Question: Upon receiving an implicit floor request due to an upgrade to an emergency group call in an MCPTT scenario, what action does the IWF floor control server take regarding timers T1 and T20?
Option 1: Starts timer T1 (End of RTP media) and resets timer T20 (Floor Granted)
Option 2: Stops timer T1 (End of RTP media) but keeps timer T20 (Floor Granted) running
Option 3: Stops both timer T1 (End of RTP media) and timer T20 (Floor Granted), if running
Option 4: Resets both timer T1 (End of RTP media) and timer T20 (Floor Granted) without stopping them
Explanation: In the context of MCPTT, when an implicit floor request is triggered by an upgrade to an emergency group call, the IWF floor control server's immediate response involves managing ongoing timers to prioritize the emergency communication. Stopping both timer T1 (related to the end of RTP media) and timer T20 (associated with Floor Granted) ensures that the emergency call takes precedence over any existing media transmissions or floor grants, thereby aligning with the priority handling required in emergency situations.