Scientific instruments for measuring or evaluating the parameters of optical, acoustic, electrical, electronic and telecommunication equipment; electrical and electronic instruments, electrical and electronic components, communication equipment, computer based communication equipment, apparatus for signalling, apparatus for remote control, coin-freed or code-freed communications equipment, telephones, data entry terminals and computer terminals; line transmission equipment, repeaters, regenerators, electric and communication cables, optical fibres, optical fibre cables, optical fibre systems and parts and components thereof included in this class; telephone and telegraph equipment, facsimile equipment, radio equipment, television equipment, microwave radio equipment, frequency division transmission and reception equipment, digital communication equipment, time division transmission and reception equipment, digital switching equipment, pulse code modulation equipment, telephony, data, video, teletex and message transmission equipment and parts therefor included in this class; multiplexers, demultiplexers, inverters, converters, regulators, video display units, telephones, PABX, intelligent terminals, computers, computer peripherals, radio telephones, data systems, radio pagers, intercommunication systems and parts and components thereof, lasers, photo diodes, optical detectors, all being goods included in class 9