Ключевые слова: analogic, background, bell, borders, business, cable, call, charger, communications, copper, design, digital, digitalization, disk, electricity, elegance, elegant, equipment, frequency, gray, green, handset, hardware, industry, interconnection, line, mechanic, microphone, modern, multifrequency, nets, object, obsolescence, obsolete, old, operator, optical fiber, phone, plug socket, retro, signal, talk, technology, telecommunications, telephone, vintage, white, wired, world,