GSMstandarden

The GSM (Global System for Mobile Communications) standard is a second-generation (2G) digital cellular technology. Developed by the European Telecommunications Standards Institute (ETSI), it was first introduced in 1991. GSM revolutionized mobile communication by moving from analog to digital, offering improved voice quality, security, and efficiency.

GSM operates on several frequency bands, most commonly 900 MHz and 1800 MHz in Europe, and 1900 MHz in North America. It uses a combination of Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA) technologies to allow multiple users to share the same radio frequencies. This division of resources enables a higher capacity of users compared to earlier analog systems.

Key features of GSM include SMS (Short Message Service) for text messaging, which was a significant innovation. It also introduced international roaming capabilities, allowing users to make calls in different countries if their mobile operator had agreements with foreign networks. GSM was also the foundation for later mobile data technologies like GPRS (General Packet Radio Service) and EDGE (Enhanced Data rates for GSM Evolution), which provided basic internet access.

While largely superseded by 3G, 4G, and 5G technologies for high-speed data, GSM networks still remain operational in many parts of the world, primarily for voice calls and basic text messaging, especially in regions where newer infrastructure is less prevalent. Its widespread adoption established a global standard for mobile telephony.