Per User CAC Sessions
You can set the number of CAC for sessions per user in the realm configuration. Depending on the CAC mode you set, the sessions are shared between contacts for the same AoR or the endpoints behind the same IP address.
When it receives an INVITE, the Oracle® Enterprise Session Border Controller determines the registration entry for the calling endpoint and the registration for the called endpoint. It then decides if session can be established between the two. If it can, the Oracle® Enterprise Session Border Controller establishes the session and changes the active session count for the calling and called endpoints. The count is returned to its original value once the session is terminated.