SDP-Response Early Media Suppression

This section explains how to configure SDP-response early media suppression, which can be used when the Oracle® Enterprise Session Border Controller is deployed after a softswitch or proxy in the signaling path. In this deployment, user endpoints and gateways communicate directly with the softswitch or proxy, which in turn sends call signaling to the Oracle® Enterprise Session Border Controller. The call signaling gets sent back to the same or different softswitch or proxy. Because the Oracle® Enterprise Session Border Controller does not communicate with the endpoints or gateways that are the media terminators, early media suppression for this deployment must use SDP-based addressing rather than the SIP-based addressing (described in the SIP Early Media Suppression section in this technical notice).

Using this feature lets you configure specific IP addresses for which early media should not be suppressed, based on SDP addressing. The Oracle® Enterprise Session Border Controller checks the SDP addresses in SIP responses against these IP address or address ranges to determine on which media gateway a call terminates.