View these downloadable videos for training on implementing Cisco Unified Communications IP telephony systems.
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Unified Communications System Install and Upgrade 
This group of videos summarizes the system components and illustrates the uses of the reference architectures. They describe preparing and planning for an upgrade; an outline of the upgrade process; and recommendations for efficient upgrading. They also identify functionality changes and special application integration notes.
For more Cisco Unified Communications training videos, see the Training Library.