Question: In an IMS environment with ICS capabilities, what is a prerequisite for the Access Transfer of real-time media from CS to PS for UEs, in conjunction with zero or more non-real-time media flows in PS to PS direction?
Option 1: The UE must be in idle mode and have an active PDP context.
Option 2: The flow requires the Sd reference point for IMS session control over CS media.
Option 3: A static IP address must be assigned to the UE before initiating the transfer.
Option 4: The user must be in an active or inactive IMS originating or terminating session, utilizing the Gm reference point for ICS.
Explanation: This is correct because, as per the specified behavior for Access Transfer in such scenarios, the process mandates that the user's device is engaged in either an active or inactive state within an IMS session (originating or terminating). Moreover, leveraging the Gm reference point is essential for controlling IMS sessions that utilize CS media when ICS capabilities are involved. This setup ensures seamless and controlled transfer of media types between different network access technologies.