Copyright 2002 by
Prentice Hall, Inc.
6-16
n Technologies:
n1G, first generation cell phones used analog technology and circuit switching
n2G, second generation cell phones use
nDigital technology and circuit switching 
nCarry data and messages using short messaging service (SMS)
n2.5G Upcoming, will extend 2G digital technologies (GSM, CDMA and TDMA)
n3G Upcoming, will provide WANs for PCs and multimedia
Wireless is the Next Frontier: Wireless Long Distance