电信专业英英词典D-4
D type Channel Bank
A D type channel bank is channel termination equipment used for combining (multiplexing) individual analog 1 channel signals on a time division basis. D type channel banks provide interfaces 3 for "n" analog signal inputs 5. Each analog input 4 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
Defense 6 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 modem 7 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 premises 8 equipment (CPE ) to carrier networks. A hardware device providing an interface 2 between a digital line and a unit of data terminal equipment. DSUs provide transmit and receive control logic 9, synchronization 10 and timing 11 recovery across data circuits. DSUs may also convert ordinary binary 12 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
Decibel 13 (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 generator 14.
- 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。
- 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。
- 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。
- 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。
- 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
- 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。
- 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。
- 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。
- 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。
- 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
- 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。
- 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。
- 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。