INVITEs UPDATEs Initially Received By Oracle® Enterprise Session Border Controller

When the Oracle® Enterprise Session Border Controller first receives an INVITE or UPDATE message, it considers if it should be admitted provisionally or rejected outright due to CAC bandwidth constraints. If the INVITE or UPDATE is admitted provisionally, a Require: header is inserted on egress from the system.

The Oracle® Enterprise Session Border Controller inserts the Require header on egress under these conditions:

• It receives an INVITE / UPDATE with no or a non-matching Require header.
• The egress conditional cac admit parameter in the SIP profile on the egress realm, SIP interface, session agent is set to enabled in the egress realm
• The request would otherwise be rejected because of current bandwidth CAC limits in the ingress OR egress realms
• The call is a candidate for media-release in the ingress realm

A call is considered a candidate for media-release when the ingress realm has any of these parameters set to disabled:

• mm-in-realm
• mm-in-network
• mm-same-ip
• mm-in-system