Question: What happens if none of the media requested by the User Equipment (UE) is successfully established during an IMS Multimedia Emergency Service (IMS MES) call?
Option 1: The network will attempt to establish a voice-only connection with the Public Safety Answering Point (PSAP).
Option 2: The IMS MES will fail, and an IMS MES failure indication will be provided to the UE.
Option 3: The network will redirect the call to a non-emergency service number for assistance.
Option 4: The UE will automatically retry the request with reduced media capabilities.
Explanation: This is because, as per originating network requirements for IMS MES, if none of the media requested by the UE is successfully established, the IMS MES will fail, and the network must inform the UE of this failure. This ensures the user is aware that the emergency service request was not successfully processed.