Call Admission Control and Policing
The Oracle® Enterprise Session Border Controller supports call admission control (CAC) based on realm, and it applies the limits on either ingress or egress bandwidth counters. If a calls exceeds bandwidth on either the ingress or egress side, the Oracle® Enterprise Session Border Controller rejects the call. You can also use per-user CAC, which limits the maximum bandwidth from the east and west flows for both the TO and FROM users.
When you apply media profiles to a realm, the Oracle® Enterprise Session Border Controller applies bandwidth policing from the flow’s ingress realm media profile. In the diagram below, the Oracle® Enterprise Session Border Controller policies traffic for Realm A based Realm A’s policing values, and the same is true for Realm B.
![](img/GUID-B1B3D8B5-AE11-49B6-A475-3A96BAC75352-default.jpg)