Chapter 3 : Telecommunication, Satellite and Broadcast Systems: GSM: / Topic : Localization And Calling, Handover, security / Content : Mobile terminated call (MTC), Mobile originated call (MOC), Intra-cell handover , Inter-cell, intra-BSC handover, Inter-BSC, intra-MSC handover, Inter MSC handover, Handover decision depending on receive level, Authentication, Encryption