VT-IM-CSI - Visited Terminated – IP Multimedia – CAMEL Subscription Information

CAMEL Phase 3 allows the initiation of terminating CAMEL services at the VMSC (Visited Mobile Switching Centre). The VT-CSI if present is passed to the VMSC/VLR during the Update Location procedure. VT-IM-CSI allows for this functionality to be extended to the IMS.


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

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