I lifted the link 4.5 kilometers on two TP-Link WA5210G access points (2.4 GHz WiFi b or g modes, i.e. 11 or 54 Mbps).
One is installed in a 10-story building on the wall between the roof and the top floor, the second in the private sector on a mast about 15 meters from the ground. There is another client with the TP-Link-WN7200ND adapter in the room near the window, but it is about 450 meters away.
SSID broadcasting is disabled so as not to advertise network availability. The speed is stable 11-25 Mbps. The equipment is powered by the same cable as the data (POE technology).
We experienced autumn and winter perfectly, they worked even in the most cracking frost. There were no glitches and spontaneous reboots.
There were minor tuning problems, the decision to manually select a channel helped.
The main thing that made me choose this equipment was its affordable price (about 2000 rubles per unit) compared to nanostation.
P.S.
If you have questions regarding the construction or operation of this network, I will be happy to help with an answer.
Post has been editedaltoris - 04.04.13, 11:34