Which term refers to the minimum cable bend radius for fiber cable?

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Bend radius is the smallest bend a fiber cable can make without risking performance or damage. The term that refers to the minimum allowable curvature for a fiber is exactly the minimum bend radius for fiber cable. This value depends on how the cable is built—fiber type (single-mode vs multimode), jacket and strength members—and is specified by the manufacturer. Bending tighter than this radius can cause macrobending or microbending losses and may harm the fiber or its protective jacket, so engineers route cables to respect this limit. The other options describe different concepts—splicing limits, fiber type, or enclosure design—and do not define how tightly a fiber cable can be bent.