Question: In Lawful Interception (LI) for a conference call, what does the Payload within the Conf-CC-PDU typically contain?
Option 1: Only signaling information for call setup and teardown
Option 2: User-plane packets including the IP layer and above (e.g., IP/UDP/RTP)
Option 3: Encrypted data requiring additional decryption keys for access
Option 4: Metadata about participants, such as phone numbers and locations
Explanation: In the context of Lawful Interception for a conference call, the Payload within the Conf-CC-PDU is designed to carry the actual communication content. This includes user-plane packets, which encompass data from the IP layer upwards, such as IP/UDP/RTP, ensuring that the intercepted data contains the voice or media transmission of the conference call.