scope:

This Recommendation specifies high-level requirements for the development of a set of ITU-T Recommendations which will constitute NGN release 1.

The high-level requirements and related capabilities specified in this Recommendation are aligned with the general goals and objectives captured in [ITU-T Y.2001] and are based on the objectives of NGN release 1 identified in [b-ITU-T Y-Sup.1]. NGN is required to provide at least one level of service that offers capabilities that are the same or better than those provided by circuit-switched networks.

More detailed requirements and service-specific requirements are outside the scope of this Recommendation. While requirements on user equipment are outside the scope of this Recommendation, requirements associated with access arrangements are within the scope.

It is recognized that a specific realization of NGN may be constituted by a set (or superset) of services supported in NGN release 1 and of capabilities as specified in this Recommendation.

Administrations may require providers to take into account national regulatory and national policy requirements in implementing this Recommendation.