Speak with others using clear and professional language, and answer telephones using appropriate etiquette. https://cirandas.net/ezalba/blog/%EB%B0%A4%EC%95%8C%EB%B0%94-%EB%8B%A8%EA%B8%B0%EB%A1%9C-%EC%97%AC%EB%A6%84%EC%B2%A0-%EC%86%8C%EB%93%9D%EC%9D%84-%EB%8A%98%EB%A6%AC%EB%8A%94-%EB%B0%A9%EB%B2%95
