This Recommendation
establishes general principles for Universal Personal Telecommunication (UPT).
Detailed provisions may be found in Recommendation F.851.� UPT enables access to telecommunication
services while allowing Personal Mobility. It enables each UPT user to
participate in a User-defined set of subscribed services and to initiate and
receive calls on the basis of a personal, network-transparent UPT Number across
multiple networks at any terminal, fixed or mobile, irrespective of geographic
location, limited only by terminal and network capabilities and restrictions
imposed by the network operator.