FTTH 解决方案演示文档.ppt

基础网络的划分 基于PON的线路分为以下五部分： 1、光纤终端子系统 2、引入光缆子系统 3、配线光缆子系统 4、馈线光缆子系统 5、中心机房子系统 最新. * 3 Innovation Then NTT developed 3 step improvements plan for solving previous issues. This is a over view. Regarding to phase 1, which is to replace fusion with mechanical splice with new drop cable.(Fiberlok简单,新的下线皮线光缆) Regarding to phase 2, which is to develop new field assemble connector that NTT-West plans to apply at NID(cabinet) as well as wall outlet.现场制作,可插拔式活动光接头,目的一是NID分界和测试方便,容易更换光跳线),并减少一个接续点 1) For NID(Cabinet), here would be demarcation outside house. Connectivity is allow them to permit network test, customer owns all house wiring like as PSTN and easy to accept service cancellation. This contribute to improve maintenance ability for NTT. 2) For wall outlet application, customer replaces broken in-house wiring. Because Teleco controls interface point by SC and shallow socket fits in wall outlet box, NTT selected ferrule connector design for this program. Regarding to 3rd. phase, NTT has a plan to implement new tight bend radius fiber and cable that enable to reduce a chance to fiber breaks as well as small form factor housings. This also contribute to improve maintenance ability for NTT. This picture shows Japan style drop cable. NTT also introduced this specific design drop as well as indoor cable. Since cable inside tension member made from FRP(fiber reinforced plastic), there is nothing about dielectric issue. Eliminating grounding process contributed to reduce deployment cost as well. 8字形皮光缆,1,2,4芯带,8芯(2个4芯带),用手扒开不需开剥工具 弯曲半径达到15mm Let’s move to the next which is my key message today which is Cost of Development with Innovative Solutions! According to a series of innovative developments, FTTH deployment cost would be same level of copper drop cost under current constriction volume. 2002年到2004年FTTH成本下降和金属布放成本接近 How? 。。。在网络拓扑图中，网络要素之间画一条线是很容易的，但在实施中这条线上到底发生了什么，是我们最关心的，特别是在最后100米上。。。 最新. 第二阶段：用于