Summary

This Recommendation defines network performance parameters, objectives and measurement methods for describing availability performance of international constant bit-rate digital paths at or above the primary rate. Performance objectives are specified for specific elements of the international path. Path elements are categorized according to their position in the path and their length. Guidance on determining expected end-to-end performance is provided in Annex A, and depends on the actual path topology. Measurement methods are also provided to enable estimation of path element performance using sampling techniques.