SDP-Based Addressing

SDP-response early media suppression follows the same sequence described for SIP-based addressing with one exception. A provisional response with SDP media can make the Oracle® Enterprise Session Border Controller select a new early-media-allow rule from another realm, based on the addressing inside the responding SDP.

When the SDP-response early media suppression feature is enabled, the Oracle® Enterprise Session Border Controller searches the outbound SIP interface’s realms for a matching address prefix with the connection address in the responding SDP. If it finds a match, it uses the early-media-allow parameter value of that realm until the 200 OK message is received, then bidirectional media is allowed regardless. If the Oracle® Enterprise Session Border Controller does not find a match, it searches all of the global realms for one. If it finds a match, the Oracle® Enterprise Session Border Controller uses that realm’s early-media-allow parameter value. If it does not find a match in the global realm(s), the Oracle® Enterprise Session Border Controller continues to use the previous early-media-allow parameter value.