• Executive Summary
  
• Methodology
  
• Cable Telephony Services
  
  • The Market in Late 2005
    
  • Market Drivers for Cable Telephony
    
  • The Progression of Voice over Cable: Circuit-Switched to VoIP
    
• Delivering Cable Telephony: Network Architectures Converge
  
  • The Circuit-Switched Network
    
  • The “Switched-IP” Network Architecture
    
  • VoIP Networks
    
    • IP-Enabled Voice Service
      
    • The IP Connection
      
    • The IP Network and the PSTN
      
    • Types of IP Telephony
      
    • VoIP In an HFC Network
      
    • IP Network Architecture
      
  • The Twisted-Pair Overlay Network
    
• Technology Standards for VoIP-Based Cable Telephony
  
  • Cable Modem Technology Standards
    
    • DOCSIS 1.1
      
    • DOCSIS 2.0
      
    • DOCSIS 3.0
      
    • International Standards
      
    • PacketCable
      
    • PacketCable 2.0
      
    • PacketCable Multimedia
      
    • IPCablecom
      
• Key Market Trends
  
  • VoIP Comes on Strong
    
  • Integrating Wireless Voice Into the Cable Service Bundle
    
• Cable Telephony Costs: Circuit-Switched vs. VoIP
  
• Cable Telephony Service Providers
  
  • North America
    
    • United States
      
      • Adelphia
        
      • Bright House Networks
        
      • Comcast
        
      • Cablevision
        
      • Charter Communications
        
      • Cox Communications
        
      • GCI
        
      • Insight Communications
        
      • RCN
        
      • Time Warner Cable
        
    • Canada
      
  • Europe
    
    • NTL
      
    • Telewest
      
    • Liberty Global
      
    • Other Operators
      
  • Rest of World (ROW)
    
    • Australia
      
    • Chile
      
    • Japan
      
    • Mexico
      
• Voice-over-Broadband: A Viable Option for VoIP
  
  • Vonage
    
  • Net2Phone
    
• Cable Telephony Service Forecasts
  
  • Subscriber Forecasts
    
  • Revenue Forecast
    

List of Tables

• Table 1. Cable Telephony Market Drivers
  
• Table 2. Telephony Service Prices in Northern Virginia: Verizon vs. Cox Communications
  
• Table 3. The Progression of Cable Telephony Technology
  
• Table 4. VoIP-Enabled North American Cable Telephony Subscribers
  
• Table 5. Cable Telephony Costs: Circuit-Switched Subscriber ($ Per Line)
  
• Table 6. Cable Telephony Costs: VoIP Subscriber, Premise Powered ($ Per Line)
  
• Table 7. Cable Telephony Costs: VoIP Subscriber, Network Powered ($ Per Line)
  
• Table 8. US Cable Telephony Subscriber Households by Cable Operator
  
• Table 9. North American Cable Telephony Deployments by Operator
  
• Table 10. Worldwide Cable Telephony Subscriber Forecast (Subscribers in Thousands)
  
• Table 11. US Cable Telephony Subscriber Forecast (Subscribers in Thousands)
  
• Table 12. Worldwide VoIP Cable Telephony Subscribers (Subscribers in Thousands)
  
• Table 13. US VoIP Cable Telephony Subscribers (Subscribers in Thousands)
  
• Table 14. Worldwide Cable-Based Voice-over-Broadband User Forecast (Users in Thousands)
  
• Table 15. Worldwide Cable Telephony Installed Lines (Lines in Thousands)
  
• Table 16. Cable Telephony Penetration of Worldwide Cable TV Households (Subscribers in Millions)
  
• Table 17. Worldwide Cable Telephony Service Revenues (US$ in Millions)
  
• Table 18. US Cable Telephony Revenue Forecast (US$ in Millions)

List of Figures

• Figure 1. The Circuit-Switched Network
  
• Figure 2. The Switched-IP Network
  
• Figure 3. The VoIP-Enabled Network
  
• Figure 4. Key Components of the PacketCable Network
  
• Figure 5. Worldwide Cable Telephony Forecast (Subscribers in Thousands)
  
• Figure 6. Worldwide Cable Telephony Service Revenues (US$ in Millions)