Communication apparatus, devices and connectors; connecting elements for Broadband and Narrowband communication networks and data networks, specifically terminal strips, isolating plug connectors and connecting blocks provided with electric contacts, receptacle outlets; cable runs and cable clamps, connecting cables and connecting cords, optical fibers, plugs, connectors, printed circuit board connectors, optic fiber couplings, protective magazines and elements, shield clamps, covering strips, connecting parts, connecting frames, contoured-section frames and housings for the above- named connecting elements, in particular for use in principal and secondary distribution systems, cable distribution cabinets, branch points and terminal heads; drawer units for housings, optical and electronic components and devices (to the extent included in Class 9), modems and data processing programs (to the extent included in Class 9) for communication networks and data networks