智能光网是20世纪出现、本世纪初才被电信运营商开始大量运用的光纤通信技术。世界上第一家大规模建设智能光网络的是美国AT＆T公司。近年来,我国信息产业加大了研制开发智能光网络的投入,开始了试验网的建设。专家们认为:智能光网络将成为未来几年光通信发展的重要方向,将给电缆行业提供难得的市场机遇。 自动交换光网络(ASON)是智能光网络的主要模式之一,一般由DWDM(密集波分复用)组成的光传送网(OTN)加上光交换机组成。在由DWDM组成的网状网主要节点设置具有数百Gbit/s交换能力的光交换机,组成ASON的核心层。按照我国光纤通信的技术体系,光交换机最小颗粒度可以设定为155Mbit/s,网络节点接口(NNI)可以任选STM—1/STM—4/STM—16/STM-64,用户网络接口(UNI)用于连接SDH(同步数字系列)、ATM(异步转移模式)、以 Intelligent optical network is the 20th century, appeared early this century, telecom operators began to make extensive use of optical fiber communication technology. The world’s first large-scale construction of intelligent optical network is the United States AT & T. In recent years, China’s information industry has increased research and development of intelligent optical network input, began the construction of experimental network. Experts believe that: Intelligent Optical Network will become the next few years the development of optical communications an important direction, will provide the cable industry a rare market opportunity. Automatic Switched Optical Network (ASON) is one of the main modes of intelligent optical network. It is generally composed of optical transport network (OTN) composed of DWDM (Dense Wavelength Division Multiplexing) and optical switch. An optical switch with hundreds of Gbit / s switching capacity is set up on the main node of the mesh network composed of DWDM to form the core layer of ASON. According to the technical system of optical fiber communication in our country, the minimum granularity of the optical switch can be set to 155 Mbit / s, and the network node interface (NNI) can optionally have STM-1 / STM-4 / STM-16 / STM- UNI) Used to connect SDH (Synchronous Digital Hierarchy), ATM (Asynchronous Transfer Mode), with