Also you should note that the 3 offices that connect to the office serving as multipoint will share the bandwitdh meaning that if you use G APs (most likely) then you´ll have 54 MB shared between the 3 offices. So if the servers are located at the multipoint site and you have heavy traffic from the 3 offices they might end up making a mess of things.
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by: Darr247Posted on 2008-12-02 at 21:20:15ID: 23083415
> all 4 offices have clear line of sight.
om/item.as px?id=1718 om/product family.asp x?id=258
roduct.php ?action=pr oduct& clas s1_id=1&cl ass2_id=3& class3_id= 158&produc t_id=4 roduct.php ?class1_id =226& class 2_id=278 roduct.php ?class1_id =226& class 2_id=279 roduct.php ?class1_id =226& class 2_id=280
roduct.php ?action=pr oduct& prod uct_id=183 or http://www.hyperlinktech.c om/item.as px?id=917 - then the N-male to AP-specific-connector pigtail needs to be long enough to reach from that fitting to the AP indoors. Do NOT mount an antenna outdoors without putting one of those fittings inline and grounding the lug to a ground rod separate from your electric system's ground conductor.
clear line of sight to/from what?
What is the layout of the 4 buildings?
A rough drawing would work. Doesn't need to be anything fancy.
Have you walked around the area with a laptop running NetStumbler to see what other nearby wireless networks might interfere with your plans?
Here are some antennae and cables to consider...
24 dBi - http://www.hyperlinktech.c
Cables - http://www.hyperlinktech.c
Linksys uses RP-TNC; D-Link uses RP-SMA (not all models of either brand have detachable antennae); et cetera.
24 dBi - http://www.wifi-link.com/p
Cables - N-male to N-male - http://www.wifi-link.com/p
RP-TNC - http://www.wifi-link.com/p
RP-SMA - http://www.wifi-link.com/p
Either of those are rated up to 10km, so 500m should be no problem.
How many of those (and APs to use as bridges) you need depends on how the buildings are arranged.
Each antenna should be mounted at least 20 feet off the ground to provide 'fresnel zone' clearance, so the N-male to N-male cables will need to be long enough to reach the ground potential equalizers (despite what it says on the page, they are NOT lightning arrestors... there is nothing that will save your antenna or AP from a direct lightning strike!) - http://www.wifi-link.com/p