Source URI Information in ENUM Requests

ENUM queries can be configured to include the source URI which caused the ENUM request by enabling the include source info parameter. The Oracle® Enterprise Session Border Controller can add the P-Asserted-ID URI (only if not in an INVITE) or the From URI into an OPT-RR Additional Record to be sent to the ENUM server. It can be useful to specify the originating SIP or TEL URI from a SIP request which triggered the ENUM query, so the ENUM server can provide a customized response based on the caller.

This feature implements the functionality described in the Internet Draft, DNS Extension for ENUM Source-URI, draft-kaplan-enum-source-uri-00.

When a P-Asserted-ID is blocked or removed before the ENUM query is made, the Oracle® Enterprise Session Border Controller only sends the URI in the From header.

Note that to support this feature, according to the Internet draft, ENUM clients must support 1220 bytes in UDP responses. Therefore, if this feature is enabled, and the max response size parameter is not set i.e., with a 512 byte default, the Oracle® Enterprise Session Border Controller will set the size to 1200 on the OPT-RR records sent.