CN - Core Network

This is an evolved GSM Core Network infrastructure or any new UMTS Core Network infrastructure, integrating circuit and packet switched traffic. This may include such functions as the MSC (Mobile Switching Centre), VLR (visitor Location Register), HLR (Home Location Register), SGSN (Serving GPRS Support Node) and GGSN (Gateway GPRS Support Node).


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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