6.同步数字系列
同步数字系统：synchronous digital hierarchy
国际标准：international standard
信号格式：signal format
网络节点接口：network node interface
支路信号：tributary signals
数字交叉连接：digital cross-connection
网络管理：network management
网络维护：network maintenance
网络运营者：network operators
传输速率：transmission rate
支路映射：tributary mapping
灵活性：flexibility
用户业务：subscriber services
覆盖层：overlay levels
制造商：manufacturer
同步传输帧：synchronous transmission frame
线路终端复用器：line terminal multiplexer
分插复用器：add-drop multiplexer
再生中继器：regenerator
灵敏度：sensitivity
虚容器：virtual container
成帧字节：framing bytes
段开销：section overhead
端到端传输：end-to-end transmission
误码监视：error monitoring
信号处理节点：signal processing nodes
净负荷：payload
指针：pointer
同步传输系统：synchronous transmission system
覆盖nni的标准：the standard covering the NNI
国际标准接口：the international standard interface
直接同步复用：direct synchronous multiplexing
灵活的通信联网：flexible telecommunication networking
点对点的传输技术：point-to-point transmission technology
先进的网络管理：advanced network management
不同厂家提供的设备：the equipment supplied by different manmufacturers
SDH提供的灵活性：the flexibility provided by SDH
同步复用设备的运营者：operator of synchronous multiplexers
电信联网：telecommunication networking
支路信号：tributary signals
维护能力：maintenance capabilities
统一的电信网络基础结构：unified telecommunication network infrastructure
组件：building blocks
终端复用器：terminal multiplexer
贯通方式：through-mode fashion
同步数字交叉链接：synchronous DXC
可变带宽：arying bandwidth
各个支路信号：individual tributary signals
传输系统：transport system
光载体：optical carrier
二维图形：2-dimensional map
传输次序：the order of transmission
7.波分复用
对光特性的理解：the understanding of the property of light
基本重要性：the fundamental important
想象今天的通信系统：to imagine the communication system of today
光的高速公路：the highway of light
巨量的信息：the massive amount of information
采用通信新技术：to adopt new communication technology
大量的视频信息：the large amounts of video information
波分复用：the wave divide multiplexing
只发送单个波长：to send only one wavelength
传输大量的波长：to transmit a large amount of wavelength
无差错传输：the error-free transmission
自愈特性：the self-healing propertys
直接接入光网络：to access directly to the optial network
视频信息：the video information
导致WDM革命的主要进展：the major advance that led to the revolution
光放大器的发明：the invention of the optical amplifier
下一段光纤：the next span of fiber
提高所有波长信号的功率：to boost the signal power of all wavelength
在光放大器方面的进展：the advances in optical amplifier
增益均衡技术的发展：the development of gain equalization techniques
多波长传输：the multiple-wavelength transmission
无线系统的增长：the growth of various application
各种各样的业务：the wide various application
处理各种业务类型：to handle various types of traffic
全光交叉连接：the all-optical cross-connect
8.寻呼系统的发展
通信手段：communication means
被叫人：called person
紧急通信：urgent communications
移动电话网：mobile telephone network
电话交换台：telephone switchboard
寻呼业务：paging service
电子电路：electronic circuitry
无线传输：wireless transmission
无线发射机：wireless transmitter
个人代码：personal codes
服务区：service area
单向通信：one-way communication
寻呼用户：paging users
顾客：customer
技术进步：technological progress
系统的效率：efficiency of the system
专用的无线网络：dedicated wireless network
终端设备：terminal equipment
全球覆盖：global coverage
无线增益：gain of the antenna
空间站：space station
通信网络的运行：the operation of a communication network
有线的和移动的电话网络：the wired and mobile telephone network
光和声音的信号装置：optical and acoustical signaling devices
本地电话交换台的接线员：the operator of a local telephone switchboard
第一代寻呼系统：the first generation of paging system
利用无线传输的寻呼系统：the paging system using wireless transmission
专用的无线接收机：the dedicated radio receiver
社会和经济效益：social and economic advantages
电子电路的小型化：the miniaturization of electronic circuitry
价格效率比：cost efficiency
小型无线电接收机：the miniature radio receiver
显示能力：display capability
全球覆盖：global coverage
空间站的天线增益：the space station antenna gain
地球同步轨道卫星：geostationary orbit satellite
用户终端：user terminal
9.蜂窝式移动电话系统
蜂窝式移动电话：cellular mobile telephone
服务性能：services performance
频谱：frequency spectrum频带：frequency band
微处理器：microprocessor移动手机：mobile unit
广播业务：broadcast servise天线：antenna
子系统：subsystems移动用户：mobile subscriber
服务能力：service capability
利用率：utilization带宽：bandwidth
单边带：single-sideband扩频：spread spectrum
大规模集成电路：large scale integrated circuits
蜂窝点：cellular site蜂窝交换机：cellular switch
无线机架：radio cabinet呼叫处理：call processing
频谱利用率：frequency spectrum utilization
有限的指定频带：the limited assigend ferquency band   服务区：servise area
复杂的特性和功能：complicated features and functions
大规模集成电路技术：large-scale integraesd circuit technology
试验性的蜂窝系统：developmental cellular system
中央协调单元：central coordinating element
蜂窝管理：cellular administration
传统移动电话的运行限制：operational limitiation of conventional mobile telephone system
有限的服务能力：limitied service capability
无线通信行业：radio communcation industry
可用的无线电频谱：available radio frequency spectrum
所分配的频带：the allocated frequency band
移动收发信机：mobile transceiver
技术上的可行性：techological feasibility
严格的频谱限制：severe spectrum limitations
调频广播业务：FM broadcasting services
传播路径衰耗：propagration path loss
多径衰耗：multipath fading
电话公司地方局:telephone company zone offices