This Recommendation covers bringing international multi-operator transmission entities into service. These transmission entities include paths, sections, and transmission systems that cross international and operator boundaries. This involves control and sub-control stations whose roles are specified in ITU-T Recs M.80 [3] and M.90 [4]. Various administrative and technical measures are applicable to these operations. Such measures are distinct from equipment acceptance procedures (commissioning) resulting from a contract with a supplier (internal or external to the Administration).