Question: In an MCPTT (Mission Critical Push To Talk) scenario with an Interworking Function (IWF) and Land Mobile Radio (LMR) systems, what is the primary focus regarding initial setup procedures?
Option 1: Procedures for IWF switching from a controlling to a non-controlling role in ongoing MCPTT calls.
Option 2: Configuration settings for LMR systems to ensure compatibility with MCPTT networks.
Option 3: Initial procedures for establishing a new SIP session for group or private sessions with floor control in MCPTT.
Option 4: Error handling mechanisms for failed MCPTT call initializations involving IWF and LMR.
Explanation: This focuses on the initial setup of SIP sessions for group or private communications that include floor control, a critical aspect of managing mission-critical push-to-talk conversations efficiently.