I need to network 3 to 6 PC's so that they can 1. Share files, 2. exchange data. 3. Exchange messages (local e-mail). The available interconnection medium is standard phone line. I wish to use standard modems. In effect, I'm looking for a "network in a box," similar to LANtastic(tm) but for longer distance (albeit slower) interconnection.
In the message before this edit I said 20nm. That's NM (nautical miles) for those of you who really thought I meant nanometers.... :-)