UG-CSI - USSD General – CAMEL Subscription Information

The UG-CSI is held in the HLR and is not sent to any other node. It contains trigger information which is used to invoke a USSD application in the CSE for all subscribers in the HLR. It is possible that for a particular service code both U-CSI and UG-CSI are applicable.


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

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