Question: In a system with two Secondary Common Control Physical Channels (SCCPCHs), where the first SCCPCH carries the Paging Channel, what is the primary purpose of the second SCCPCH that handles both Interactive/Background 32 kbps PS RAB and Signaling Radio Bearers on control channels?
Option 1: To exclusively carry SRBs for CCCH/DCCH/BCCH.
Option 2: To solely support Interactive/Background 32 kbps PS RAB.
Option 3: To carry both PCH and FACH for all services.
Option 4: To multiplex FACH for Interactive/Background 32 kbps PS RAB with SRBs on CCCH/DCCH/BCCH.
Explanation: The second SCCPCH is designed to efficiently manage both types of traffic by combining the Forward Access Channel (FACH) for Interactive/Background 32 kbps Packet Switched Radio Access Bearer with Signaling Radio Bearers on Common, Dedicated, and Broadcast Control Channels, optimizing resource utilization.