A: It turns out that there is a greater perception of interference problems than actual interference problems! The management probably have more experience than anyone in Canada in the deployment of reliable fixed wireless systems in unlicensed frequency bands over the past 8 years. The first issue is that the system must be well designed, with directional antennas and frequency channel selection: any fixed wireless system that is poorly designed, licensed or unlicensed, will be unreliable. The second issue is that most cases of interference in unlicensed bands have occurred at the densely populated lower ISM frequencies: 900MHz, where there is less path attenuation and directional antennas more difficult to deploy because they are much larger. Our staff have not experienced any interference problems in the 2.4 GHz ISM bands due to Frequency Hopping technology incorporated in the wireless systems that we deploy. Additionally, there is a DOC requirement that unlicensed equipment must not cause interference to any other systems. In practice this means that there is a huge advantage to the first user in deploying his system. And typically, the new user would experience reverse interference himself when he installed a system causing interference to an existing user. So, the new user would not be able to successfully install his system and this would lead to the parties working out a mutually cooperative solution. Finally, as far as we are concerned, the roll-out of this type of service first to rural locations in Ontario removes the possibility of a dominant near-end interferer into the base station, and similar care should achieve the same result at the end-user's location. | 
