The Wilcom Model F6222 Telecom Optical Fiber Identifier is a rugged, easy-to-use installation and maintenance instrument which identifies optical fibers by detecting the optical signals being transmitted through a fiber. By utilizing local detection technology (non-destructive macro-bend detection which does not damage or overstress the fiber), this units eliminates the need to open the fiber at the splice point for identification; eliminating the probability of interrupting service.