11, Circuit Switching and Packet Switching destination[. de ti' n e i jan]n.目的地,终点 allocate[' aelak e i t]vt.分配,分派,配给 release[ri'li:s]vt.释放,放松,发布 Jargon[吗a:gan]n.行话,土语

cellular[' se j u13]a.细胞(状)的,蜂窝状的,单元的 mobile[' mou a i l,' mou i()1]a.运动的,流动的,机动的,装在车上的 deploy[di' p iJv.;n.展开,使用,推广应用

NEW WORDS AND PHRASES vISIonary[ vita n ari]n.幻想家,梦想家 contribute [kan tribju]v.捐献,贡献 kan]adv.重大的,效果显著的,具有特殊意义的

Word14 implementi mp manvt.实现,完成成 subscriber szh' ra) traffic[t raf]n.通讯(量),业务,信息量 architectural[a:ki 't ktfa ral]a.建筑上的,结构上的 denote[di' vt.表示,意味着 node[.节点

I. Revision Teacher uses the following exercise to help the students to revise the important expressions or phrases or sentences which were learnt in the loud speaker, study of last unit eacher: When I say a phrase or an expression in Chinese, you respond by blackboard

I. Revision mins com Teacher uses the following exercise to help the students to revise the important expressions or phrases

1. what have we learned in the Unit projector, Possible answers: cellular Mobile Telephone System 2. What is cellular Mobile Telephone System? loud speaker Possible answers: to reuse the allocated frequency band in different geographic locations blackboard

1.to know the development of switching techniques Teaching 2.to understand the main ideas of the text Objectives 3.to master the useful sentence structures, words and expressions used in the relevant exercises

1. to know the operation and advances of WDM and optical network Teaching 2. to understand the main idea and organization of the text; Objectives 3.to master some important new words, phrases and their

1. to know the operation and application of sDh eaching 2. to understand the main idea and organization of the tex Objective