Question: What is the primary purpose of the Direct Transfer procedure in the UTRAN Iu interface?
Option 1: To interpret and process UE-CN signalling messages within the UTRAN.
Option 2: To carry UE-CN signalling messages over the Iu Interface without interpretation by the UTRAN.
Option 3: To establish connectionless signalling for MM or CC messages between UE and CN.
Option 4: To define the content of MM or CC messages for UE-CN communication.
Explanation: The Direct Transfer procedure is designed to transport UE-CN signalling messages across the Iu Interface without being interpreted by the UTRAN, ensuring message content remains outside RANAP's scope and aligning with other protocol specifications for efficient, non-interpreting transport.