You can let the Reach Me feature handle all calls in an identical fashion, or define different call handling actions for priority callers and other callers. Priority callers are all the voice messaging users in the internal directory of the Messaging system.
Navigate to the User Preferences > Reach Me page.
Under the Caller Categories section
Select Treat all callers the same if you want to set the same call handling action for all callers.
Select Distinguish between priority callers and other callers to setup different call handling actions for regular callers and priority callers.