Summary

This ITU-T Recommendation provides limits for Bringing-Into-Service (BIS) and maintenance for international SDH paths, including tandem connections, and international SDH multiplex sections using equipment designed according to ITU-T Recommendation G.828. Error, timing and availability performance events are addressed. This ITU-T Recommendation also deals with all levels of PDH signals transported within SDH containers. Regenerator sections are not covered by this ITU-T Recommendation. BIS limits and maintenance procedures for radio regenerator sections are described in the relevant ITU-R Recommendations. SDH systems designed according to ITU-T Recommendation G.826 (i.e. prior to the approval of ITU-T Recommendation G.828) are not required to be re-engineered to meet the objectives and limits of this ITU-T Recommendation.

Maintenance of systems designed to ITU-T Recommendation G.826 should use the limits given in ITU-T Recommendation M.2101.1.