Transit exchanges for the use of switching between local exchanges, electronic telecommunications switching systems composed of routers, computer network switches, modems, Ethernet switches, backbone switches and signal repeaters, routers, network switches, computer software for monitoring network status and updating data stored in network system for data communications, modems, computer software for the use in creating, organizing, editing and delivering textual, graphic audio, video and other data over global computer network, ethernet switches, backbone switches, repeaters, terminal services for telecommunications, multi-carrier telecommunication equipment for accommodating more than one carrier in base station, radar, antennas, transmitters of voice frequencies, telephones, audio cassette players, transmitters of electronic signals, telecommunication equipment for vehicles, namely, transreceivers installed in moving vehicles, portable telecommunication equipment, namely, cellular phones, lasers, not for medical purposes, integrated circuits, smoke detectors applying ultrasonic waves, computers, computer memories, computer game apparatuses, namely, computer game disc, joystick, video output game machine for use with television, modems using electric power line instead of dedicated communication line, TV set top boxes comprising decoders and converters, optical components namely, laser diodes, photo diodes, light emitting diodes, fiber optic cables, optic repeaters for relaying optical signals in optic communication networks, television receivers, receivers of satellite signals, and facsimile machines

Air conditioning apparatus installation and repair, airplane maintenance and repair, burglar alarm installation and repair, communication equipment installation, maintenance and repair including communication wiring, computer hardware installation, maintenance and repair, fire alarm installation and repair, interference suppression in electrical apparatus, industrial machinery installation, maintenance and repair, and office machinery and equipment installation, maintenance and repair

Computer communication services, namely, providing multiplex user access to a global computer information network, cellular telephones communications services, communications services, namely, providing fiber optic network services, satellite communications services, virtual network telecommunications services, communications services, namely, transmission of data by means of a telephone, telegraph, and cable, image communications, namely, video teleconferencing providing information in the field of communications, via telephone and the Internet, rental of telecommunication equipment, including modems and virtual network telecommunications services, namely, providing wireless telecommunications connections to a global computer network

Research and development for new products of telecommunication system