Second-generation cellular systems are based on digital communications technology. The
major motivation for the development of 2G
systems came from the capability of digital communication systems to
provide a wider range of services including voice, facsimile and
data. Data rates up to 9.6 Kbps per radio channel
are typically supported, with some systems allowing channel aggregation to
achieve rates of up to approximately 100 Kbps. Circuit switching
is used to provide all services. A connection must therefore
be established before data is transferred, and that capacity allocated
to a data connection cannot be reused if it is
not used by that connection.
GSM is a second-generation cellular system.
Other topics in our resources on GSM related to 2G include: