Ключевые слова: answer, black, business, businessman, button, call, center, closeup, communicate, communication, concept, connection, contact, conversation, customer, device, dial, dialing, finger, global, hand, help, helpline, holding, interview, keyboard, keypad, landline, line, making, male, man, network, number, operator, personal, phone, receiver, reception, service, sos, support, technology, telecommunication, telephone, using,