It should be understood that the plot in Figure B shows a maximum theoretical capacity and that no allowance for imperfection or margin for variation has been included. Therefore any real system can only approach these results.

For example, common DSL modems use only a few MHz of spectrum but considerably more than 1 milliwatt of signal power. These differences along with modem imperfections and allowance for line variations may provide typical performance at 3000 feet (914 meters) of a few Mbps rather than something closer to the approximately ~30 Mbps, as shown on the plot.

Glenn Elmore has over 30 years experience in communications and electronics design. During this time he has developed a world-class expertise in analog and microwave design, measurement, antennas and propagation. His 28 year tenure with HP/Agilent prior to founding Corridor Systems has included various engineering roles in the R&D Lab developing advanced RF and microwave products from 0.05-50GHz. In addition, Glenn has been an active leader in the amateur radio and communications communities, authoring over a dozen articles and achieving several firsts including a low-cost 1Mbps wide area fixed-wireless microwave packet network in 1989. Glenn holds patent #US Patent #4641086 for his work at HP as well as the multiple issued patents pending for the Corridor technology. For more information about Corridor Systems, visit http://www.corridor.biz.