Fiber slack storage units are devices used to coil up and store additional length of fiber optic cable. This secures the cable while eliminating slack. The fiber slack storage device can be mounted aerially, on a wall, or inside a vault. Amphenol Network Solutions introduces the C2Storage Fiber Tray, a high-capacity, space-saving solution designed to simplify fiber slack management while maintaining network integrity. Ideal for data centers, central offices, and headend environments, it optimizes fiber routing and accessibility for. oy increasing amounts of optical fiber. An integrated box holder is included. Primus Cable supplies half round spools, plastic Sno-Shoes.