Three generations of mobile systems
1st generation: analogue transmission
AMPS (Advanced Mobile Phone System) in USA
TACS (Total Access Communication Service) in Europe
NMT (Nordic Mobile Telephone), and others
2nd generation: digital transmission
GSM (Global System for Mobile Communications)
ERMES (European Radio Messaging System) - paging
CT2, CT3 (Cordless Telephone Standards)
DCS 1800 (Digital Communication Service)
DECT (Digital European Cordless Telephone)
3rd generation: unification of different technologies
FPLMTS (Future Public Land Mobile Telecommunication System)
UMTS (Universal Mobile Telecommunication System)
IMT-2000 (International Mobile Telecommunication)