CISCO CM4.3-K9-7816-H3S

SW ONLY UNIFIED CALLMGR 4.3 CROM F/ MCS 7816-H3 100 USER EN

Cisco Unified CallManager Version 4.3 is an enterprise IP telephony call-processing solution that is scalable, distributable, and highly available. Multiple Cisco Unified CallManager servers are clustered and managed as a single entity. Cisco Unified CallManager clustering yields scalability of from 1 to 30,000 IP phones per cluster, load balancing, and call-processing service redundancy. Interlinking multiple clusters allow system capacity to reach 1 million users in a system of more than 100 sites. Clustering aggregates the power of multiple, distributed Cisco Unified CallManager installations, enhancing the scalability and accessibility of the servers to phones, gateways, and applications-and triple call-processing server redundancy improves overall system availability.