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gsm

init. grams per square metre, (unit for measuring the weight of paper)

Wikipedia
GSM

GSM (Global System for Mobile Communications, originally Groupe Sp├ęcialMobile), is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile phones, first deployed in Finland in July 1991. it has become the default global standard for mobile communications - with over 90% market share, operating in over 219 countries and territories.

2G networks developed as a replacement for first generation ( 1G) analog cellular networks, and the GSM standard originally described a digital, circuit-switched network optimized for full duplex voice telephony. This expanded over time to include data communications, first by circuit-switched transport, then by packet data transport via GPRS (General Packet Radio Services) and EDGE (Enhanced Data rates for GSM Evolution or EGPRS).

Subsequently, the 3GPP developed third-generation ( 3G) UMTS standards followed by fourth-generation ( 4G) LTE Advanced standards, which do not form part of the ETSI GSM standard.

"GSM" is a trademark owned by the GSM Association. It may also refer to the (initially) most common voice codec used, Full Rate.

GSM (disambiguation)

GSM is a European standard for mobile phones.

GSM may also refer to: