节点交换机

数据转发是骨干节点交换机的核心功能之一，它使其它各软件模块成为一个有机的整体，维护了整个节点交换机IP数据业务的正常通信。

Data forwarding is one of the core functions of the backbone node switch . Coordinated with other software modules , it makes the whole node switch operating well .

将若干个局端交换机通过2M链路按照树形拓扑连接在一起，再把节点交换机就近接入各个局端交换机。

Several bureau will end by 2 M link exchanges in accordance with the tree topology together again , each node switch nearby access switches .

ATM节点交换机51Mb/s线路终端接口电路的设计

The Design for the 51Mb / s Interface Circuit of ATM Node Exchange Machine Terminal Circuits

系统组网一般采取三级结构，一个总局、若干分局和若干节点交换机。

System networking , a general adopt tertiary structure of the number of node number , and switches .

文中描述了面临的新跨越以及跨世纪通信技术进化的总体特征，进而简要介绍了跨世纪全新结构的通信网，以及与之配套的节点交换机。

After the discussion about new occasion , the general characteristics of telecom network evolution towards next century , the paper shows you the complete new architecture of telecom network as well as its switching nodes .

其中包括这些报文的含义，作用以及这些报文是如何在节点与交换机之间进行交互的，又是如何通过这些报文建立节点与交换机之间的信道通路即前面所说的虚链路。

Including the meaning of these messages , the function of these messages and how these messages corporate between the nodes and interact with the switch , but also introduce how to build the virtual channel link through these messages between nodes and switches .

网络骨干节点路由器、交换机安全问题及对策

Network Backbone Node Router , Switchboard Security Problem and Countermeasure

它们分别与端节点、路由器/交换机和因特网上路由表数据库相当。

They are analogous to the end-node , router / switch and routing table database in the Internet , respectively .

较远的通信距离，如10BASE-T网络中节点到集线器或交换机可达100米；

It has long communication distance for example the maximum distance between every node and hub or switching is 100m .

如果访问节点直接连接到交换机，该节点则可以放置在防火墙区域中间。

If the access point is directly connected to the switch , it is located in the inside zone of the firewall .

加上单根光纤的通信速率有多个数量级的提高，网络节点（路由器/交换机）面临着服务质量保障和交换能力的双重挑战。

Moreover , network nodes ( routers and switches ) have faced with challenges both in QoS provisioning and in switching capability when bit-rates in a single fiber has been raised to a few orders of magnitude higher .

在依靠节点设备实现同步的电信网络中，为了应对由于节点交换机不能自动修正时间偏差而导致时间同步水平低下的问题，设计了一个基于分布式算法的时间同步系统。

In order to solve the problem of low time synchronization level in telecommunication network caused by that the node switches can not automatically revise time warping , a time synchronization system is designed based on distributing algorithm .