Enumerated (ENUM) zones are used to provide VoIP functionality within a DNS server.
VoIP service requires DNS to manage the phone numbers associated with client end points. Address Manager provides an e.164 or ENUM zone type for this purpose. The ENUM zone represents the area code for the phone prefixes and numbers stored within it. ENUM zones contain special sub-zones called prefixes that represent telephone exchanges and can contain the records for the actual devices. A URI string is used to provide custom forward locator references for VoIP devices as described in RFC 3401. Reverse DNS is used to discover the relevant information for a device based on its phone number alone. NAPTR records are used to represent this information.
In Address Manager, you manage these settings as ENUM zones that contain numbers, prefixes, deployment options, and deployment roles.