电信专业英英词典L-2

　　Loop Length

　　Typically, loop length is a complete electrical circuit; the pair of wires that winds its way from the central office to the telephone set or system at the customer's premises¹.

　　Loop Signaling

　　Loop signaling is a method of signaling over dc circuit paths that utilizes² the metallic³ loop formed by the line or trunk conductors and terminating circuits.

　　Loop Start

　　Loop start is a supervisory signal given at a telephone or PBX in response to closing the loop's DC current path.

　　Loop Transmission Facilities

　　Loop transmission facilities connect switching systems to customer premises equipment throughout the serving area. A loop is a transmission path between a customer's premises and a LEC central office. The most common form of loop, a pair of wires, is also called a line. A loop" can be derived⁴ from digital loop carrier (DLC) systems also referred to as subscriber⁵ loop carrier (SLC) systems.

　　LSI

　　large-scale integrated circuit

　　LAN - Local Area Network. A data communications network that lies within a limited space (such as a building) to connect telephone lines, computers, modems⁶, printers, etc.

　　Local Access and Transport Area (LATA) - Geographical⁷ boundaries within which local telephone companies may provide local telephone services (and some limited toll⁸ services). There are 184 LATAs in the United States.

　　Leased Line - A phone line dedicated⁹ for exclusive use from one location to another. High speed connections require a leased line.

　　Lifeline/Link-Up Program - A Federal program designed to provide telephone service to the poor and elderly at a reduced cost to assure they can be reached in case of an emergency.

　　Link - See Hypertext Link

　　LISTSERV - Mailing lists that act as newsgroups.

　　Local Number Portability Charge (LNP) - Allows a customer to keep the same phone number and "port" it over to another service provider. This is new to wireless¹⁰. The terms number portability (NP) and local number portability (LNP) are often used interchangeably.

　　Local Number Portability Charge (LNP) - This charge may appear on the local portion of a phone bill if you live in an area where local number portability is provided. This fixed¹¹ monthly charge allows local telephone companies to recover certain costs for providing “portability” to its customers. Local telephone companies may continue to assess this charge on their customers’ telephone bills for five years from the date the local telephone company first began itemizing the charge on the bill. This is not a tax.

　　Login Name - The unique account name used to access a computer system. Also called user ID or user name, it is a way people identify themselves to their online service or Internet access provider.

1 premises   

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。

2 utilizes   

v.利用，使用( utilize的第三人称单数 )

参考例句：

• One highly successful approach utilizes a triplet aspheric lens array. 一种很成功的方法是利用一个三合非球面透镜阵列。 来自辞典例句
• The first utilizes a blend of finely ground ceramic powders. 第一种用的是一种磨细的陶瓷粉末混合物。 来自辞典例句

3 metallic   

adj.金属的；金属制的；含金属的；产金属的；像金属的

参考例句：

• A sharp metallic note coming from the outside frightened me.外面传来尖锐铿锵的声音吓了我一跳。
• He picked up a metallic ring last night.昨夜他捡了一个金属戒指。

4 derived   

vi.起源；由来；衍生；导出v.得到( derive的过去式和过去分词 )；（从…中）得到获得；源于；（从…中）提取

参考例句：

• Many English words are derived from Latin and Greek. 英语很多词源出于拉丁文和希腊文。 来自《简明英汉词典》
• He derived his enthusiasm for literature from his father. 他对文学的爱好是受他父亲的影响。 来自《简明英汉词典》

5 subscriber   

n.用户，订户；（慈善机关等的）定期捐款者；预约者；签署者

参考例句：

• The subscriber to a government loan has got higher interest than savings. 公债认购者获得高于储蓄的利息。 来自辞典例句
• Who is the subscriber of that motto? 谁是那条座右铭的签字者？ 来自辞典例句

6 modems   

n.调制解调器( modem的名词复数 )

参考例句：

• Yes, floppy day, as did 9600 baud dial up modems. 是的，当时软件是最主要的工具，还有9600波特拨号调制解调器。 来自互联网
• Extra settings for configuring BAD modems that cannot identify proper disconnect tone. 额外的设置，配置不好的调制解调器不能确定适当的断开的语调。 来自互联网

7 geographical   

adj.地理的；地区(性)的

参考例句：

• The current survey will have a wider geographical spread.当前的调查将在更广泛的地域范围內进行。
• These birds have a wide geographical distribution.这些鸟的地理分布很广。

8 toll   

n.过路(桥)费；损失，伤亡人数；v.敲(钟)

参考例句：

• The hailstone took a heavy toll of the crops in our village last night.昨晚那场冰雹损坏了我们村的庄稼。
• The war took a heavy toll of human life.这次战争夺去了许多人的生命。

9 dedicated   

adj.一心一意的；献身的；热诚的

参考例句：

• He dedicated his life to the cause of education.他献身于教育事业。
• His whole energies are dedicated to improve the design.他的全部精力都放在改进这项设计上了。

10 wireless   

adj.无线的；n.无线电

参考例句：

• There are a lot of wireless links in a radio.收音机里有许多无线电线路。
• Wireless messages tell us that the ship was sinking.无线电报告知我们那艘船正在下沉。

11 fixed   

adj.固定的，不变的，准备好的；(计算机)固定的

参考例句：

• Have you two fixed on a date for the wedding yet?你们俩选定婚期了吗？
• Once the aim is fixed,we should not change it arbitrarily.目标一旦确定，我们就不应该随意改变。