Question: Upon receiving a floor request in an MCPTT call with only one media endpoint, how does the IWF floor control server respond, and what specific detail is included in the response?
Option 1: The server grants the floor request, and the Floor Grant message includes a default <Reject Phrase> value.
Option 2: The server rejects the floor request, and the Floor Deny message includes Reject Cause value A (Only one participant) without any additional text string.
Option 3: The server rejects the floor request, and the Floor Deny message includes Reject Cause value A (Only one participant) with an optional additional text string explaining the reason.
Option 4: The server neither grants nor rejects the floor request but instead requests more information from the MCPTT floor participant.
Explanation: According to the specified behavior for handling floor requests in MCPTT calls, if there is only one media endpoint in the call, the IWF floor control server shall reject the request. The rejection is communicated via a Floor Deny message, which must include Reject Cause value A (Only one participant). Additionally, the server may also choose to provide further clarity on the rejection reason by including an optional <Reject Phrase> value with an explanatory text string, aligning with the detailed protocol for handling such scenarios in mission-critical communications.