The digital cellular technology revolution started with the introduction of
GSM (Groupe Special Mobile) in the late 1980s. The GSM technology was
based on time-division multiple access (TDMA) and was capable of supporting
data services of up to 9.6 kbps. In the early 1990s, IS-95, a standard based
on code-division multiple-access (CDMA) technology was introduced. This
offered data rates of up to 14.4 kbps and improve.
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