一、泰州市到县骨干传输网络及业务现状 1997年江苏省网络传输中心在全省范围内建设了 SDH 环网,采用双环结构,苏南和苏北各一个环,其中泰州和扬州为两个环的交叉骨干节点,其时,泰州也与下属的四个县级市(泰兴、靖江、姜堰、兴化)间构建了2．5G的 SDH 环网,全网设备都采用法国阿尔卡特公司的设备,核心设备为1664SM,拓朴示意图如图1所示。 First, Taizhou city to the county backbone transmission network and business status In 1997, Jiangsu Province Network Transmission Center in the province built a SDH ring network, the use of double loop structure, south of Jiangsu and northern one of each ring, of which two in Taizhou and Yangzhou At the time, Taizhou also set up a 2.5G SDH ring network with its subordinate four county-level cities (Taixing, Jingjiang, Jiangyan and Xinghua). The equipment of the whole network adopts the French company Alcatel Of the equipment, the core equipment for the 1664SM, topology diagram shown in Figure 1.