Plain Old Telephone Services (POTS) are used to establish the voice connection between two telephone users; and supplementary services such as call waiting, call forwarding, and call completion to busy subscribers, provide additional functions to POTS. In order to facilitate the communication between users, telecommunication networks should provide new services to end users in a quick way. However, the introduction of new telecommunication services into the existing network may interfere with the existing services, thus causing feature interactions. In many cases, feature interactions bring the unwanted or undesired system behavior to end users, decreasing the service quality. Although new technology like Intelligent Networks (IN) enables the quick introduction of new telecommunication services, but owing to the feature interaction, and the vast effort has to be put into checking the compatibility between telecommunication services. Feature interactions has become the bottle-neck problem to the development of new telecommunication services.