Ключевые слова: abstract, background, business, button, call, calling, close, closeup, communication, computer, concept, conference, connect, connection, contact, dial, dialing, digital, discussion, display, equipment, figure, global, gray, grey, internet, key, keyboard, keypad, macro, mobile, modern, number, office, phone, plastic, receiver, ringing, row, security, service, silver, support, talking, technology, telecommunications, telephone, texture, up, white,