Editor note: You should also take a look at the following free chapter downloads on SearchEnterpriseVoice.com.
Cisco CallManager Best Practices- Chapter 1: Planning the CallManager Implementation
Cisco IP Telephony - Chapter 1: Introduction to Cisco IP Telephony (CIPT) Components
Troubleshooting Cisco IP Telephony - Chapter 1: Methodology and Approach
Cisco IP Telephony: Planning, Design, Implementation, Operation, and Optimization
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