Question: Upon receiving an MCPTT (Mission Critical Push To Talk) call release step 2 request, what actions does the IWF (Interworking Function) floor control server take towards the MCPTT client?
Option 1: It only notifies the MCPTT client of the impending call release without altering its internal state.
Option 2: It requests the network media interface to release all associated resources and terminates the 'basic floor control operation' state machine for that participant.
Option 3: It enters a 'Standby' state and waits for further instructions from the signalling plane before taking any action.
Option 4: It immediately releases all system-wide resources, regardless of their association with the specific MCPTT call or client.
Explanation: This is correct because, according to the protocol for handling an MCPTT call release, the IWF floor control server must both release network resources tied to the client for that call (ensuring efficient resource management) and adjust its operational state regarding floor control for the participant (terminating the 'basic floor control operation' state machine). This dual action ensures a clean release of the call from both a resource allocation and a state management perspective.