For many years, Cisco IT used Cisco 7845 Media Convergence Servers (Cisco MCS) as a standard hosting platform for voice services. Their challenges are to grow current UC solution, simplify management of UC systems and upgrade UC servers with minimal downtime. They chose Cisco to overcome these challenges. They have implemented migrate to Cisco UCS servers for all UC services and use different migration paths depending on size of UC cluster. The results of implementing Cisco were completed migration with little downtime, reduced number of servers by 67 percent, power by 84 percent, cabling and space by 87 percent and all later UC upgrades performed on virtual machines with zero downtime.