GSM is the second generation after the AMPS, GSM was first issued in 1991 and began developing in 1993 with the adoption by some countries such as South Africa, Australia, Middle East, and North America. GSM's growth was due to the use of a digital system so that mengekploitasi allows for the development and use of algorithms and allows the use of digital Very Large Scale Intergration (VLSI). To reduce the cost and handled terminalnya, at the time this was to use GSM features Intelegent Network (network intellect). GSM is a mobile telecommunications system using a digital cellular system.
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