Single reel inspection work includes: checking, counting, appearance inspection and measurement of the specifications and quantity of optical cables and connecting equipment transported to the site, and measuring the main optoelectronic characteristics. Through inspection, it is confirmed whether. Fiber Optic Testing Testing is used to evaluate the performance of fiber optic components, cable plants and systems. In FTTH, ODN, and data center deployments. For cable reels and extension cords, the inspection also consists of a visual inspection and one or more measurements. Visual inspection The connection cable (cord) must not be damaged in such a way that it poses a safety hazard.