(Base transceiver station (BTS

  A BTS acts as the interface between MS’s and the network, by providing radio *

coverage functions from their antennae to provide the coverage area for one 

cell

 Converts the GSM radio signals into a format that can be recognized by the BSC* 

  Ciphering using the ciphering key* 

  Channel coding and interleaving* 

  Modulation and demodulation* 

 Records and passes to the BSC the Signal strength measurements*