What you're thinking of is called a base station. https://discourse.criticalengineering.org/t/howto-gsm-base-station-with-the-beaglebone-black-debian-gnu-linux

What you're thinking of is called a base station. https://discourse.criticalengineering.org/t/howto-gsm-base-station-with-the-beaglebone-black-debian-gnu-linux-and-a-usrp/56 https://discourse.criticalengineering.org/t/howto-gsm-base-s...