Question: In an MCPTT (Mission Critical Push To Talk) system, as per 3GPP specifications, what is the default state of the 'general floor control operation' state machine when a new instance is initiated and before any input is applied, or when an MCPTT call is released?
Option 1: Idle State
Option 2: Active Floor State
Option 3: Start-stop State
Option 4: Reserved State
Explanation: The 'Start-stop' state is specified as the initial and default state for the 'general floor control operation' state machine in MCPTT systems when a new instance begins, prior to any floor control input, or upon the release of an MCPTT call. This ensures a defined baseline state for managing floor control operations, emphasizing system predictability and reliability in mission-critical communications.