The HLR contains GPRS subscription data and
routeing information. The HLR is accessible from the SGSN via the Gr interface
and from the GGSN via the Gc interface. For roaming MSs, the HLR may be in a
different PLMN than the current SGSN.
After long period of thinking I decided to upload my study notes to this blog. "My thoughts and notes on Air now"
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