Optical, electrotechnical and electronic apparatus and devices, namely, electrical devices for recording, emission, transmission, reception, reproduction and processing of sounds, signals, characters and images except for photographic, cinematographic and radiographic devices, namely, optical transmitters, optical receivers, optical data links, and digital transmitters; electrical and electronic devices for recording, processing, sending, transmission, switching, storage and output of messages and data, namely, computer servers, multiplexers, computer terminals, computer interface boards, and computer monitors; communications computers, software for use with telecommunication technology; optical, electrotechnical and electronic communications equipment pertinent to telephone switching and telephone communications technology, namely, telephones, videophones, voice boxes, dialing devices, domestic telephone systems, private automatic branch exchanges; devices for voice recognition; telecommunication networks consisting of switching and transmission devices, individual modules and components of such devices, namely, power supply units; transmission media, namely, telecommunication cables and optical fibers sold as a component of fiber optical cables and pertinent connection elements; electrical and electronic parts of all the apparatus and devices mentioned above, each sold as a unit with the respective apparatus or device; electrical and electronic installations composed of a combination of the aforementioned apparatus and devices, namely, automatic switching apparatus, telecommunication towers, and telecommunication line integrity testing apparatus

Installation, mounting, maintenance and repair of telecommunication devices, systems and telecommunication network hardware

Renting of telecommunication appliances and devices and of telecommunication networks

Training in the setting-up and operation of telecommunication systems and telecommunication networks

Technical development and project-design of telecommunication and information processing services and facilities and telecommunication networks; technical planning and project-design of telecommunication and data processing systems, telecommunication networks and pertinent facilities and parts; development, generation and renting of data processing programs for telecommunication systems for others