Question: What happens to Call Waiting supplementary service functionality in the CS (Circuit Switched) domain when a User undergoes Voice Call Continuity (VCC)?
Option 1: It is automatically disabled to prevent conflicts with IMS services.
Option 2: Its functionality remains unaffected by the user's ability to undergo VCC.
Option 3: It is only available if the call originates from the IMS domain.
Option 4: The service is temporarily suspended during the VCC process.
Explanation: This is because undergoing Voice Call Continuity (VCC) does not inherently impact the functionality of supplementary services like Call Waiting within the CS domain. The continuity of receiving call waiting notifications would be a concern if the call were continued in the IMS, but this does not affect the CS domain's handling of the service.