business telephone systems comprising user stations sold a unit; telephone user stations; telephone attendant consoles; telephone switching units for installation on subscriber premises; telephones; telephone answering machines and parts for the aforementioned goods
business telephone systems comprising user stations sold a unit; telephone user stations; telephone attendant consoles; telephone switching units for installation on subscriber premises; telephones; telephone answering machines and parts for the aforementioned goods
business telephone systems comprising user stations sold a unit; telep...