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I installed the 1400 on the rooftop of Preston Wireless, 0.6 miles from its primary PoP (point of presence), located at the top of a 150-foot grain tower in downtown Green Bay. A voltmeter confirmed an RSSI voltage of 1.38 volts on both ends of the link. Higher voltages are directly proportional to higher receive-signal strength. My initial performance tests yielded poor results, so I used the Web-based configuration GUI to lower the bridge transmit power, which was too high for the range of our initial test.
Using Ganymede Chariot 4.3 and a pair of high performance workstations, I benchmarked the solution at 27.6 Mbps for half-duplex throughput and 30.7 Mbps for full-duplex throughput, near the theoretical maximum data rate for 802.11a based hardware. Ping tests indicated latency of less than 1 millisecond.
I then moved the home office radio to a remote PoP 5.5 miles away and realigned the antennas, measuring an RSSI voltage of 1.19 volts. At 5.5 miles, the 1400 achieved 19.9 Mbps of throughput in unidirectional tests, and 20.6 Mbps in bidirectional tests.
Aironet Specs
The 1400 operates using 802.11a technology in the UNII-3 band (5,725 MHz to 5,825 MHz), providing four 20-MHz wide nonoverlapping channels for use in North America.
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