2+2+2
1 sector 2 TRX = 2*8 timeslots = 1 BCCH + 1 SDCCH + 14 TCH
–> 14 simultaneous calls + 8 simultaneous call setups
2+2+2 –> 42 simultaneous calls + 24 simulatenous call setups.
“1 call setup” is a procedure to seize a TCH, it lasts about 4 seconds.