The Avaya SBCE delivers security to a SIP-based Unified Communications network. It is available in two versions: Advanced Services and Basic Services. Either version can reside on one of two servers, the Dell R210 II XL or the Portwell CAD-0208. The Avaya SBCE has two main components: the Session Border Controller (SBC) and a management system called the Element Management System (EMS). In the simplest configuration, the SBC and EMS co-reside in the same physical server. High availability configurations require a separate EMS server.