Little size , logical frame , good optic and mechanical speciality . used for main lashup optical fiber , access the lead indoor optical fiber of the network , sound machine , data transmission , oas , instrument optical fiber 可以用于干线应急光缆接入网的引入光缆室内光缆音响设备数据传输智能大楼连接办公自动化机盘设备用光缆。
It has the good characteristics such as broader band , lower cost , easier used and upgraded , lower maintenance charge , and according to this , it will be the best choice of the access network 它综合了无源光网络( pon )技术和以太网技术二者的优点,以其高带宽、低成本、易使用、易升级、低维护费用的优良特性成为接入网的最佳选择。
The china telecom has completed third expansion of chinanet . as a result , the entire chinanet ranging from backbone network , municipal area network to access network has been put on the basis of broadband and bandwidth of its international gateway has reached 6g 中国电信完成了chinanet三期扩容，实现了chinanet从骨干网到城域网、接入网的全程宽带化，国际出口带宽增加至6g 。
The introduction of the v5 standard interface in exchange realizes the digital link between the local exchange and access network , makes the digital channel connect with the subscribers directly or more closely , and finally achieves the digital access network V5标准接口的引入使得接入网与本地数字交换机直接采用数字相连，使数字通道靠近或直接连接到用户，实现了接入网的数字化。
In this paper , firstly , tmn and snmp are studied . then the structure and the access mode of the broadband hfc access network are summarized . at last , a broadband hfc access network management system based on snmp is introduced 由此，本文研究了tmn网管体系结构、 snmp网管协议，分析总结了宽带hfc接入网的网络结构和接入方式，最后介绍了一种基于snmp的宽带hfc接入网网管系统的实现。
Chapter 2 analyses the structure of the modern catv network , summarizes the two access modes of broadband hfc access network , and proposes the broadband hfc access network management system be based on tmn and snmp 第二章首先分析了现代有线电视网络结构，重点总结了宽带hfc接入网的两类接入方式，接着分析并提出宽带hfc接入网网管系统适合架构于tmn网管体系结构之中，适合采用snmp网管接口。
Following the broadband service of audio and video to be provided , the recent method of narrowband access does not adapt to the requirement of the real - time service . so increasing the access speed will be emphasis to build information superhighways 随着internet上话音、视频等宽带服务的发展，目前的窄带接入方式已经不能满足人们对实时性的要求，提升接入网的速度是形成信息高速公路的关键所在。
The ga that this paper designed can deal with these problems well because of its simplicity , robustness and high searching efficiency . this paper first describes the conception of access network and passive optical network . then we introduce the architectur of poan 在简单介绍了接入网的基本概念、地位和作用后，分析了无源光接入网的基本概念、分类、工作原理、相关国际标准、典型的网络架构和拓扑结构。
Epon system is a kind of passive optical network based on ethernet . epon has become one of the best technologies in the next generation broadband access network because it has many virtues , such as easy to upgrade and operation , low cost and high bandwidth Epon是一种基于以太网的无源光网络,结合了以太网的广泛性、易于升级和维护的优点以及光纤网的低成本大容量,成为下一代宽带接入网的最佳候选技术之一。
Based on the popularity and low cost with high bandwidth of ethernet and the large capacity of fibre network , a technology named epon , which is a positive optic network based on ethernet , come to be one of the best choices for next generation broadband access networking 借助以太网的普遍性及其低成本高带宽的优点和光纤网的低成本大容量性质,一种基于以太网的无源光网络epon成为下一代宽带接入网的最佳候选技术之一。
