Question: Upon recovery from a failure, what information can an IMS Access Gateway (IMS-AGW) indicate to its known IMS Application Level Gateways (IMS-ALGs) during registration or restoration procedures?
Option 1: Whether the Service has been restored, and/or if it has restarted with a cold or warm boot.
Option 2: Only if the Service has been fully restored.
Option 3: Just that it has completed a restart, without specifying the type of boot.
Option 4: None of the above; this information is not communicated during these procedures.
Explanation: This option is correct because, when an IMS-AGW recovers from a failure, undergoes maintenance unlocking, or is restarted, it can signal detailed restart information (cold or warm boot) or service restoration status to its associated IMS-ALGs, enabling informed decision-making at the IMS-ALG level.