上海基本建成１１条用户光缆环网上海光缆环网通信建设渐成规模，覆盖市内主要商业街和经济技术开发区的１１条用户光缆环网已基本建成。从１９９５年开始，上海市电话局就在市区主要商业街和几个经济技术开发区建设用户光缆环同。到目前为止，已有浦东陆家嘴、张江高科技... Shanghai basically completed 11 user optical cable ring network Shanghai optical cable ring network construction has become a scale, covering the city’s main commercial street and the economic and Technological Development Zone of 11 user cable ring has been basically completed. Since 1995, Shanghai Telephone Office has built the same optical cable network in the main commercial streets of the urban area and several economic and technological development zones. So far, there are Pudong Lujiazui, Zhangjiang High-tech ...