Summary

This ITU-T Recommendation defines relationships among a set of existing and draft ITU-T Recommendations that collectively provide the basis for the specification and apportionment of performance in narrowband and broadband ISDNs, Internet Protocol (IP)-based networks, and the emerging Global Information Infrastructure (GII) including physical layer digital transmission performance, network synchronization and timing performance. These Recommendations are intended to be used in describing performance between the measurement points that delimit and apportion international ISDNs, IP-based networks, and the GII.