A Session Border Controller (SBC) is a networking device designed to secure and control voice and video traffic as it enters and leaves an enterprise IP network. An enterprise-focused SBC provides voice and video connectivity from the enterprise IP network to service provider SIP trunks, ensuring that the calls are compliant with service provider requirements. CUBE (Cisco Unified Border Element) is an enterprise-focused SBC from Cisco that provides voice and video connectivity from the enterprise IP network to service provider SIP trunks. CUCM (Cisco Unified Communications Manager), CVP (Customer Voice Portal), and DNIS (Dialed Number Identification Service) are not enterprise-focused SBCs.