Cisco Media Convergence Servers (MCS) provide highly available server platforms to host IP Communications applications. These platforms address enterprise customer requirements for Cisco CallManager installations from 2 to 30, 000 IP phones within a single Cisco CallManager cluster as well as providing platforms for Cisco Conference Connection, Cisco Emergency Responder, Cisco IPCC Express (ICD), Cisco IP Interactive Voice Response (IP IVR), Cisco IP Phone Messenger, Cisco Personal Assistant, Cisco Queue Manager, and Cisco Unity.The Cisco Media Convergence Server 7845H-2400 (MCS 7845H-2400) is an integral part of a complete, scalable architecture for a new generation of high-quality IP voice solutions that run on Enterprise data networks. The MCS 7845H-2400 delivers the high performance and availability that today's enterprise networks demand and represents a turnkey solution that is easy to deploy and highly cost effective. At only 2U high, the MCS 7845-2400 packs tremendous power in a low-profile chassis that minimizes rack space.