Implementing Endpoint Services Using the SIP Servlet Standard

Voice over IP applications at endpoint devices are typically implemented using proprietary methods and are closed and not extensible. This hinders innovation and competition. On the other hand, a number of open standards have emerged for programming network services. The SIP Servlet API is the dominant standard and is widely implemented. This paper examines the feasibility of using the SIP servlet API for programming endpoint applications. An enterprise communication system is used as the case study. This investigation shows that this is a promising approach with advantages such as application reuse and support for application composition. A number of issues are identified that may be addressed by enhancing the current SIP servlet container implementations.