The Cisco MCS 7835-H2 Unified Communications Manager Appliance is a high-availability server platform for Cisco Unified Communications Manager and an integral part of a complete, scalable architecture for a new generation of high-quality unified communications solutions for enterprise data networks. Delivering the high performance and availability that today's enterprise networks demand, this solution is easy to deploy and highly cost effective. At just 2 rack units (2RU) high, the Cisco MCS 7835-H2 offers tremendous power in a low profile chassis that minimizes rack space.