[Cu-wireless] Re: tentative wireless penetration table

Jeff Thompson jwthomp at meat.net
Wed May 23 13:02:40 CDT 2001

Just thought people might be interested to hear a recent experience, ok
actually two.

I've set up a linksys access point at home that connects to a linksys 4
port dsl router (plugged into my cable modem).  I have a PC upstairs with
a linksys 802.11b card (I think best buy temporarily mismarked these items
because everything was really cheap, two days later it all jumped back up
in price)  I'm getting about a 50% strength signal as reported by the wlan
monitor program.

The AP is on the floor on my houses northern most wall.  The bed room is
on the second story above the garage south of the AP.  The signal has to
travel partially through a couch and any human inhabitants, through a wood
closet door, coats and junk, through a interior wall, and through a desk
to the PC upstairs which has a PCMCIA card attached on the floor with only
an internal antenna on the card.  I have an iBook on order with an airport
card and will do some mobile testing around the house to see how far I can

We recently set up a wireless bridge network at work to get internet
conncetivity at building across the street.  Both AP's (Intel 2011 APs)
are up against glass windows.  One window has a screen mesh (likely very
very bad).  The line of site is very poor as there are cars and numerous
trees in the way.  Suprisingly the link is also quite good.  We testing
the links capability if both APs were within close proximity and did a
test download of Adobe Acrobat reader (ok this isn't scientific :) ), and
saw 60 - 70k.  With one AP moved across the street we saw a 40 - 60k
speed.  Not too bad if you consider the poor line of site.  We may move
the AP's later and hook up directional antennas rather than the omni's
we are using now for better signal, but in  truth I'm pretty happy with
what we have. In fact this email is flying over the air. :)



Jeff Thompson
Software Evangelist and Visionary
Argus Systems Group, Inc.

On Wed, 23 May 2001, Paul Riismandel wrote:

> Antennas are a big issue at that short of a wavelength, and a transmitting
> antenna is more critical than receiving.  It would make sense to me that a
> base station have a better antenna than a PC card, though such common sense
> may not actually bare out.
> Are all basic wireless networks using 2.4 Ghz?
> --Paul
> At 11:41 AM 5/23/01 -0500, David Young wrote:
> >On Wed, May 23, 2001 at 11:36:09AM -0500, Zachary C.Miller wrote:
> > > I'd like to know whether the "wireless ethernet base stations" get
> > > more range than the individual wireless cards or whether they are just
> > > simply routers with standard issue cards in them.
> >
> >The Apple Airport base station contains an ordinary Lucent PC Card. So,
> >too, does the Lucent RG-1000 Residential Gateway. The cards may plug
> >into improved antennas, I don't remember.
> >
> >Dave
> >
> >--
> >David Young                   On the Job Consulting
> >dyoung at onthejob.net     Urbana, IL * (217) 278-3933
> >
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