I have two Air-Bridges 1.8 miles which when the two bridges was lined up and these are the best values obtained after several tests
BR-1410A (root) BR-1410A (non-root)
-58 dbi -60dbi
54 M 54 M
Ver IOS 12.4 (24D)JA2
The channel is the best in the middle with less than 30% of saturation
Tests were made with the wireless link using a tool Solar wins (wan-killer) to pass a traffic AIR-bridge to the other and had a favorable desempño as 22 megs, but when put in the wireless enlance produccione this began to problems generate 12 megawatts, causing slow users, IP calls cut.
Network traffic from one point to another not exceed the 10 Megas