For a brief description of all the components that are available with Cisco Unified Communications, see the Cisco Unified Communications Component Overviews 
chapter in the Cisco Unified Communications System Description.
The Component Installation and Configuration Guides topic links to information that describes components that are specific to the contact center.
The Release Matrix identifies what components and releases are needed for a selected application and the recommended hardware and software for each component. See Review Release Matrix.
The Bill of Materials (BOM) specifies the hardware and system software compatible with and required for Release 7.0(0) of Cisco Unified ICM and Cisco Unified CCE. For detailed information, see the Cisco ICM/IPCC Enterprise & Hosted Editions, Hardware and System Software Specification (Bill of Materials) document (right-click to download PDF).