Can You Run an Open GSM Network?
OpenCell asks: "Here in Vancouver, cellphone companies are charging ridiculous amounts for basic cellphone plans. I'm wondering if it's possible to run an open/almost free GSM network on a small college campus. Assuming we could find the hardware and get the rights, is there open source software out there to handle most aspects for something like this?"
The GSM spec allows for a type of cell called a pico-cell. Pico-cells are very low power and allow your cell phone to act like a cordless phone, and route calls throught your landline. Never seen one in north america, but I think Nokia offers it in Europe. Problem is different frequencies and I think it needs an ISDN connection.
Actually, if you have a large enough number of properly-designed APs blanketing the area, VoIP might be what you want. I can confirm that Skype works seamlessly both from an actual laptop (of course) and a Windows Mobile device.
In fact, my school is transitioning to VoIP everywhere, for both (non-emergency) landlines and Institute-issued wireless phones.