Ключевые слова: background, black, blue, business, button, call, close, communication, computer, connection, contact, desk, device, digital, display, electronics, hand, hook, internet, ip, isolated, key, keyboard, keypad, laptop, lcd, line, man, modern, number, object, off, office, pbx, person, phone, pick, receiver, service, support, technology, telephone, voice, voip, white, woman,