Communications cables, namely fiber optic cable and hybrid cables incorporating fiber optic cable, and connectors therefore; optical fiber, dispersion-compensating modules, metabolized pigtails, optical connectors, optical amplifiers, optical modulators, lasers for non-medical use, optical attenuates, optical multiplexes, optical adaptors, optical terminators, jumpers, shelves and fiber management frames, splitters, fiber optic splice closures; and telecommunications systems, comprising optical fiber and / or optical fiber cable, optical amplifiers, optical transmitters and optical receivers