The reel of fiber optic cable may be rotated from its vertical position to its horizontal position by adjusting the tension of chains attached to the distal ends of the L-shaped frame, thus shifting the weight from the first-side support casters, onto the transition disc, and onto. The reel of fiber optic cable may be rotated from its vertical position to its horizontal position by adjusting the tension of chains attached to the distal ends of the L-shaped frame, thus shifting the weight from the first-side support casters, onto the transition disc, and onto. The FCR-1000 series cable reels are designed to fit Princetel's standard FORJs and slip rings. The rotary joints are protected inside the drum for durability and seamless deployment of single or multi-channel fiber optic and/or electrical cable with uninterrupted optical and/or electrical signal. A Fiber Optic Rotary Joint (FORJ) is a device that allows an optical signal to be transmitted across the interface between a continuously rotating platform and its stationary support structure. This is adjusted to the length of the cable as well as the number of fiber ctor is used. Proterial brings you high. Micropol designs and manufactures rugged cable reels, cable drums, and event fiber reels in Sweden, engineered for harsh environments, demanding field conditions, and live event applications. Whether you need lightweight but robust solutions for broadcasting, outdoor events, excavation, military.