终端复用器

映射复用单元是同步数字序列（SDH）分插复用器和终端复用器的关键部分。

The mapping and multiplexing unit is a very important part of SDH Add_Drop Multiplexer and Terminal Multiplexer .

本文所研究的E1映射复用模块，是2.5G终端复用器（SDH专用分接器）的一个子系统，它所实现的功能就是从STM-1中分接出E1信号以及把E1信号复用进STM-1。

The E1 multiplexer which the dissertation focuses on is a subsystem of the 2.5G terminal multiplexer ( the specific demultiplexer of SDH ) .

SDH设备用来完成传输网络的各种功能，根据完成的功能不同，常见的SDH设备可以分为四种，包括终端复用器TM，分插复用器ADM，再生中继器REG，数字交叉连接设备DXC。

SDH equipment can implement all kinds of function in the transmission network . According to the different function , the common SDH equipments include terminal multiplexer ( TM ), add-drop multiplexer ( ADM ), regenerator ( REG ), data cross connect ( DXC ) .

着重介绍了微波智能业务节点系统软件的设计和实现，其主要功能是将微波无线终端与PDH/SDH/Ethernet多路复用器集成在同一平台之上，提供一个面向SDH骨干网的接口。

This article focuses on the intelligence microwave traffic node system software for the design and realization of its main functions . It is to achieve wireless microwave terminals and PDH / SDH / Ethernet multiplexer integrated on the same platform , and provides for an SDH backbone network interface .