The introduction of third generation digital mobile systems known as FPLMTS, which are scheduled to start service around the year 2000 subject to market considerations, will result in mobile communication becoming available to mass markets for the purpose of global communication. This Recommendation defines the service objectives and principles for FPLMTS which will enable the development of FPLMTS into the future. These objectives and principles are produced to aid the intercommunication of services provided over both FPLMTS and the fixed telecommunication network and to provide guidance for further development of FPLMTS.