This Recommendation defines an Intelligent Network "Capability Set 2'' (IN CS-2) compliant stage 2 description of Universal Personal Telecommunication (UPT). It does not in any way provide an implementation or technology dependent description. It identifies the functional capabilities and information flows needed to support the service for UPT Service Set 1 on IN CS-2, as defined in ITU-T F.850 [1] and F.851 [2]. ITU-T F.851 [2] categorizes the functionality into essential and optional. This Recommendation includes only those service features achievable with current ITU-T signalling Recommendations. Networks not supporting existing ITU-T signalling Recommendations may be unable to provide all the features in this Recommendation that cover the case of UPT capable networks (able to process UPT calls and procedures).