Cisco Media Convergence Servers 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, IP Interactive Voice Response (IP IVR), Cisco Personal Assistant, Cisco Queue Manager, and Cisco Unity.The Cisco MCS 7835H-3000 provides a highly available mid-level rack mounted server solution that is equipped with an Intel Prestonia Xeon 3060 MHz processor, up to six hot-swap Small Computer Systems Interface (SCSI) hard disks, a Redundant Array of Independent Disks (RAID) 1/0 Controller, hot swap fans and redundant hot swap power supplies. An optional tape backup is available for some models of the MCS 7835H-3000.