Question: In IMS Service Continuity, what triggers the MSC Server to decide not to proceed with Single Radio Voice Call Continuity (SRVCC) for an ongoing session?
Option 1: Insufficient network resources in the target RAN
Option 2: The call being in a state (e.g., Pre-Alerting or Alerting) where SRVCC is not supported by IMS
Option 3: User Equipment (UE) lack of support for SRVCC
Option 4: Ongoing Handover procedure to a non-SRVCC capable cell
Explanation: This is because the MSC Server's decision to proceed or not with SRVCC is influenced by the call state (e.g., Pre-Alerting or Alerting) as indicated by IMS, where SRVCC may not be feasible due to the specific stage of the call, thus preventing unsuccessful SRVCC attempts.