OpenBTS and Asterisk allow enthusiasts to deploy homebrew yet Commercial Grade GSM cellular networks with affordable Open Hardware such as the Range Networks SDR. We’ll cover the hardware and software required to make your own cellular network and demonstrate the Range Networks SDR and OpenBTS at work.
The first generation of telephones were off-grid, using local batteries and crank generators. The MAG*NET project at Saint Joseph's College developed a method of allowing historic telephones to be used, without modification, to operate on the modern telephone network. Asterisk, openWRT and heyu are Open Source tools under the hood.