GSM is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe protocols for second generation (2G) digital cellular networks used by mobile phones.It is an open, digital
cellular technology used for transmitting mobile voice and data
services."GSM" is a trademark owned by the GSM Association.
GSM supports voice calls and data transfer speeds of up to 9.6 kbps,
together with the transmission of SMS (Short Message Service).
Here is an presentation I've prepared abot GSM.
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