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[myphilphone]

hi to everybody, is anybody there can  help me out how to extend my internet using point to point D-link router
The distance from A to B is about 24 kms. but no obstruction it is an island so both A and b are facing to each other , is anybody knows what is the best D-link router model and antenna type should i use, thanks for the help in advance falks.


myphilphone

[bjrichus]

There is a great item on the curvature of the earth at:

http://mathcentral.uregina.ca/QQ/database/QQ.09.02/shirley3.html

So assuming you do have true line of sight, you might get a signal using some kind of directional antenna.


Check out these guys:

http://www.radiolabs.com/Articles/wifi-antenna.html


You can see what the range is likely to be here (but you'll need to know all the numbers i.e. power) first:

http://www.radiolabs.com/stations/wifi_calc.html


They suggest "The 2.4 GHz flat-land record was set with a Grid in Australia last year. They sent 200 mW of power 56 km from grid to grid" for this antenna ($125), which implies without additional amplification, at 24km you might be getting real close to the limits of what might be considered usable operation, as getting some kind of signal isn't the same as getting enough for usable bandwidth on the resulting LAN interface.

Lets face it, "World Records" and daily operation are two different things now, aren't they (or else we'd all be doing it)?

http://www.radiolabs.com/products/antennas/2.4gig/2.4grid.php


Let us know how you get on, will you?