SIP Unauthorized Endpoint Call Routing

The Oracle® Enterprise Session Border Controller (E-SBC) can route new dialog-creating SIP INVITEs from unauthorized endpoints to a session agent or session agent group; then rejection can occur based on the allow-anonymous setting for the SIP port. This type of provisional acceptance and subsequent rejection applies only to INVITEs; the E-SBC continues to reject all other requests, such as SUBSCRIBE.

You might enable this feature if you have a network in which unauthorized SIP endpoints continually try to register even if the Oracle® Enterprise Session Border Controller has previously rejected them and never will accept them. For instance, the user account associated with the endpoint might have been removed or core registrars might be overloaded.