Select an Announcement Service
Use the Select an Announcement Service dialog box to select an Announcement service that will handle incoming calls to a range of unassigned numbers.
In the search box, type all or part of the name of the Announcement service that you want to use. To return all available Announcement services, leave the search box empty and click the search icon.
In the list of Announcement services returned by the search, select the service you want to use to handle incoming calls to the range of unassigned numbers.