Apparatus for optical signal transmission; Apparatus for optical signalization; Apparatus for reading data on optical apparatus; Apparatus for splicing optical fibres; Apparatus for testing optical cables; Cables for optical signal transmission; Combined electrical and optical cables; Connections for use with optical fibre cables; Connections for use with optical fibres; Digital optical transmission apparatus; Digital optical transmission instruments; Digital transmission apparatus on optical fibre; Fibre optical elements; Fibre optical sensors; Infrared optical apparatus; Integrated optical chips; Integrated optical components for data transmission; Integrated optical devices; Optical apparatus and instruments; Optical apparatus for the reception of data; Optical cables; Optical cards; Optical communication apparatus; Optical communication systems; Optical communications installations; Optical component holders; Optical components, other than for medical use; Optical connectors; Optical couplers; Optical data carriers; Optical data receiving apparatus; Optical data reproducing apparatus; Optical data transmission systems; Optical detectors for use with fibre optic cables; Optical devices, other than for medical use; Optical emitters; Optical fibers (light conducting filaments); Optical fibre cables; Optical fibre installations; Optical fibre sensors; Optical fibre splicing apparatus; Optical fibre telecommunications apparatus; Optical fibre terminal apparatus; Optical fibres; Optical fibres (light conducting filaments); Optical fibres being light conducting filaments; Optical fibres for industrial applications; Optical fibres for use in the storage of images; Optical instruments, other than for medical use; Optical networks; Optical plug connectors; Optical receivers; Optical sensors; Optical switches; Optical transmitters; Optical transmitters for use with fibre optic cables; Plastic optical fibres; Pulse code modulation apparatus for transmission via optical fibres; Signal transmitting apparatus utilising optical fibres; Sources of optical beams for communications; Splice boxes for optical fibres; Splice connectors (optical); Telephone cables of optical fibres; Terminals (connectors) for optical fibres; Testing apparatus for checking optical devices; Fiber optic cables; Diagnostic viewing transceivers for evaluating local area network apparatus; Transceivers; Cabling networks (installations) incorporating fibre optic cables; Connectors for fibre optics; Fibre optic apparatus; Fibre optic cables; Fibre optic connectors for telecommunications apparatus; Fibre optic couplings; Fibre optic instruments (not for medical purposes); Fibre optic link installations; Fibre optic modems; Fibre optic panels; Fibre optic receptors; Fibre optic telecommunications apparatus; Fibre optic terminals; Fibre optics; Fibre optics communications apparatus for use with computer work stations; Fibre optics communications installations for use with computers; Fibre optics communications installations for use with electronic apparatus; Audio cable; Cable connectors for use in the data communications industry; Cable installations for the transmission of data; Cable installations for the transmission of voice; Coaxial cable connectors; Coaxial cables; Communications cables; Computer cables; Data transmission cables; Electrical cables for connecting computers; Electrical communications cables; Electronic cables; Telecommunications cable; Telephone cables; Modems for communications networks