Question: In IMS Service Continuity for UE-initiated multimedia sessions, what is the primary role of the Service Centralization and Continuity (SCC) Application Server (AS) in the home IMS network?
Option 1: To act as a transit node for routing sessions to other Application Servers
Option 2: To utilize 3rd party call control to initiate sessions to remote parties on behalf of subscribers
Option 3: To terminate sessions from remote parties before forwarding to the subscriber's UE
Option 4: To manage subscriber profiles without interfering with session establishment
Explanation: The SCC AS's key function in enabling IMS Service Continuity is using 3rd party call control to initiate sessions to remote parties on the subscriber's behalf, ensuring continuity of service and an uninterrupted user experience across different access networks or during handovers.