Question: When an MSC Server receives a Bearer Released procedure from the Media Gateway (MGW), what action does it take regarding radio resources allocated for a call?
Option 1: Immediately releases MGW allocated resources for the access side without further procedures.
Option 2: Initiates call establishment towards the UE to re-allocate new radio resources.
Option 3: Requests modification of the existing bearer on the access side instead of release.
Option 4: Initiates call clearing towards the UE and requests release of the allocated radio resources.
Explanation: Upon receiving a Bearer Released procedure from the MGW, the MSC Server's next step involves terminating the call leg towards the User Equipment (UE) and freeing up the radio resources that were in use. This is crucial for efficient resource management within the telecom network, ensuring that resources are available for new or ongoing communications as needed. Initiating call clearing and requesting the release of allocated radio resources are sequential steps following the bearer release notification, aligning with standard practices for managing circuit-switched core networks.