ZeePedia

Appendix B: Channel Allocations

<< Appendix A: Resources:Antennas and antenna design, Security
Appendix C: Path Loss >>
img
Appendix B: Channel
Allocations
The following tables list the channel numbers and center frequencies used
for 802.11a and 802.11b/g. Note that while all of these frequencies are in the
unlicensed ISM and U-NII bands, not all channels are available in all coun-
tries. Many regions impose restrictions on output power and indoor / outdoor
use on some channels. These regulations are rapidly changing, so always
check your local regulations before transmitting.
Note that these tables show the center frequency for each channel. Chan-
nels are 22MHz wide in 802.11b/g, and 20MHz wide in 802.11a.
802.11b / g
Channel
Center Frequency
Channel
Center Frequency
#
(GHz)
#
(GHz)
1
2.412
8
2.447
2
2.417
9
2.452
3
2.422
10
2.457
4
2.427
11
2.462
5
2.432
12
2.467
6
2.437
13
2.472
7
2.442
14
2.484
379
img
380 Appendix B: Channel Allocations
802.11a
Channel
Center Frequency
#
(GHz)
34
5.170
36
5.180
38
5.190
40
5.200
42
5.210
44
5.220
46
5.230
48
5.240
52
5.260
56
5.280
60
5.300
64
5.320
149
5.745
153
5.765
157
5.785
161
5.805
Table of Contents:
  1. Where to Begin:Purpose of this book, Fitting wireless into your existing network, Wireless networking protocols
  2. A Practical Introduction to Radio Physics:What is a wave?, Polarization
  3. Network Design:Designing the physical network, Mesh networking with OLSR, Estimating capacity
  4. Antennas & Transmission Lines:Cables, Waveguides, Connectors and adapters, Amplifiers
  5. Networking Hardware:Wired wireless, Choosing wireless components, Building an access point from a PC
  6. Security & Monitoring:Physical security, Threats to the network, Authentication
  7. Solar Power:Solar energy, Photovoltaic system components, The battery
  8. Building an Outdoor Node:Waterproof enclosures, Providing power, Mounting considerations
  9. Troubleshooting:Building your team, Proper troubleshooting technique, Common network problems
  10. Economic Sustainability:Create a Mission Statement, Evaluate the Demand for Potential Offerings
  11. Case Studies:General advice, Crossing the divide with a simple bridge in Timbuktu, Networking Mérida State
  12. Appendix A: Resources:Antennas and antenna design, Security
  13. Appendix B: Channel Allocations
  14. Appendix C: Path Loss
  15. Appendix D: Cable Sizes
  16. Appendix E: Solar Dimensioning:General Data, Component Characteristics
  17. Glossary