Summary

Amendment 1 to Recommendation ITU-T G.650.3 (2008) adds a new Appendix III, which describes a method for differentiating splice loss and macrobending loss in installed links. The method is based on OTDR measurement at two wavelengths, and it is recommended to use a bidirectional OTDR method which is able to determine the exact loss at the splice point. This optional method can be used to identify the main loss factor when large loss is observed in an OTDR trace.