37
Installation, maintenance and repair of telecommunication systems, including testing of circuits and hardware; installation, maintenance and repair of hubs, bridges, routers, repeaters, modems, multiplexers and terminal servers
38
Telecommunication services; providing communications by computer terminals; message sending; computer aided transmission of messages and images; electronic communications providing electronic transmission of voice, data, facsimile, video and information; internet and intranet services; electronic mail services; electronic order transmission services; facsimile transmission services; telephone communication services; provision and management of telecommunication network system security checks; monitoring and supervision of telecommunication networks
42
Design and development of telecommunication network systems and of computer hardware and software; testing of new telecommunication network systems; computer programming and programming of telecommunication network systems; rental of telecommunication apparatus; advisory and consultancy services relating to telecommunication network systems, including initial consultancy on business and technical requirements