Introduction
Providing Voice over Internet Protocol (VoIP) telephony
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What you need to know
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1. Unified Communications Overview
Unified communications (UC) overview
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Making a call using VoIP
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Evolution of the Public Switched Telephone Network (PSTN)
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Moving from the PSTN to VoIP
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2. Components and Integration
UC components
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Unifying communication systems
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Voice signal conversion with digital codecs
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Data transportation using real-time protocols
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3. Media Gateway
Passing telephony data through gateways
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Understanding MGCP/Megaco (H.248)
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Session Initiation Protocol (SIP)
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The H.323 wrapper, H.225, and H.245
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Translators and mixers
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4. Business Integration
Plan a unified communications system
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Network assessment
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Assure quality of service
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VoIP security
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Conclusion
What's next?
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