Internet communications using SIP: delivering VoIP and multimedia services with Session Initiation Protocol
The Intelligent Network Standards: Their Application to Services
The Intelligent Network Standards: Their Application to Services
Converged Networks and Services: Internetworking IP and the PSTN
Converged Networks and Services: Internetworking IP and the PSTN
SIP Demystified
Distributed algorithms and protocols for scalable internet telephony
Distributed algorithms and protocols for scalable internet telephony
Integration of Internet and telecommunications: an architecture for hybrid services
IEEE Journal on Selected Areas in Communications
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We propose a general purpose service architecture for realizing services which start in the Public Switched Telephone Network (PSTN) but terminate and execute on the Internet. We discuss the needs for such services, our early research efforts in this direction which lead to prototyping certain benchmark services, and the current state of work in this area. We demonstrate the feasibility of the architecture by focusing on services which involve wireline PSTN as well as the wireless aspects (2 G, 2.5 G) of the PSTN. Our methodology is attractive since it keeps each of the domains (PSTN and Internet) unaware as to where the service is executing with respect to which domain actually requested the service. Individual entities participating in the service do not have any knowledge that external entities from another domain also contributed in the execution and fulfillment of such services. Our approach, as embodied in the service architecture, is to leverage the best of the Internet protocols (SIP, XML, HTTP) and technologies (instant messaging, presence) to provide a general framework for personalized service specification and execution.