Question: In the context of eMLPP (Enhanced Multi-Level Precedence and Preemption) service, what is the primary purpose of the 'Default Priority' parameter during an outgoing call set-up?
Option 1: To override the subscriber's maximum entitled priority level
Option 2: To assign a temporary priority level for emergency services only
Option 3: To indicate the minimum required priority for call completion
Option 4: To define the priority level assigned when no explicit priority is indicated
Explanation: The 'Default Priority' parameter serves as a fallback, ensuring that a call is assigned an appropriate priority level in the absence of an explicitly indicated priority during call set-up. This aligns with efficient network resource allocation and service provision, particularly in scenarios where users do not specify a priority, relying on their predefined service settings.