Connecting elements for communication networks and data networks, specifically terminal strips, isolating plug connectors and connecting blocks provided with electric contacts, receptacle outlets; leads for cables and cable clamps, connecting cables and connecting cords, single mode and multi mode signal transmission optical fibers, copper plug electrical connectors, optical fiber plugs, connectors, printed circuit board connectors, optical fiber couplings, protection modules with surge arresters, shield clamps, connecting frames, contoured-section frames and housings for the fiber couplings, protection modules with surge arresters, shield clamps, connecting frames, contoured-section frames and housings for the above-named connecting elements, in particular in use for principle and secondary distribution systems, cable distribution cabinets, branch points and terminal heads; drawer units for use with electrical and fiber optic cable housings; optical and electronic connectors for connecting optical plugs to light wave transmitting cables, modems
Electrical and Scientific Apparatus