Question: When an Interworking Function (IWF) sends a Floor Request message to the MCPTT floor control server for a broadcast group call, what additional field must the message include?
Option 1: User ID field with the IWF's own MCPTT ID
Option 2: Floor Priority field with the highest negotiable priority
Option 3: Floor Indicator field indicating the relevant call type (e.g., broadcast group call)
Option 4: Media Type field specifying the type of media to be sent
Explanation: According to MCPTT interworking specifications, when the IWF sends a Floor Request for specific call types such as a broadcast group call, it is required to include a Floor Indicator field in the message. This field indicates the relevant call type to the MCPTT floor control server, ensuring proper handling and prioritization of the request within the MCPTT system.