telecommunications cables; telecommunication apparatus; telecommunications multiplexers; electrical wires; cable connectors; plug connectors; optical fibre cables; optical fibers; fiber optic networks; fiber optic transceivers; fiber optic couplers; protective sheaths for fibre optical cables; junction sleeves for fibre optics; polarization-maintaining optical fibers; fiber-to-the-home [FTTH]; fibre optics; fibre interconnection cable; optical fibre connectors; optical fiber connectors; data communications equipment; data cables; optical inspection apparatus for industrial use; communications cables; communications systems; communications equipment; testing and quality control devices