1. to know the three basic processes of PCM: Sampling Quantizing Encoding Teaching 2. to understand that PCM is the heart of technology in communications in Objectives
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 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
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
principle[ pr i nsi pI]n.原理 be dependent on依赖,取决于 sample['samp1]vt..样;样值 quantize[ k won t z]v.量化,分层 ode[koud]v.编码;n.码 scheme[ski:m]n.方案,设计,安排 describe[dis'\ k r ai b]vt.叙述,描述 description叙述,描述
