SIP Routing

This section describes SIP session routing. When routing SIP call requests, the Oracle® Enterprise Session Border Controller communicates with other SIP entities, such as SIP user devices, other SIP proxies, and so on, to decide what SIP-based network resource each session should visit next. The Oracle® Enterprise Session Border Controller processes SIP call requests and forwards the requests to the destination endpoints to establish, maintain, and terminate real-time multimedia sessions.

Certain items in the messages are matched with the content of the local policy, within constraints set by the previous hop session agent, and the SIP configuration information (for example, carrier preferences) to determine a set of applicable next hop destinations.

The sending session agent is validated as either a configured session agent or a valid entry in a user cache. If the session INVITATION does not match any registering user, the SIP proxy determines the destination for routing the session INVITATION.