有很长一段时间，电信业被大多数国家认为是具有天然垄断性质的产业。自本世纪70年代末起，美国开始在电信业的国际和州际长途电话业务中引入竞争，自此以后，各国电信业引入竞争成为一种世界性潮流。到目前为止，不仅发达国家的电信业已经基本建立起竞争机制，一些中等发达国 For a long time, the telecom industry was considered by most countries to be a natural monopoly industry. Since the late 1970s, the United States has begun to introduce competition in international and national long-distance telephone services in the telecommunications industry. Since then, the competition in various countries in the telecommunications industry has become a worldwide trend. So far, not only the telecommunications industry in developed countries has basically established a competition mechanism, some medium-developed countries