Question: What information does a Supplementary Service invocation notification (SS-CSI) typically contain to notify the GSM Service Control Function (gsmSCF) about a subscriber's Supplementary service invocation?
Option 1: Only the gsmSCF address (E.164 number) and CSI state
Option 2: A notification criterion (list of Supplementary Services), gsmSCF address (E.164 number), CSI state, and a notification flag
Option 3: Subscriber's IMSI, Supplementary Service codes (e.g., ECT, CD, MPTY, CCBS), and current network location
Option 4: Supplementary Service invocation timestamp, gsmSCF address, and subscriber's language preference
Explanation: The correct answer is Option 2 because the data typically includes a criterion for when to notify (a list of specific Supplementary Services), the gsmSCF address (in E.164 format), the current CSI state, and whether changes trigger further notifications about subscriber data changes, ensuring the gsmSCF is adequately informed about a subscriber's Supplementary service invocations as per their settings.