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Internal communications systems for businesses, in particular intercom systems (broadcasting systems and press-to-talk intercom systems), operating state indicating systems, control installations, video monitoring installations, acoustic monitoring installations; integrated control stations for acoustic and/or visual monitoring, operating state recording and/or control devices and/or speech transmission; apparatus for recording, transmission or reproduction of sound or images, and of information in the form of electric signals in internal communications systems for businesses; intercom systems, in particular for paging systems, loudspeaker broadcasting systems, lift emergency call systems, counter intercom systems, door and gate intercom systems; telecommunications equipment; table station apparatus; wall station apparatus; door station apparatus; industrial station apparatus; loudspeakers; microphones; video communication systems; video cameras; video monitors; operating state indicating systems, in particular for heating apparatus, air conditioning installations, fire alarm systems, alarm systems, doors, gates, barriers, sluices; monitoring apparatus, electric; control devices, in particular for the control of heating installations, air conditioning installations, alarm systems, roller blinds and/or jalousies, doors, gates, barriers, sluices; data communications installations; remote switching installations; video monitoring installations; alarm installations; electronic installations for access control; magnetic and electronic identity cards for access control; keyboards; commutators, in particular key switches or bell buttons; mains apparatus; switchboards and switching installations; electronic circuits; signalling installations; signalling panels; signalling devices; sirens; temperature indicators; electric door bells; door openers, electric; door catches, electric; paging installations; paging installations; light signalling systems; machine control stations; building management and building security control stations; communications networks, namely inside premises, buildings or businesses, including networks covering all locations, and exclusively in connection with the providing of interfaces to public telecommunications networks operated by others; guiding devices for evacuating buildings; public address systems, in particular music public address systems; computer software, namely for visualising control stations and control station systems; other than luminous position indicators for lifts; all the aforesaid goods exclusively for integration into communications networks inside premises, buildings or businesses, including networks covering all locations, and in connection with the providing of interfaces to public telecommunications networks operated by others