Question: What is the primary purpose of the Session Transfer Number for Single Radio Voice Call Continuity (STN-SR) in a telecom network?
Option 1: To facilitate direct communication between two User Equipment (UE) devices without network intervention.
Option 2: To enable the MSC Server to request session transfer of the media path from the Packet Switched (PS) domain to the Circuit Switched (CS) domain.
Option 3: To manage numbering and addressing for international roaming services.
Option 4: To enhance security protocols for voice calls over IP networks.
Explanation: The STN-SR's primary role is facilitating seamless handovers of voice calls from a packet-switched (PS) network to a circuit-switched (CS) network, ensuring continuity during single radio voice call scenarios, crucial for maintaining service quality and user experience in heterogeneous network environments.