With Cisco UCM you get an enterprise-class IP communications processing system VoIP and Video calls for for up to 40,000 users, and even 80,000 users with a "mega cluster." In addition to traditional telephony features, it provides advanced capabilities, such as video, mobility, presence, preference, and full-featured conferencing services. Extend video capabilities to your employees through a single, unified communications infrastructure from the desktop to TelePresence rooms. Simplify voice systems with unified communications to cut costs and dramatically streamline provisioning and maintenance