Question: What is the primary purpose of the paging procedure in the Evolved Packet System (EPS)?
Option 1: To prompt the UE to detach from the network.
Option 2: To request the establishment or resumption of a NAS signalling connection to the UE and to initiate mobile terminating CS fallback procedure, SMS, or user data transfer via the MME.
Option 3: To inform the UE about network congestion.
Option 4: To notify the UE about an incoming voice call.
Explanation: The paging procedure is used by the network to request the establishment or resumption of a NAS signalling connection to the UE, and also to initiate mobile terminating CS fallback procedure, SMS, or user data transfer via the MME. This highlights the role of the paging procedure in managing UE connections and facilitating communication services in EPS networks.