ITU-T Recommendations

ITU-T Recommendation G.650.3 outlines the tests normally done for installed optical cable sections. It includes a collection of references to the main measurement methods and gives an indication of which are most suitable for installed cable sections, depending on the required inspection level needed. This Recommendation uses a tiered approach. The first level indicates measurements that may normally be done as part of installation. The second level indicates measurements that are normally done on exception, such as to satisfy service level agreements or to verify attributes of older links that may be used at high bit rates.