Cisco Unified Communications: Unifying Communications Infrastructure

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Cisco Unified Communications: Unifying Communications Infrastructure

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Gateway devices and Call Managers are not limited to geographical boundaries. A properly designed system would easily provide the scalability, redundancy and fault tolerance that highly available networks require. The unified communications approach relates very closely to the Internet model that the Department of Defense designed. The Cisco Call Manager server clustering approach represents a highly available network model that can meet disaster recovery requirements when aligned with the proper underlying quality of service (QoS)- enabled infrastructure. QoS is the glue of the network that guarantees the quality level necessary for real-time communications, such as voice and video....

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