Intelligent networks, which offer enhanced telecommunication services and operations through distributed network resources, are discussed in parallel with ISDN implementation. A user-friendly human-machine interface is one of the most important elements of an intelligent networks. This paper proposes a voice conversation facility with the following configuration and functions to be used in an intelligent network. The human-machine interface is to be implemented as an intelligent peripheral function which is an intelligent network node commonly used for many services. This function is to be conceptualized as an automated network operator, which can operate many services. An instantaneous service activation, automated service operations and easy input/output by interactive voice interface are essential for this concept. In addition, a system design example of an intelligent voice mail system is discussed. The system is based on a conversational model which is determined from 600 operator conversations and applying the voice recognition techniques available in the near future. Using speaker-independent word-spotting techniques which recognize up to 100 words from a continuously spoken sentence, the system will be able to converse naturally with users for selecting voice mail services and functions.
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