Does wireless LAN work over Vertical Line-of-Sight ?
spyce girl
extension office on the ground floor. The relative location of both
offices inside the building is exactly the same, just on different
floors, meaning if I looked down from the window of our 6th floor
office, I can directly see the window of our ground floor office. Is
this a valid line-of-sight for a wireless lan to work properly?
We currently have a wired LAN on the 6th floor office. We hope to be
able to connect PCs from the extension office to this LAN for file
sharing purposes. I talked to a local PC vendor about this and his
response was that "line-of-sight" standard only applied to horizontal
distances, not vertical ones. Is this true?
What about omni-directional antennas? Would these help and is it
strong enough to traverse the distance of 5 floors vertically?
Any info/advice would be greatly appreciated!
Yours truly,
Spycegirl
BruceR
and you'll have vertical propagation. Think of the propagation from an
omni as a donut with the antenna sticking through the hole. You could
also use a pair of cantennas with one looking down and the other looking
up - aimed at each other - for a very solid link.
"spyce girl" <paran...@yahoo.com> wrote in message
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Wormhole
My experience shows that it will work vertically but the construction of the
floor material will dictate if the signal gets through as well as whether
you are using wireless a or b protocol. I have not seen too much success in
getting a signal through reinforced concrete which it sounds like you might
have. Manufacturers specs are very liberal with how far sigs will go and I
have found that you can take them with a grain of salt until you set it up
for yourself. I have seen "a" protocol work through wooden floors to a depth
of maybe 3 stories which is supposed to be somewhat better than "b"
protocol. It's a crapshoot to see if you can get them through 6 stories and
if you do and it's successful, go buy a lottery ticket the same day because
you've had some very good luck.
John
signal, the stronger the signal will remain. 6 concrete floors, most likely
reinforced concrete, will most likely introduce too much signal attenuation
for a good link. Why not drop a wire out one window, down the building and
into the other? Or put the bridging AP's outside each window avoiding the
floors altogether.
"spyce girl" <paran...@yahoo.com> wrote in message
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Brian
you have access to get a cable outside and mount an antenna on the side of
the building firing down (like a very small yagi or patch antenna) and the
same on the ground floor aiming up. try fab-corp.com for antenna ideas.
Other option I would go for is get a cat 5 run from the 6th floor to the
first floor, probably cost the same to get that done (buildings have plenums
designed to run this cable!!) and will be much faster and more reliable.
"spyce girl" <paran...@yahoo.com> wrote in message
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K Bloch
buildings due to the rebar in the floor. Best thing to link the floors
is CAT5 ethernet cable down the central wiring closet in the building.
Most commercial buildings will have a central wiring closet that runs
from top to bottom on all floors. Have a few cat5 cables run and you
will be much better off. Running just one cable is not reccomended as
there would be no provisions in the event of a failure.
CAT5 ethernet will also allow you to connect at 100 mbits per second
versus the 5.5 mbit sustained rate of 802.11b. In the long run you
will appriciate the extra performance.
And never buy anything from idiot was who told you about vertical vs
horizontal line of sight is different. Line of sight is line of sight.
The only difference is in the orientation of the antennas.
#HISH
horizontal line of sight - dont buy squat from that character.
Wayno
K Bloch <kbloc...@hotmail.com> wrote in message
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