only in your dreams, probably! i must admit to not knowing the specific
to get that range, omni, you'd need an amplifier on every node. i'd be
an.2004.10.07.18.37.52.70573@xxxx.swaggie.net...--
an.2004.10.07.18.37.52.70573@xxxx.swaggie.net...remove the "-".
yes, you can have omni at one end. In fact the legal limit is EIRP, so it
thats requires for 54mbs.
Yes its legal. legal is 4 W EIRP. You can use any 802.11b equipment to get
"will kemp" <will@xxxx.swaggie.net> wrote in message
news
On Thu, 07 Oct 2004 09:57:19 -0700, Roberto wrote:
How to extend wireless ethernet (802.11b and/or 802.11g) connection
range to omni-directional 2-3km?
only in your dreams, probably! i must admit to not knowing the specific
technicalities of this, but i'd hazard a guess that under the right
circumstances you could probably get 2-3km,
remove the "-".
23km is barely possible within no license legal limits for 802.11b.
15km is doable.
but not omnidiretional.
yes, you can have omni at one end. In fact the legal limit is EIRP, so it
doesnt matter if you use omni or directional, you really only have to
boost signal *INTENSITY* up to legal limit.
but calculate out the dBm and required signal level for discrimination ..
receiver sensitivity increases on the higher output cards too , so first
boost card power and then boost antenna.
with
the right yagi antennas at both ends, you might have a chance of getting
that distance, but that's strictly directional. it would rely on the gain
of a directional antenna.
thats requires for 54mbs.
Does it need power amplifier and special antenna if so is it
license-free?
to get that range, omni, you'd need an amplifier on every node. i'd be
very surprised if that was legal!
Yes its legal. legal is 4 W EIRP. You can use any 802.11b equipment to
get that.
Most access points and retail cards are 30mW or so with low sensitivity.
You can improve on this with professional cards and amps.
http://www.freenet-antennas.com/amplifiers.htm
oh well, there ya go! talking out of my arse again (as usual)! ;-)
You dont usually need an amp, but they are available here;
Better prices at techtopia
This bit is at least fairly accurate.If you can't get line of sight, forget it
The old Galaxy/Austar MDS (Mesh backed) 2.5Ghz dishes make very niceIn aus.computers.linux Lord-Data <data@ihug.com.au> wrote:
If you look at "geurilla nets", it can be done, but the equipment needed
for
the "central location" is not cheap .. it is omnidirectional tho ..
You dont usually need an amp, but they are available here;
http://www.techtopia.com.au/index.php/cPath/1_27
For an AP servicing points within 2 - 3 km, then something fairly high
senstivity like the senaos at 100mW is good, for both the AP and
clients.
http://www.x.net.au/
Better prices at techtopia
If you can't get line of sight, forget it
This bit is at least fairly accurate.
You can buy 2.4GHz feedhorns from Hills (IIRC) reasonably cheap."till" <not@here.com> wrote in message
news:1097392936.515335@sodium.indigo.net.au...
In aus.computers.linux Lord-Data <data@ihug.com.au> wrote:
If you look at "geurilla nets", it can be done, but the equipment
needed
for
the "central location" is not cheap .. it is omnidirectional tho ..
You dont usually need an amp, but they are available here;
http://www.techtopia.com.au/index.php/cPath/1_27
For an AP servicing points within 2 - 3 km, then something fairly high
senstivity like the senaos at 100mW is good, for both the AP and
clients.
http://www.x.net.au/
Better prices at techtopia
If you can't get line of sight, forget it
This bit is at least fairly accurate.
The old Galaxy/Austar MDS (Mesh backed) 2.5Ghz dishes make very nice ~
14Db antennas with some quite simple reworking. And they are dime a dozen
at least in this area - several hundred on rooftops and tv towers here -
unused since
they changed to all satellite. My mother in law lives a block away, and
has one, so
I will be modifying that so that we can network her computer onto our lan.
LOL she
thinks it borders on black magic......
Geoff in South Oz