6. The system of claim 1 , further comprising a user profile database communicatively coupled with the bus and maintaining records of a set of user preferences for one or more of the end devices of the interface level.
6. The system of claim 1 , further comprising a user profile database communicatively coupled with the bus and maintaining records of a set of user preferences for one or more of the end devices of the interface level. 7. The system of claim 6 , wherein the user profile database provides the preferences to one or more of the end devices or one or more of the managers in response to a common language message received via the bus.