This Recommendation is one of a set of closely related Recommendations comprising RecommendationsE.810, E.830, E.845, E.850 and E.855 concerned with the accessibility, retainability and integrity of telecommunication services, specially telephone services.
ITU-T E.855 FRENCH-1993 history
1993ITU-T E.855 FRENCH-1993 CONNECTION INTEGRITY OBJECTIVE FOR INTERNATIONAL TELEPHONE SERVICE