View these downloadable videos for general training on planning Cisco Unified IP telephony systems.
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Unified Communications System Overview
This video describes the system release approach. It presents the system components at a high level; describes system bundles, pricing, and services; and outlines the deployment models and migration strategies.
http://tools.cisco.com/cmn/jsp/index.jsp?id=49691 
•Unified Communications System Architecture
This video describes the purposes and uses of the system architecture components. It details the SRND-recommended deployment models, and describes the changes to the deployment models for Cisco Unified CallManager and Cisco Unity. It also covers security and network management recommendations.
–Part 1: Unified Communications Architecture
http://tools.cisco.com/cmn/jsp/index.jsp?id=49744
–Part 2: Contact Center Architecture
http://tools.cisco.com/cmn/jsp/index.jsp?id=49719
For more Cisco Unified Communications training videos, see the Training Library.