ITU-T Recommendations

This Recommendation "Universal Personal Telecommunication (UPT) - Service Description (Service Set 1)" provides the service description and operational provisions for Universal Personal Telecommunication (UPT).It describes the main principles of UPT, for example personal mobility, authentication and service profile management. It defines the UPT service aspects from the user's perspective (e.g. numbering and charging aspects). It also describes the essential features necessary to provide the UPT service, and the optional features which may be used to support additional enhancements.UPT Service Set 1 is a restricted scenario that provides UPT service that supports provision of telephone service over PSTN, ISDN and PLMN networks. UPT Service Set 2 is currently under discussion, and represents a more enhanced scenario with more features and capabilities (e.g. support of data services).