IP Telephony: Sizing, Case Studies and Trends 2003-2008

Executive Summary 

I. Overview and Background of IP 
- A. History of the PSTN and Legacy Switches 
- B. Emergence of IP and Packet Networks 
- C. How Does IP Work? 
- D. Types of IP Products and Segments 

II. How Big Will IP Become?
- A. Revenue Sizings 45-47

III. Drivers and Obstacles to IP
- A. Costs & Value-Added Services
- B. Regulatory & Quality of Service 

IV. Who Are the Players and What Are Their Parts?
- A. Regional Bell Operating Companies
- B. Interexchange Carriers (IXCs)
- C. Competitive Local Exchange Carriers (CLECs)
- D. Next Generation Players 
- E. Cable Providers

V. Other IP Services
- A. Voice Portals 
- B. IP Centrex 
- C. Unified Messaging 

VI. Conclusions 

Appendix
- Glossary