A unified communication threat management system for cloud-based service providers that supports up to 1,000 active sessions and thousands of users per Ethernet segment. Cloud-based on Hosted VoIP network services. Provides core network security for call servers, softswitches, conferencing, unified messaging, devices (SIP) and subscriber data. Complete UC-aware stateful & deep packet inspection (DPI) for SIP trunks. Globally sourced signature and blacklist update services for VOIP, video, UC application and server threats. Enforces carrier authentication and authorization policies. Deep and broad visibility and analytics of user, application and network-level traffic of SIP based networks.