Lomby asks: "I am networking a company that has two offices in the same city. Clearly they would like to exchange data between them. Since I live in an internet under-developed country (Switzerland), a permanent cable connection is out of question due to the high costs. The most obvious choice is to connect the two offices via ISDN, but this has the drawback of cost per time unit, and the connection would be estabilished only a few time a day, bringing consistency problems. Now I'm looking at a wireless solution: has anyone tested a wireless system in a metropolitan area (10 km)? Costs? Problems? Field of view? Works with Linux? Do I need to install a huge antenna? "