Multiple DNS Zone Support

For smaller deployments, one can assume a single DNS zone within which all applicable UEs reside. Large deployments, however, may use multiple DNS zones, allowing the network administrator to segregate and more easily manage large numbers of UEs.

When the Oracle Communications Unified Session Manager encodes the user part, it performs a modulo 1000 operation on a 24-bit checksum of the user part and appends the resulting 3 digits to the encoded user part. You can configure your DNS zones for these digits to organize users into zones.

For example, encoding the user part acme_user gives the string acmeX5Fuser.2.7.7. Assuming a domain of acme-ims.com, the ENUM entry for this user would be acmeX5Fuser.2.7.7.acme-ims.com. Applicable zone configuration can use the .2.7.7 portion of this string to determine this user’s zone.