Skipping POTS: A 50-Watt Cellular Network In India | MIT Tech Review - http://www.technologyreview.com/communi...
"One such station--dubbed a "village station"--can handle hundreds of users. Groups of such village stations feed signals to a required larger VNL base station within five kilometers. In turn that larger station, which is also solar-powered, relays signals to the main network. The village station can turn a profit even if customers spend on average only $2 a month on the service, instead of the $6 required to make traditional systems cost-effective, the company says." - Kurt Starnes