The Cisco MCS 7835-I2 Media Convergence Server is a high-availability server platform for Cisco Unified Communications solutions. 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 Cisco MCS 7835-I2 delivers the high performance and availability demanded by today's enterprise networks - and it is easy to deploy and highly cost-effective. At only 2 rack units (2RU) high, the Cisco MCS 7835-I2 packs tremendous power in a low-profile chassis that minimizes rack space.This product is designed for the following systems:Cisco Unified CallManager;Cisco Emergency Responder;Cisco Unified Presence Server.