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.
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