上海本地电话网,历经数年的超常规发展,已成为我国第一大本地电话网。 1991年,上海电话交换机总容量仅83.68万门。 1992年,突破100万门,成为我国大陆上第一个拥有百万门公用电话交换网的城市。 1994年9月,上海交换机容量在全国各人城市中率先突破200万门,年末全网总容量达232多万门,程控化比例 Shanghai local telephone network, after years of extraordinary development, has become China’s largest local telephone network. In 1991, the total capacity of Shanghai telephone exchange was only 836,800. In 1992, it exceeded 1 million and became the first city in mainland China to have one million public switched telephone networks. In September 1994, the capacity of Shanghai switch exceeded 1 million in the cities of various cities nationwide. By the end of the year, the total capacity of the entire network reached more than 2.23 million and the proportion of programmed control