Global System for Mobile Communications

digital cellular communication system used in many countries (based on a variation of TDMA technology), GSM

For other uses, see GSM (disambiguation). Global System for Mobile communications (GSM: originally from Groupe Spécial Mobile) is the most popular standard for mobile phones in the world. Its promoter, the GSM Association, estimates that 82% of the global mobile market uses the standard . GSM is used by over 2 billion people across more than 212 countries and territories. Its ubiquity makes international roaming very common between mobile phone operators, enabling subscribers to use their phones in many parts of the world. GSM differs from its predecessors in that both signaling and speech channels are digital call quality, and so is considered a second generation (2G) mobile phone system. This has also meant that data communication were built into the system using the 3rd Generation Partnership Project (3GPP).
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<communications> (GSM, originally "Groupe de travail Spciale pour les services Mobiles") A standard for digital cellular communications (in the process of being) adopted by over 60 countries. The GSM standard is currently used in the 900 MHz and 1800 MHz bands.
In the USA trial systems akin to the related Digital Cellular System (DCS) 18000 have been set up in several metropolitan areas.
HSCSD is a proposed standard for circuit switched data communications over GSM.
http://www.gsmworld.com/.
[IEEE spectrum August 1999, pp. 26].
[Details? Current status? Whose standard?]
(1999-11-25)