Architecture of the GSM system
	n GSM is a PLMN (Public Land Mobile Network) – several providers setup mobile networks following the GSM standard within each country – components n MS (mobile station) n BS (base station) n MSC (mobile switching center) n LR (location register) – subsystems n RSS (radio subsystem): covers all radio aspects n NSS (network and switching subsystem): call forwarding, handover, switching n OSS (operation subsystem): management of the network