What is First Geneartion (1G) technology | About First Geneartion (1G) | First Generation Mobile Technology

About First Generation Key Points

• Advanced Mobile Phone Service (AMPS)

1.     US trials 1978; deployed in Japan (’79) & US (’83)   
2. „     TIA-553
3.    800 MHz band — two 20 MHz bands
4. „     Still widely used in US and many parts of the world

•  Nordic Mobile Telephony (NMT)

1.       Sweden, Norway, Demark & Finland
2. „      450 MHz; later at 900 MHz (NMT900)
3.       Launched 1981; now largely retired

•  Total Access Communications System (TACS)

1.   Some TACS-900 systems still in use in Europe
2.  British design; similar to AMPS; deployed 1985