I appreciate Jack Unger's sending out the TDWR announcement on the announcement list, a portion of which I have copied below.
We run a Muni mesh for a city that actually includes part of Atlanta airport property. It has a TDWR. As part of their network, the City installed some 5.4 links. We don't maintain or own those links, instead they are operated by their Cisco VAR. I sent the VAR the "What You Can Do" section below and they are changing frequency on one of the links as a result. I'm not sure where they actually sit- frequency wise but they are changing. I expect that they will also register the stations. They are also checking all their other 5.4 links in other areas. Additionally, our backhaul partner has also registered the link that brings us part of our bandwidth. Although Atlanta was not one of the problem areas, I'm sure any interference would have been very severe. I hope everyone else also gets proactive on this. It might even become the thing that spurs on a volunteer coordination effort on a larger scale. Ralph N4NEQ ================================= What You Can Do If you have base stations operating near a major metropolitan area and especially if you are located in one of the problem areas, it is important that you go to the WISPA/Spectrum Bridge database lookup page http://spectrumbridge.com/udia/search.aspx, type in the location of your base station(s) and determine if you are within 35 km (or line-of-sight distance) of a TDWR site. If so, please make a note of the TDWR frequency and exclude that frequency from use by your base stations. Further, consider registering your base stations in the TDWR database. Registration benefits you because when FCC enforcement teams visit your area to track down interference sources, they will see that you are operating lawfully, clear of the TDWR frequency. They will have no need to pay you a visit.
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