On Fri, 17 Dec 2004 04:27:26 GMT, "KT" <(E-Mail Removed)> wrote:
>I have a client who wants to be able to use his existing wireless network
>(Linksys 54G) from one end of his house to the other (HUGE HOME with PLENTY
>of barrier). We have tried putting in the Linksys Booster/Repeater, but it
>did NOT do anything at all.
Power amps don't work. Let's say you install the worlds biggest
illegal overpowered amplifier on the sole access point. It now
transmits huge amounts of RF and has fantastic transmit range. Just
one problem. It can't hear any better than the original access point,
which is already at the limit of receiver sensitivity. So, the
wireless client radios (laptops and PDA's) are still running an
insipid +15dBm and have no more range than before. The clients can
hear the overpowered access point, but the access point can't hear
them. Range is exactly the same as without the amplifier.
>Any suggestions to get Wireless to work this way? And please it must be
>wireless.
1. Lots of access points with a wired (CAT5) backbone. If the wired
backbone is a problem, look into AC power line backbone.
http://www.homepna.org
The catch is that such a backbone is very slow.
2. Wireless store and forward repeaters using WDS (wireless
distribution something). Each box can act as an access point and a
repeater simultaneously. Big problem is that each hop cuts your
bandwidth in half.
3. CATV antenna system. I'm not very proud of this install, but it
did sorta work. Customer had duplex RG-6/u coax in the walls. Since
they only needed one coax cable, I borrowed the 2nd coax for wireless.
I made some cute little 2.4GHz antennas with F connectors, and shoved
them into the wall plate receptacles. The coax cables went a central
location when they came together at two access points and a rather
ugly power splitter. The longest run was about 50ft. The losses were
horrible but the numbers showed that it should work at close range (<
15ft). It worked.
4. HVAC waveguide. Another of my butcher jobs that should not have
worked, but did. This was a hospital that required 17 signatures and
divine intervention to make any mechanical or electrical changes. I
decided that since each room had a nice convenient sheet metal HVAC
duct, I could use the whole HVAC system as a wireless distribution
system. I built a rather ugly horn antenna and used it to feed the
ducting. Useable range limit was about 500ft plus about 10ft in each
room. The grills forced horizontal polarization. It worked fairly
well for about 9 months until the safety people decided that I might
be ionizing the air or something and demanded that I remove the horn.
However, by that time, a proper access point and CAT5 backbone system
was approved and budgeted.
5. Illuminate from outside. Big houses tend to have big picture
windows. I lit up one large mansion, by placing a single access point
and directional sector antenna on a nearby garage roof. The other
side of the house was similarly illuminated from a storage shed in the
yard. I had to add a few access points inside for hallways,
stairwells, and inside storage areas. It's so much easier to go
through outside glass, than through inside walls. Watch out for metal
venetian blinds that will force horizontal polarization.
--
Jeff Liebermann
(E-Mail Removed)
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558