Global System for Mobile Communications (GSM)

Initiated in 1982, the GSM committee was assigned to the task of specifying a Europe-wide cellular system that overcomes the limitations of the legacy 1G systems. The initial conception by the CEPT was dedicating the new system to the 900 MHz band. Later on, during the further development and international deployment, upon requests by different countries and regions that had joined onboard, GSM was adopted to operating at more frequency bands to be tailored to the various requirements of local networks, as listed in Table 4.1.