Today voice processing systems especially in the area of telecommunication are used by a wide range of customers in more and more countries. The most important facts for people who create applications based on voice processing systems are rapid prototyping, updating, modification and extension of dialogues as well as their standardised components. At Deutsche Telekom research lab of speech systems and computer telephony a graphical user interface for designing computer telephony applications was developed as part of a CTI (Computer Telephony Integration) model on top of standardised interfaces for speech and other CT components in a client server architecture. The approach to this CTI model ensures the independence of different resources e.g. ASR, TTS and other. The most complicated part of this CTI model was the realisation of the resource management layer for multilingual speech interfaces because different ASR technologies do not support unified recognition functions and resource parameters.