It is recommended that all fiber connector are inspected, cleaned, re-inspected prior to every mating. This will help prevent cross contamination and dirt build up Invisible laser radiation might be emitted from fibers or connectors. Do not stare into beams or view directly with. Visual inspection identifies contamination, scratches, cracks, and endface defects that directly affect optical performance. Insertion. learn the end-to-end inspection process for optical cables, from receipt to project completion, ensuring optic fiber cables quality and network reliability. Whether you have a handheld scope or fancy video scope, this important step should always be done first.