Question: In a Voice Group Call Service (VGCS) scenario, when a calling subscriber with a non-"normal subscriber" talker priority initiates call termination, what action does the MSC take if the received talker priority mismatches the stored one?
Option 1: The MSC processes the termination request but alerts the network administrator.
Option 2: The MSC discards the termination request message.
Option 3: The MSC temporarily stores the request for further verification before processing.
Option 4: The MSC sends a talker priority update to the mobile station.
Explanation: In VGCS, maintaining call control integrity is crucial. If the talker priority in the termination request doesn't match the stored one, the MSC must ensure the request's legitimacy. Discarding the message prevents potential unauthorized terminations, safeguarding the service's security and operational integrity, aligning with the principle of least privilege and secure network operation.