Signal generators, signal collectors, signal transmitters, signal carriers, signal receivers, signal recorders, signal interpreters, signal processors and signal converters; data generators, data collectors, data transmitters, data carriers, data receivers, data recorders, data interpreters, data processors and data converters; data storage apparatus; data communications apparatus, data communications installations, data communications receivers and data communications software; data and signal encryption and decryption apparatus and software; computer programs for the generation, transmission, reception, recording, interpretation, processing and conversion of signals and data; connectors and adaptors for powerlines, electrical cables, data cables, fibre optic cables, the ethernet; connectors for the interface between powerlines, electrical cables, date cables, fibre optic cables, wireless networks and the ethernet; fibre optic apparatus, fibre optic instruments (not for medical purposes), fibre optic modems, fibre optic receptors, fibre optic telecommunications apparatus, fibre optic terminals; interfaces for computers and for telecommunications; interface units for electronic apparatus; data packet switching apparatus and networks