![]() The standard GSM was first developed in 1982 by a committee of Conference Europeenne des Postes et Telecommunications (CEPT) (Recent – European Telecommunications Standard Institute), the European Standard Organization, as a new mobile communications standard in the 900 MHz frequency band. Also Read: What is ZigBee Technology and How it works?.There are about more than three billion users of this technology. Global System for Mobile Communications (GSM) is currently used by about 80% of mobile phones across the worlds. ![]() ![]() It uses the digital air interface wherein the analog signals are converted to digital signals before transmission. In the Europe and Asia, the GSM operates in 900 to 1800 MHz frequency range, whereas in United States and other American countries, it operates in the 850 to 1900 MHz frequency range. The widely-used GSM frequency bands are 900 MHz and 1800 MHz. It initially started as a circuit switching network, but later packet switching was implemented after integration General Packet Radio Service (GPRS) technology as well. ![]() ![]() The GSM standard was developed for setting protocols for second generation (2G) digital cellular networks. GSM or Global System for Mobile Communications is the most popular wireless cellular communication technique, used for public communication.
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