Overview 1. INTRODUCTION TO GSM 2. GSM ARCHITECTURE 3. GEOGRAPHICAL NETWORK ORGANIZATION 4. GSM NUMBERING 5. GSM CALLING (MOC, MTC) Geographical network organization MSC region •The International GSM/DCS system area comprises all countries where PLMN is implemented •Within these countries, the PLMN are further subdivided into MSC areas Location area (LA) •The MSC service areas, in turn, consists of cells which are organized as Location Areas (LA) •Allows MS to move freely without updating location information •System uses LA’s to locate a MS using broadcast messages. . INTRODUCTION TO GSM 2. GSM ARCHITECTURE 3. GEOGRAPHICAL NETWORK ORGANIZATION 4. GSM NUMBERING 5. GSM CALLING (MOC, MTC) Geographical network organization MSC region •The International GSM/ DCS system