Question: In a held Multi-Party (MPTY) call, what capabilities do remote parties possess compared to an active MPTY call?
Option 1: Remote parties in a held MPTY call have limited operations compared to those in an active MPTY call.
Option 2: The ability of remote parties to perform operations differs based on the served mobile subscriber's connection status.
Option 3: Remote parties can perform the same operations in both held and active Multi-Party calls.
Option 4: Held MPTY calls restrict remote parties from performing any operations until the call is activated.
Explanation: This correct answer reflects the understanding that, according to the specifications for Multi-Party supplementary service, remote parties maintain the same operational capabilities whether the MPTY call is active or on hold. This ensures consistency in user experience and functionality across different states of the call, highlighting the importance of seamless interaction in telecom networks, especially in multi-user communication scenarios.