Network Applications

The following are typical applications of multistage routing:

• An operator might need to query an ENUM server for a destination number. Based on the NAPTR result of the ENUM query, the Oracle® Enterprise Session Border Controller performs a local policy lookup to decide how to route the request, perhaps based on a LRT table lookup.
• An operator might need to query one ENUM server for a number portability lookup, then based on the routing number perform a second ENUM query to a different server to learn which carrier to use for the routing number. Then, then based on the identified carrier perform a LRT lookup for what next-hop(s) to use for that carrier.
• An operator might query an LRT table to confirm the allowed source number. Then, based on the result, query an ENUM server for destination routing.