吴江县南邻浙江,东连上海,位于江苏省最南端。县内乡镇业经济十分发达,尤以传统的丝绸工业见长,其中“东方丝绸市场”——盛泽镇早以生产丝绸数量之多、质量之好蜚声海内外。1991年全县外贸收购额达16.1亿元,居全国县级单位第二位。为适应地方经济,特别是外向型经济的发展需要,邮电通信也有了长足的发展:电话交换由人工变为自动,并向程控化发展;信号传输由模拟逐步向数字微波和光 Wujiang County, south of Zhejiang, east of Shanghai, Jiangsu Province is located in the southernmost tip. Township economy is very developed in the county, especially in the traditional silk industry, where “Oriental Silk Market” - Shengze town as early as the production of silk as much as the quality of the world renowned at home and abroad. In 1991, the county’s foreign trade acquisition amounted to 1.61 billion yuan, ranking second in the county-level units. In order to meet the needs of the development of the local economy, especially the export-oriented economy, postal and telecommunications have also made great strides: the exchange of telephone exchanges has been changed from manual to automatic and to the development of programmed control; the signal transmission has gradually shifted from analog to digital microwave and light