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Modern telecommunications networks and classical roles of operators are subject to fundamental change. In the age of Web expansion, many network operators are currently seeking for new ways to create and provide applications on top of converging eXtreme Modelnetworks. Enabling user generated services as well as the smooth integration of communications services into mash-ups and other 3rd party services is a key capability for the service creation environments. In this paper we describe our approach to enabling eXtreme model driven design of parlay X-based communications services, which is a standardized collection of Web services that expose next generation networks (NGN) core services to 3rd parties. We explain how to integrate parlay X services in a service creation environment adequate for easy, user-level mash-up design as a human-computer interaction during service design and creation phase. We illustrate the integration into end-to-end multiplatform service orchestrations by means of an assisted living scenario that has been exhibited at the German CeBIT 2009 fair to show how human beings may interact with automated processes through real-time communication channels.