1. Introduction
2. Internet Telephony: The Evolution to a Service-Oriented
Architecture
3. Background: Providing Telephony Service
4. Comparative Analysis of Signaling Protocols
5. Crossover Services Originating on the Internet
6. Crossover Services Originating on the Public Switched
Telephone Network
7. Smart Spaces in the Telecommunications Domain
8. Conclusions
Appendix A: The SPIRITS (Services in PSTN Requesting Internet
Services) Protocol
B: Interworking SIP and Intelligent Network (IN)
Applications
C: XML Schema for PSTN Events
D: XML Schema for SMS to IM
E: Raw Data for Event Manager Performance Analysis
