FOSS in the Mobile World
GSM Base Transceiver Station
BTS
As the name indicates "transceiver"
Handles
Layer 1 and some parts of RF layer2
Modulation/Demodulation
Time Multiplex, scheduling of frames
Is not a "Base Station", i.e. not self-contained
True 'slave' to the BSC
personal git repositories of Harald Welte. Your mileage may vary