About the SIP Home Realm

The realm configuration is also used to establish what is referred to as the SIP home realm. This is the realm where the Oracle® Enterprise Session Border Controller’s SIP proxy sits.

In peering configurations, the SIP home realm is the internal network of the SIP proxy. In backbone access configurations, the SIP home realm typically interfaces with the backbone connected network. In additions, the SIP home realm is usually exposed to the Internet in an HNT configuration.

Although you configure a SIP home realm in the realm configuration, it is specified as the home realm in the main SIP configuration by the home realm identifier parameter. Specifying the SIP home realm means that the Oracle® Enterprise Session Border Controller’s SIP proxy can be addressed directly by connected entities, but other connected network signaling receives layer 3 NAT treatment before reaching the internal SIP proxy.