Question: In a Cell Broadcast Service (CBS) architecture, what is the capability of an MME regarding its interface with Cell Broadcast Centers (CBCs)?
Option 1: An MME can only interface with one CBC at a time.
Option 2: An MME cannot interface with a CBC directly; it must go through an RNC.
Option 3: An MME's interface is limited to eNodeBs, not CBCs.
Option 4: An MME is allowed to have SCTP transport associations established with one or multiple CBCs.
Explanation: This highlights the flexibility and scalability of the MME in handling Cell Broadcast Services. By allowing connections to multiple CBCs, an MME can efficiently manage broadcast messages across different areas or cells, enhancing the overall performance of the CBS. This capability is crucial for effective emergency alerts and public warning systems, among other applications.