Question: Upon expiry of timer T11 (End of RTP dual) in an MCPTT (Mission Critical Push To Talk) system, what action does the IWF floor control server take regarding resource management?
Option 1: Releases all resources reserved in the media plane for the 'dual floor control operation' state machine and associated timers.
Option 2: Allocates additional resources to extend the 'dual floor control operation' state machine duration.
Option 3: Modifies existing resource reservations to prioritize overriding media endpoints.
Option 4: Delays resource reallocation until the next group call initialization.
Explanation: Upon timer T11 expiry, indicating the end of RTP dual transmission, the IWF floor control server must efficiently manage resources. The correct action is to release all reserved resources for the 'dual floor control operation' state machine and its associated timers, ensuring system efficiency and preparing for new operations. This action aligns with practical telecom scenarios where resource management is crucial for maintaining service quality and preventing unnecessary resource occupation.