The open GSM future arrives (The H)

The H creates
a standalone mobile telephone network
using the sysmoBTS base station. "In previous articles, we've looked at the question of how free are the phones that people use every day, and looked at the theory behind building your own GSM phone network using open source software. Now, in this article we take a look at the sysmoBTS, a small form-factor GSM Base Transceiver Station (BTS) built around these principles and the steps required to configure it to provide a standalone mobile telephone network that is useful for research, development and testing purposes."