Summary

This Recommendation defines relationships among a set of existing ITU-T Recommendations that collectively provide the basis for the specification and apportionment of performance in narrow‑band and broadband ISDNs, Internet Protocol (IP)-based networks, and digital layers of transport networks, as well as jitter, wander, and 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 digital layers of transport networks.