Summary

ITU-T Recommendation G.828 [6] specifies error performance parameters and objectives of international, constant bit rate synchronous digital paths. Error performance objectives of ITU‑T Recommendation G.828 refer to the hypothetical reference path (HRP) of a length of 27 500 km. ITU‑T Recommendation G.828 does not contain information on path elements.

NOTE - Performance objectives for SDH paths using equipment designed prior to the adoption of Recommendation G.828 in March 2000 are given in ITU-T Recommendation G.826. [5]

This ITU-T Recommendation defines error performance events and block structures for SDH multiplex and regenerator sections (see ITU-T Recommendations G.707 [1] and G.708 [2] for reference). SDH equipment functional blocks and SDH management are defined in ITU‑T Recommendations G.783 [3] and G.784 [4]. Observing the definitions given in this Recommendation shall ensure that error performance assessment on SDH multiplex and regenerator sections yields compatible results. Definition of events in this ITU-T Recommendation is based on the same basic concept as in ITU-T Recommendation G.828 [6].

Performance monitoring of SDH sections is not mandatory. If implemented, the specifications of this ITU‑T Recommendation apply