Question: In a scenario where a Voice Call Continuity (VCC) attempt would result in a call being barred in the target domain/system due to All Call Barrings, what determines the outcome for the call?
Option 1: The policy of the serving network at the time of VCC initiation
Option 2: The configuration of the User Equipment (UE) handling the call
Option 3: The automatic failover protocol to a designated backup system
Option 4: The home operator's policy regarding such scenarios
Explanation: According to telecom principles for handling calls across different domains/systems, especially in cases involving Voice Call Continuity (VCC) and call barring services, the home operator typically retains control over subscriber services. Thus, their policy would dictate how to handle a call that would be barred after transitioning to a new domain/system, ensuring consistent application of their service rules for subscribers.