13-09-2017, 11:19 AM
GSM is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second generation digital cellular networks used by mobile devices, such as mobile phones, which was first deployed in Finland in December 1991 "Since 2014, it has become the global standard for mobile communications - with more than 90% market share, operating in more than 219 countries and territories.
2G networks developed as a replacement for first generation analog cellular networks (1G), and the GSM standard originally described as a circuit-switched digital network optimized for full duplex voice telephony. This was extended over time to include data communications, first by circuit-switched transport, and then by packet data transport through General Packet Radio Services (GPRS) and EDGE (Enhanced Data rates for GSM Evolution , or EGPRS).
Subsequently, 3GPP developed third generation (3G) UMTS standards, followed by fourth generation (4G) LTE Advanced standards, which are not part of the ETSI GSM standard. "GSM" is a trademark owned by the GSM Association. You can also refer to the most common (initially) voice codec used, Full Rate.
2G networks developed as a replacement for first generation analog cellular networks (1G), and the GSM standard originally described as a circuit-switched digital network optimized for full duplex voice telephony. This was extended over time to include data communications, first by circuit-switched transport, and then by packet data transport through General Packet Radio Services (GPRS) and EDGE (Enhanced Data rates for GSM Evolution , or EGPRS).
Subsequently, 3GPP developed third generation (3G) UMTS standards, followed by fourth generation (4G) LTE Advanced standards, which are not part of the ETSI GSM standard. "GSM" is a trademark owned by the GSM Association. You can also refer to the most common (initially) voice codec used, Full Rate.