEEE 802.11 wireless nodes communicate with each other using radio frequency signals in the
ISM (Industrial, Scientific, and Medical) band between 2.4 GHz and 2.5 GHz. Neighboring
channels are 5 MHz apart. However, due to spread spectrum effect of the signals, a node sending
signals using a particular channel will utilize frequency spectrum 12.5 MHz above and below the
center channel frequency. As a result, two separate wireless networks using neighboring channels
(for example, channel 1 and channel 2) in the same general vicinity will interfere with each other.
Applying two channels that allow the maximum channel separation will decrease the amount of
channel cross-talk, and provide a noticeable performance increase over networks with minimal
channel separation.