Wooden buildings can be penetrated. The fresnel zone is a conical shaped area extending out from an antenna in the direction the signal is traveling. Think of it as a megaphone. The fresnel zone for antennas one mile apart, has a radius of 27' in the middle where the two cones are as large as they get. We have one application running at 5 miles, where the zone is significantly blocked by trees, but manages to keep a low level signal.
Amplifiers are in the process of being tested and approved.
They can significantly improve signal quality, but line of sight is still required. The computer needs an Ethernet card and a Cat-5 Ethernet cable to connect to the radio. The end users system is configured as if it was using a direct ethernet connection to a LAN with Internet access. Any standard 10BaseT ethernet card will work fine. There is a single client radio and a 4-client radio, having one and four Ethernet ports respectively.