Question: When a UE is connected to multiple domains supporting non-emergency calls with the requested media, how should it attempt an emergency call, assuming no serving network policy applies?
Option 1: The UE shall attempt the emergency call on the same domain it would use for a non-emergency call with the same media.
Option 2: The UE must alternate between domains for each subsequent emergency call attempt.
Option 3: The UE should first attempt the emergency call on the domain with the strongest signal strength.
Option 4: The UE is required to simultaneously attempt the emergency call on all supported domains.
Explanation: This aligns with the principle that, in the absence of a serving network policy dictating otherwise, a UE should utilize the same domain for emergency calls as it would for non-emergency calls when multiple domains are viable. This ensures consistency in call handling and leverages the UE's existing connection preferences, unless overridden by regulatory or operator requirements.