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IEEE [1] 802.11a [2], is a wireless ethernet standardisation effort
that supports high bit rates (54Mbits), but uses the 5 GHz ISM [3]
band, and so is not backward compatible with 802.11b [4] gear.
Several manufacturers have released 802.11a [5] equipment, including
Proxim [6] and Intel.
Some of the technology for 802.11a [7] was developed here in
Australia by the CSIRO [8].
The 802.11a [9] equipment currently available operates on frequencies
which are illegal for outdoors use in Australia, and in any case the
standard has technical characteristics which would seem to make it not
very useful for long-distance networks.
802.11g [10] provides the same speed (since it also uses OFDM [11]),
but works in the 2.4GHz ISM [12] band.
-------------------------
Back to 802.11 [13]
Links:
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[1] http://melbournewireless.org.au/?IEEE
[2] http://melbournewireless.org.au/?802.11a
[3] http://melbournewireless.org.au/?ISM
[4] http://melbournewireless.org.au/?802.11b
[5] http://melbournewireless.org.au/?802.11a
[6] http://melbournewireless.org.au/?Proxim
[7] http://melbournewireless.org.au/?802.11a
[8]
http://www.csiro.au/index.asp?type=achievement&id=IT%20and%20Telecommunications_WirelessLANstandard%20UsesCSIRO
[9] http://melbournewireless.org.au/?802.11a
[10] http://melbournewireless.org.au/?802.11g
[11] http://melbournewireless.org.au/?OFDM
[12] http://melbournewireless.org.au/?ISM
[13] http://melbournewireless.org.au/?802.11
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