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同步數(shù)字系統(tǒng)：synchronous digital hierarchy

國際標準：international standard

信號格式：signal format

網(wǎng)絡(luò)節(jié)點接口：network node interface

支路信號：tributary signals

數(shù)字交叉連接：digital cross-connection

網(wǎng)絡(luò)管理：network management

網(wǎng)絡(luò)維護：network maintenance

網(wǎng)絡(luò)運營者：network operators

傳輸速率：transmission rate

支路映射：tributary mapping

靈活性：flexibility

用戶業(yè)務(wù)：subscriber services

覆蓋層：overlay levels

制造商：manufacturer

同步傳輸幀：synchronous transmission frame

線路終端復(fù)用器：line terminal multiplexer

分插復(fù)用器：add-drop multiplexer

再生中繼器：regenerator

靈敏度：sensitivity

虛容器：virtual container

成幀字節(jié)：framing bytes

段開銷：section overhead

端到端傳輸：end-to-end transmission

誤碼監(jiān)視：error monitoring

信號處理節(jié)點：signal processing nodes

凈負荷：payload

指針：pointer

同步傳輸系統(tǒng)：synchronous transmission system

覆蓋NNI 的標準：the standard covering the NNI

國際標準接口：the international standard interface

直接同步復(fù)用：direct synchronous multiplexing

靈活的通信聯(lián)網(wǎng)：flexible telecommunication networking

點對點的傳輸技術(shù)：point-to-point transmission technology

先進的網(wǎng)絡(luò)管理：advanced network management

不同廠家提供的設(shè)備：the equipment supplied by different manufacturers

提供的靈活性：the flexibility provided by SDH

同步復(fù)用設(shè)備的運營者：operator of synchronous multiplexers

電信聯(lián)網(wǎng)：telecommunication networking

支路信號：tributary signals

維護能力：maintenance capabilities

統(tǒng)一的電信網(wǎng)絡(luò)基礎(chǔ)結(jié)構(gòu)：unified telecommunication network infrastructure

組件：building blocks

終端復(fù)用器：terminal multiplexer

貫通方式：through-mode fashion

同步數(shù)字交叉鏈接：synchronous DXC

可變帶寬：varying bandwidth

各個支路信號：individual tributary signals

傳輸系統(tǒng)：transport system

光載體：optical carrier

二維圖形：2-dimensional map

傳輸次序：the order of transmission