Question: In a 3GPP-defined system with three Secondary Common Control Physical Channels (SCCPCHs) for FDD, what is primarily carried on the second SCCPCH?
Option 1: Paging Channel (PCH) and Signaling Radio Bearer (SRB) for CCCH/BCCH
Option 2: Dedicated Channel (DCH) for Interactive 32 kbps PS RAB
Option 3: Forward Access Channel (FACH) for Cell Broadcast Service (CTCH) and SRBs for CCCH/BCCH for idle mode UEs
Option 4: Random Access Channel (RACH) for Initial Access
Explanation: The second SCCPCH is utilized to carry the Forward Access Channel (FACH), supporting Cell Broadcast Service via CTCH, and Signaling Radio Bearers for CCCH/BCCH, catering to idle mode UEs. This setup highlights efficient resource allocation, dedicating a SCCPCH to broadcast and common control functions for idle UEs, optimizing network resources.