The Oracle Enterprise Communications Broker (OECB) allows you to configure up to four separate Virtual Local Area Networks (VLAN) to help manage your deployment. For example, you might want separate networks for certain departments or locations. Each VLAN connects to its own uniquely defined network interface and SIP interface, which allows you to create separate networks.

When you perform the initial configuration, the system creates a default network called "ecb" and one SIP interface with the Realm ID set to "ecb." The system also populates the Realm ID parameter in the Session Agent, LDAP, and ENUM configurations with "ecb."