电信专业英英词典D-5

　　DCE

　　data circuit terminating equipment

　　DCP

　　digital communications protocol²

　　DCS

　　digital cross-connect system

　　DDD

　　direct distance dialing

　　DDN

　　Defense³ Data Network

　　Digit¹ L

　　Digital L is another amplitude⁴ condition that represents a binary⁵ digit 0. See binary digit or bit.

　　Digital Carrier Systems

　　Digital Carrier Systems are carrier systems for digital signals that uses regenerative versus⁶ linear repeaters and time division multiplexing.

　　Digital Cross Connect System (DCS)

　　DCS is a new generation of switching/multiplex equipment that permits per-channel DS0 (64 kbps) electronic cross-connection from one T1 transmission facility to another, directly from the constituent⁷ DSl signals. Commonly referred to as "DACS" (digital access and cross connect system), although this is a trademark⁸ of AT&T.

　　Digital Signal

　　A digital signal is a signal (electrical or otherwise) in which information is carried in a limited number of different (two or more) discrete⁹ states. The most fundamental and widely used form of the digital signal is binary, in which one amplitude condition represents a binary.

　　Digital Termination Service (DTS)

　　DTS is a service provided by some carriers permitting opera tors of private networks to use digital microwave equipment to gain access to carrier net works. The FCC has allocated¹⁰ a special microwave band for DTS.

1 digit   

n.零到九的阿拉伯数字，手指，脚趾

参考例句：

• Her telephone number differs from mine by one digit.她的电话号码和我的只差一个数字。
• Many animals have five digits.许多动物有5趾。

2 protocol   

n.议定书，草约，会谈记录，外交礼节

参考例句：

• We must observe the correct protocol.我们必须遵守应有的礼仪。
• The statesmen signed a protocol.那些政治家签了议定书。

3 defense   

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。

4 amplitude   

n.广大；充足；振幅

参考例句：

• The amplitude of the vibration determines the loudness of the sound.振动幅度的大小决定声音的大小。
• The amplitude at the driven end is fixed by the driving mechanism.由于驱动机构的作用,使驱动端的振幅保持不变。

5 binary   

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。

6 versus   

prep.以…为对手，对；与…相比之下

参考例句：

• The big match tonight is England versus Spain.今晚的大赛是英格兰对西班牙。
• The most exciting game was Harvard versus Yale.最富紧张刺激的球赛是哈佛队对耶鲁队。

7 constituent   

n.选民；成分，组分；adj.组成的，构成的

参考例句：

• Sugar is the main constituent of candy.食糖是糖果的主要成分。
• Fibre is a natural constituent of a healthy diet.纤维是健康饮食的天然组成部分。

8 trademark   

n.商标；特征；vt.注册的…商标

参考例句：

• The trademark is registered on the book of the Patent Office.该商标已在专利局登记注册。
• The trademark of the pen was changed.这钢笔的商标改了。

9 discrete   

adj.个别的，分离的，不连续的

参考例句：

• The picture consists of a lot of discrete spots of colour.这幅画由许多不相连的色点组成。
• Most staple fibers are discrete,individual entities.大多数短纤维是不联系的单独实体。

10 allocated   

adj. 分配的 动词allocate的过去式和过去分词

参考例句：

• The Ford Foundation allocated millions of dollars for cancer research. 福特基金会拨款数百万美元用于癌症研究。
• More funds will now be allocated to charitable organizations. 现在会拨更多的资金给慈善组织。