Computer network hubs; LAN switches; wireless LAN; switch routers; wide area network (WAN) routers; Internet protocol (IP) PBX; Internet protocol (IP) phones; modules including intrusion detection system (IDS), intrusion prevention system (IPS), firewall and virtual private network (VPN); network access servers; software for network management system; network servers; computers; computer printers; computer monitors; personal digital assistants (PDAs); semi-conductors; television sets; cellular phones; facsimile machines; camcorders; cash registers; dry cells; storage batteries; battery chargers; optical fibre cables; USB (universal serial bus) cables; telecommunications cables; electric flat irons; amusement apparatus adapted for use with television receivers only; video-telephones; telephones; video tape recorders; adaptors; headphones; microphones; earphones; DVD players; MP3 players; audio speakers; compact disc players; cathoderay tubes