Question: What is the primary purpose of the 'Additional Modified E-DCH FDD Information Response' in UTRAN's Iur interface RNSAP signalling?
Option 1: To initiate a new Radio Link (RL) setup on the primary Downlink (DL) frequency.
Option 2: To provide updated information for RLs on the secondary Uplink (UL) frequency after a reconfiguration procedure.
Option 3: To request UE Context configuration details from the RNC for all active RLs.
Option 4: To confirm the successful release of an E-DCH FDD connection for a specific UE.
Explanation: The correct answer aligns with the context, indicating this response provides updated information for Radio Links (RLs) on the secondary Uplink (UL) frequency after reconfiguration, crucial for maintaining seamless communication. The other options do not accurately reflect the purpose.