Development of Parlay-based Services Using UML and SDL

Abstract: Business and residential demands for sophisticated multimedia services are constantly on the increase, while the rapid introduction of new services and the user-tailored customization are emerging as the key requirements. A number of initiatives in the area of programmable network interfaces are paving the way for the future telecoms environment where new, customized services will be developed more quickly and efficiently by the third party providers and end-users, and deployed over the operators ' network and support systems. Parlay API is one of the most notable examples of an open network programming interface, its development being carried out by the key players in the industry. Parlay specifications define a number of interfaces available to service developers, and some basic guidelines on the way of accessing these interfaces: however, no clear development approach is defined to guide the developers. Here we present and assess an approach for specification and design of the Parlay-based 3 rd party applications, based on UML and SDL. We illustrate the approach with the case study of the “Conference between three parties ” application. 1