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Wireless Range / Reliability

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Anonymous
a b F Wireless
June 7, 2004 12:42:25 PM

Archived from groups: alt.internet.wireless (More info?)

Sorry to bring this up again, but I am somewhat confused by the varying
claims and counter-claims I have seen on this group...

I have seen a lot of effort going into making the signal strength 100% by
installing loads of kit... and yet there is concern over wireless emissions.

Is 100% signal strength mandatory for a wireless connection to work
reliably?

I have a D-Link unit which worked (albeit only over a couple of rooms) with
very poor signal strength, eventually traced to the antenna wire not being
soldered to the pad on the PCB.

Can a PC / Laptop work happily at the hundreds of meters distance from the
WAP as claimed in the literature... my limited testing seems to indicate
that this is possible...

So, is anyone using this technology over the 28, 000 meters I have seen,
claimed for some of the hi-gain antennae?

Is it reliable at this distance, and what factors are likely to influence
this reliability? Rain / Snow / weather? Motor traffic? Electrical
appliances?

Does anyone wish to claim the longest reliable link, and explain how it is
done?

Regards

John
June 7, 2004 3:25:51 PM

Archived from groups: alt.internet.wireless (More info?)

John Beeston wrote:

> Sorry to bring this up again, but I am somewhat confused by the varying
> claims and counter-claims I have seen on this group...
>
> I have seen a lot of effort going into making the signal strength 100% by
> installing loads of kit... and yet there is concern over wireless emissions.
>
> Is 100% signal strength mandatory for a wireless connection to work
> reliably?
>
> I have a D-Link unit which worked (albeit only over a couple of rooms) with
> very poor signal strength, eventually traced to the antenna wire not being
> soldered to the pad on the PCB.
>
> Can a PC / Laptop work happily at the hundreds of meters distance from the
> WAP as claimed in the literature... my limited testing seems to indicate
> that this is possible...
>
> So, is anyone using this technology over the 28, 000 meters I have seen,
> claimed for some of the hi-gain antennae?
>
> Is it reliable at this distance, and what factors are likely to influence
> this reliability? Rain / Snow / weather? Motor traffic? Electrical
> appliances?
>
> Does anyone wish to claim the longest reliable link, and explain how it is
> done?
>
> Regards
>
> John


70% RSSI and 70% signal strength is what some people shoot for to do a
very reliable link. Anything above that is gravy. 28,000 meters? That
kind of distance and much more is certainly possible, but usually
involves towers, very high gain antennas, maybe an RF engineer or three
- in other words, not for the general public.

Rain doesn't affect the signal, however snow and ice building up on the
antennas can knock a link out. Motors and electrical appliances normally
do not affect links with the exception of microwave ovens - they operate
at the same frequency as much of the consumer wireless gear.

Longest link? Maybe: http://tinyurl.com/yq9fo
Anonymous
a b F Wireless
June 7, 2004 8:38:28 PM

Archived from groups: alt.internet.wireless (More info?)

"John Beeston" <john.Beeston@talk21.com> wrote in
news:MUUwc.11918$NK4.1599604@stones.force9.net:

> Is 100% signal strength mandatory for a wireless connection to work
> reliably?

No, but as your signal gets weaker, your speeds get slower.

> Can a PC / Laptop work happily at the hundreds of meters distance from
> the WAP as claimed in the literature... my limited testing seems to
> indicate that this is possible...

Yes, but only if there is a clear line of sight.

> So, is anyone using this technology over the 28, 000 meters I have
> seen, claimed for some of the hi-gain antennae?

28KM? I guess that is possible if you have a clear line of sight - high
powered WiFi equipment and a strong amplifier. I never heard of 28KM,
but I heard of people using it upto 5+ miles.

> Is it reliable at this distance, and what factors are likely to
> influence this reliability? Rain / Snow / weather? Motor traffic?
> Electrical appliances?

Obstacles such as trees and buildings cut down on range significantly.


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