9 Electrical cables and wires; Cables and wires for transmitting data; Network cables and wires; Cables and conduits for electrical and optical transmission; customer specific electrical and/or optical cables and conduits and parts thereof; Lines and conduits for electrical and/or optical data transmission; Fibre-optics for communications networks; Junctions and/or connections of electrical cable and lines, electrical cables and circuit networks; customer specific junctions and/or connections of electrical cables or lines and parts thereof; electrical cable and circuit networks and parts thereof; Electrical and/or optical communication links, namely, Ethernet links, bus links, optical fibre links; communication links, namely, Ethernet links, bus links, optical fibre links, and communication networks consisting of network routers, communication servers, communication adapters, network hubs, bus systems, modems, switches, and network cables; Electrical and/or optical connecting elements for cables, lines and conduits and parts therefor, in particular plugs and plug connectors; Accessories for connecting elements for cables, lines and conduits, namely, sleeves, conductor end sleeves, cable lugs, panel connectors, insulating and screening connectors, and labels and marking elements; Apparatus and instruments for conducting, distributing, switching, transforming, accumulating, regulating and/or controlling electricity; Connectors for electrical and optical wires and lines; Electrical cable channels; Cable sheaths for electrical and optical wires; Screw connections for electrical cables, lines and conduits; Accessories for screw connections for electrical cables, lines and conduits, namely, inserts, and label and marking elements; Measuring apparatus, namely, electrical and optical meters, power meters, capacitance meters, ampere meters; Data processing apparatus; Apparatus for the transmission of data; Data storage devices; Printers for computers, Apparatus for operating and checking communications networks having electrical lines and/or conduits, in particular measuring apparatus, analyzers, network terminals, network computers, terminal servers, computers for network management, splitters, duplexers, multiplexers, modems, transceivers, repeaters, gateways, routers for computer networks, switches for computer networks, hubs for computer networks; Apparatus for operating electrical and/or optical communication networks; Apparatus for operating communications networks comprising fibre-optics and glass-fibre lines and/or conduits; Apparatus for operating fibre-optic communications networks; Measuring apparatus for measuring communications networks, in particular fibre-optic communications networks; Analysers for checking communications networks, in particular fibre-optic communications networks, network terminals, network computers, terminal servers for communications networks, in particular for fibre-optic communication; Computers for managing communications networks comprising electrical and/or optical lines and/or conduits, in particular for fibre-optic communications networks; Distributors and/or Splitters for communications networks, in particular for fibre-optic communications networks; Duplexers and Switches for communications networks, in particular for fibre-optic communications networks; Multiplexers for fibre-optic communications networks; Modems for communications networks, in particular for fibre-optic communications networks; Transceivers for communications networks, in particular for fibre-optic communications networks; Receivers for communications networks, in particular for fibre-optic communications networks; Gateways for communications networks, in particular for fibre-optic communications networks; Routers for communications networks, in particular for fibre-optic communications networks; Switches for communications networks, in particular for fibre-optic communications networks; Hubs for communications networks, in particular for fibreoptic communications networks; Recorded Software for a firewall; Installation frames and assembly racks for network components; Computer recorded or downloadable software systems for planning, designing, configuring and marking of cables and networks; Recorded management software for industrial networks (OPC); Recorded or downloadable middleware for organizing and operating networks; Data carriers equipped with programs, namely, programs for planning, designing, configuring, operating, organizing and/or marking cables and networks