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GPRS core network
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====GSM/EDGE specific SGSN functions==== [[Enhanced Data Rates for GSM Evolution]] (EDGE) specific SGSN functions and characteristics are: * Maximum data rate of approx. 60 kbit/s (150 kbit/s for EDGE) per subscriber * Connect via [[Frame Relay]] or IP to the [[Base Station Subsystem#Packet control unit|packet control unit]] using the Gb protocol stack * Accept uplink data to form IP packets * Encrypt downlink data, decrypt uplink data * Carry out mobility management to the level of a [[radio cell|cell]] for connected mode mobiles
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