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Date: | Wed, 29 Mar 2006 01:49:04 -0800 |
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On 28 Mar 2006 at 18:51, Paul A. Shippert wrote:
> I am a bit surprised that you could pick up a wireless signal at 1000
> feet. My guess is that your laptop NIC is not a G, but maybe a B or A
> wireless adapter. It is my understanding (and I could certainly be
> wrong) that the G standard (whether wired or wireless) only has
> approximately half of the effective range of regular ethernet or
> wireless B or A networking, due to the compression scheme used to
> increase the transmission speed. It may be necessary to add more
> repeaters between the signal source and the intended destination, in
> order for wireless G receivers to get a signal. Hopefully more
> members can correct any mistaken conclusions I've made and provide
> some more wisdom.
>
> Paul A. Shippert
The 802.11g standard includes a variety of data rates using different
modulation schemes; lower data rates are able to carry for longer distances
or cope with noisier airwaves.
The modulation schemes G uses for rates of 11 Mbps and below are precisely
those used for 802.11b. So although G offers much better data rates at
short distances under good conditions, its long range performance is exactly
the same as B. And, unless specifically excluded, B devices can
interoperate with G devices and services.
(A offers similar rate/range performance to G, but because of its higher
frequency it uses more power to achieve that, and A gear is typically more
expensive than G.)
I believe the current record for a B signal, using directional antennas
under optimal conditions, is about 25 miles. I routinely see usable signals
at about 1000 feet.
David Gillett
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