Security – Encryption, Authentication, Registration, SIP Protection, Voice Policy, Toll Fraud Prevention, Telephony Denial of Service (TDoS) Attack protection. Session Control – Call Admission Control, Trunk Routing, QoS, Statistics, Billing, Redundancy, Scalability, Voice Quality Monitoring. The Cisco Unified Border Element (CUBE) Enterprise is Cisco’s SBC offering and it enables rich multimedia communications for enterprises by providing: These SIP trunks terminate on a session Border Controller (SBC) at the enterprise that serves as a demarcation point between the enterprise and the service provider IP networks, similar to how firewalls separate two data networks. At the heart of IP-based telephony trunks lies the Session Initiation Protocol (SIP), which is an industry standard communications protocol based on RFC3261, and is widely used for controlling multimedia communication sessions and applications such as voice, video, unified messaging, voicemail, and conferencing. This has resulted in significant migration from TDM based circuits, by both enterprises and telephony service providers, to IP-based trunks for Unified Communication. Innovations in collaboration services have delivered significant improvements in employee productivity and enterprises are widely deploying IP based Unified Communications, both for internal calling within the enterprise and external PSTN access.

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