Service-Oriented Design: The jABC Approach

Service-Oriented Design has driven the development of telecommunication infrastructure and applications, in particular the so-called Intelligent Network (IN) Services, since the early 90s: IN services are customized telephone services, like e.g., Free-Phone, where the receiver of the call can be billed if some conditions are met, Virtual Private Network, enabling groups of customers to define their own private net within the public net, or Credit Card Calling, where a number of services can be billed directly on a credit card account. The realization of new IN services was quite complex, error prone, and extremely costly until