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电信专业英英词典D-4

时间：2006-08-18 16:00:00

（单词翻译:单击）

　　D type Channel Bank

　　A D type channel bank is channel termination equipment used for combining (multiplexing) individual analog1 channel signals on a time division basis. D type channel banks provide interfaces3 for "n" analog signal inputs5. Each analog input4 signal is directed to a codec for en coding to PCM samples. A part of a Tl carrier system.

　　DACS

　　digital access & cross-connect system

　　DARPA

　　Defense6 Advanced Research Projects Agency

　　Data Compression

　　Data compression is a technique that removes redundancy in transmitted bit patterns to reduce transmission rates by 20% to 200%. For example, a modem7 designed to send and receive data at 1200 bps without data compression may be capable of supporting 2400 bps with data compression, using the same network analog voice-grade channel.

　　Data Service Units (DSU)

　　DSUs are channel service units (CSI's) and data service units (DSUs) are required to connect digital customer premises8 equipment (CPE ) to carrier networks. A hardware device providing an interface2 between a digital line and a unit of data terminal equipment. DSUs provide transmit and receive control logic9, synchronization10 and timing11 recovery across data circuits. DSUs may also convert ordinary binary12 signals generated by CPE to special bipolar signals. Bipolar signals are designed specifically to facilitate transmission at up to 1.544 Mbps rates over UTP cable, a media originally intended for 3 kHz, voice bandwidth signals. See Channel Service Units (CSU).

　　Data Terminal Equipment (DTE)

　　DTE is any device that can send data, receive data or perform both functions. (Note: sometimes DTE implies digital terminal equipment, a type of CPE used with digital Service——see CSU and DSU.)

　　DB Loss

　　Decibel13 (dB) is a unit of measure of signal strength, usually the relationship between a transmitted signal and a standard signal source. Loss is measured when the signal received across a communication circuit is less than what was transmitted by the signal generator14.


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1 analog yLDyQ     
n.类似物，模拟
参考例句：
  • The analog signal contains high-frequency video information,which helps make up the picture.模拟信号包括有助于构成图像的高频视频信息。
  • The analog computer measures continuously,without proceeding step by step.模拟计算机不是一步一步地进行，而是连续地进行量度。
2 interface e5Wx1     
n.接合部位，分界面；v.(使)互相联系
参考例句：
  • My computer has a network interface,which allows me to get to other computers.我的计算机有网络接口可以与其它计算机连在一起。
  • This program has perspicuous interface and extensive application. 该程序界面明了，适用范围广。
3 interfaces ad63a35ea2ac8a42233e5ac6cb325d34     
界面( interface的名词复数 )； 接口（连接两装置的电路，可使数据从一种代码转换成另一种代码）； 交界； 联系
参考例句：
  • If the class needs to be reprogrammed, new interfaces are created. 如果class需要重新程序设计，新的interfaces创建。
  • Interfaces solve this problem of evolving code. Interfaces解决了代码升级的问题。
4 input X6lxm     
n.输入(物)；投入；vt.把(数据等)输入计算机
参考例句：
  • I will forever be grateful for his considerable input.我将永远感激他的大量投入。
  • All this information had to be input onto the computer.所有这些信息都必须输入计算机。
5 inputs a8aff967e1649a1c82ea607c881e8091     
n.输入( input的名词复数 )；投入；输入端；输入的数据v.把…输入电脑( input的第三人称单数 )
参考例句：
  • Uncheck the inputs checked for optimization in the previous stage. 不测试那些已经测试过的优化了的以前步骤的inputs.（变量参数）。 来自互联网
  • Just in case, save in a file the inputs obtained at the previous stage. 以防万一，保存以前步骤获得的inputs（变量参数值）到一个文件中去。 来自互联网
6 defense AxbxB     
n.防御，保卫；[pl.]防务工事；辩护，答辩
参考例句：
  • The accused has the right to defense.被告人有权获得辩护。
  • The war has impacted the area with military and defense workers.战争使那个地区挤满了军队和防御工程人员。
7 modem sEaxr     
n.调制解调器
参考例句：
  • Does your computer have a modem?你的电脑有调制解调器吗？
  • Provides a connection to your computer via a modem.通过调制解调器连接到计算机上。
8 premises 6l1zWN     
n.建筑物，房屋
参考例句：
  • According to the rules,no alcohol can be consumed on the premises.按照规定，场内不准饮酒。
  • All repairs are done on the premises and not put out.全部修缮都在家里进行，不用送到外面去做。
9 logic j0HxI     
n.逻辑(学)；逻辑性
参考例句：
  • What sort of logic is that?这是什么逻辑？
  • I don't follow the logic of your argument.我不明白你的论点逻辑性何在。
10 synchronization DgDzwV     
n.同一时刻；同步；使时间互相一致；同时性
参考例句：
  • Communication record: the function supports synchronization record during the communication process. 通话录音：支持通话过程的同步录音。 来自互联网
  • Synchronization is an important problem of digital audio watermarking. 同步性是数字音频水印的一个重要问题。 来自互联网
11 timing rgUzGC     
n.时间安排，时间选择
参考例句：
  • The timing of the meeting is not convenient.会议的时间安排不合适。
  • The timing of our statement is very opportune.我们发表声明选择的时机很恰当。
12 binary jybzWZ     
adj.二，双；二进制的；n.双(体)；联星
参考例句：
  • Computers operate using binary numbers.计算机运行运用二进位制。
  • Let us try converting the number itself to binary.我们试一试，把这个数本身变成二进制数。
13 decibel Wxxxq     
n.分贝(音量的单位)
参考例句：
  • The noise pollution reached a high decibel level.噪音污染达到了很高分贝。
  • In sound we use the decibel scale.在声学中我们采用分贝标度。
14 generator Kg4xs     
n.发电机，发生器
参考例句：
  • All the while the giant generator poured out its power.巨大的发电机一刻不停地发出电力。
  • This is an alternating current generator.这是一台交流发电机。