User enabled telephone features, such as Call Forwarding and Send All Calls, will be preserved after a failover to a survivable core server, if the administered features were captured when translations were saved and the translations were distributed to the survivable core server prior to the failover.

When a survivable core server controls a Media Gateway, user enabled telephone features will not be preserved when the system falls back to the main server. The user enabled features cannot be saved to translations on a survivable core server and the main server will have no knowledge of the settings.