Ricochet Modems == Wireless LAN?
dpease writes: "Metricom, purveyor of Ricochet wireless networking, died today. I understand that, sans infrastructure, a Ricochet wireless modem can call another Ricochet modem, and that modem-to-modem range is nearly a mile. Is the hardware this company leaves behind a viable solution for a really cool, really cheap wireless LAN?"
From what I've read and *seen*, these work much like landline modems. They even accept AT commands! Just tell one to "dial" the serial number of another one. If it's within, say, a mile of yours, a "ring" will happen on the other end. Of course, to prevent breakins, just have the recieving device set up with authentication. Just like you would running a dial-up server at home.
I believe I also read that these modems encrypt data locally, and transmit on a given frequency for only a very short burst at a time. (This allows them to avoid hefty FCC charges!) If you've got concerns about eavesdropping, then add your own encryption before data is sent.
I'm sure someone can elaborate... but I believe that it basically said it will work with the older 28.8 modems, but not the new 128 capable ones.
Here is a schematic for a 6 watt, 900 MHz bi-directional wireless data amplifier this would be perfect for old Ricochet hardware. All the parts are quite easy to find also.