Summary

Supplement 39 to ITU-T L-series Recommendations provides information on the guideline used in the development of optical fibre cable Recommendations. The guideline also helps readers to understand the organization of the ITU-T L.100-series cable Recommendations. Supplement ITU-T L.Suppl.65 illustrates national experiences relating to ITU-T L.1xx-series Recommendations. These national experiences should be maintained according to the guidelines given in ITU-T L.Suppl.39.