This industry comprises (1) establishments primarily engaged in answering telephone calls and relaying messages and (2) establishments primarily engaged in providing telemarketing services, such as promoting products or services by telephone; taking orders by telephone, facsimile, email, or other communication modes; and soliciting contributions or providing information by telephone. Telephone call centers provide these services on behalf of clients and do not own the products or provide the services that they are representing, or they serve other establishments of the same enterprise. Establishments primarily engaged in--