Over the past decade, the telecommunications industry has witnessed rapid changes in the way people and organizations communicate. Many of these changes spring from the explosive growth of the Internet and from applications based on the Internet Protocol (IP). The Internet has become a ubiquitous means of communication, and the total amount of packet-based network traffic has quickly surpassed traditional voice (circuit-switched) network traffic.

Topics
1. The Great Voice Myth
2. Making Sense of the VoIP Standards
3. Understanding Centralized and Distributed Architectures
4. H.323
5. MGCP/H.248/MEGACO
6. SIP
7. Interconnecting VoIP Protocols
8. Conclusion: Packet Voice and VoIP Is About Services, Not Protocols


A pdf file by Cisco Systems