In contrast, the 802.11a standard uses eight independent channels. These additional channels allow 802.11a
networks to deliver up to 13 times more throughput than 802.11b networks with less interference—across
floors and between them.
The numbers tell the tale. 802.11a is superior.
802.11a—less interference from other wireless devices.
Another reason for the superior performance of 802.11a is that it operates in the uncongested 5 GHz UNII
band. In contrast, 802.11b operates in the highly congested 2.4 GHz ISM band. Wireless LAN-connected
computers using 802.11b must compete with many other devices—including cordless phones, microwave ovens,
and Bluetooth products—for connections in the same spectrum. This means that signals are sometimes not as
clear and throughput can be diminished.
802.11a—a worldwide standard.
Multi-national corporations, governmental organizations, and others who require standardization of systems
worldwide will be pleased to note that 802.11a has been certified in over 15 countries in North America
including the United States, Canada and Mexico, in over 10 countries in Western Europe and in Japan. With
more countries certifying every day, 802.11a is well on its way to being the global wireless LAN standard. With
global certification, corporations will be able to deploy 11a in their offices around the world and their business
travelers will be able to count on the best performing wireless LAN, 11a, no matter where they work.
4 PROXIM
❘
www.proxim.com
Device 802.11a 802.11b
Data Rate Up to 54 Mbps Up to 11 Mpbs
108 Mbps in Proxim 2X Mode
Spectrum 5.15 GHz to 5.35 GHz 2.5 GHz spectrum
UNII spectrum
Channels 8 non-overlapping 3 non-overlapping
Maximum Distance 300ft. 300 ft.
Number of Users Best suited for large numbers of Best suited for a small number
users in enterprise environments of users per access point
Application Suitability Handles large files Works well for lower bandwidth
(i.e. CAD, PowerPoint) applications such as Internet
as well as streaming video browsing and e-mail access
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