The OSI reference model was designed to create standard methods of connecting and communicating across data networks. In the realm of voice, similar connection models exist to describe voice communications. Cisco has developed a type of model to describe the Unified Communication System.
Cisco Voice Unified Communications Layers
Endpoints Layer | IP Phone, Wireless/Cell phone, Video Phone, IM Client |
Applications Layer | Voice Mail, Conference Call Apps, Call Center Apps, 911 Services |
Call Processing Layer | Unified Communications Manager, Unified Communications Manager Express, UC500 |
Infrastructure Layer | ASA Firewall, Voice Router/Gateway, Voice Switch |
While the layers work together to create a functional voice network, each layer performs unique functions to the voice network.
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