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Implementation of advanced intelligent network system at NTT and its future development

NTT has developed and is continuing to develop a number of technologies for implementing advanced intelligent networks (AIN). NTT has implemented an AIN that supports diversified service specifications, provides highly customized services, and makes it possible to promptly develop new services. Its first step towards commercialized AIN services was the Personal Handy-phone System (PHS) introduced in November 1997. Future IN services will result from the interworking of AIN with the Internet.