Ключевые слова: background, black, business, cable, call, closeup, communicate, communication, communications, concept, concepts, connect, connection, contact, conversation, cord, customer, device, dial, electronic, equipment, global, hand, handset, hotline, isolated, line, listening, network, object, office, old, phone, plastic, push, receiver, service, talk, talking, technology, telecommunication, telecommunications, telephone, voice, white,