四川邮电职业技术学院教案专用纸 Teaching Content Contents Teaching Time Apparatuses I. Revision compute can use the following questions to help the students to revise wl projector, they studied in the last unit. 1. What have we studied in the Unit 15? Possible answers: Integrated Services Digital Network 2. What Is ISDN? audio-visual Let one student speak out the answer Il. Pre-reading Activities system 1. Ask the Ss the following two questions related to the theme of the text: blackboard 1) What is the character of today's telecommunication? Possible answers: Specialization recorder, 2) Please give some examples the existing public networks DVD, rted at very low speed. The characters are coded radio 2)POtS(plain old telephone service)is transported via the public switched hanging telephone network(PSTN). This ubiquitous network offers the customers classical chart two-way voice conversation 3)Computer data are transported in the public domain either by a pa I switched data network based on X. 25 protocols, or in a very limited number of countries by a circuit switched data network based on X 21 protocols 2. Teacher leads into the text by saying: From the explanation you gave about telecommunication world, and also you' ve studied telecommunication world before, based on your knowledge about them, I'm sure you can achieve a good understanding of the new text, Now, lets have a careful study of the text. (minute) IlL. while-reading Activities New words and phras Students read the new words and phrases aloud one by one after teacher. 3 Page 3 of 7 Teaching Plan of English for Telecommunications Unit 16四川邮电职业技术学院教案专用纸 Page 3 of 7 Teaching Plan of English for Telecommunications Unit 16 Teaching Content Contents Time Teaching Apparatuses I. Revision Teacher can use the following questions to help the students to revise what they studied in the last unit. 1. What have we studied in the Unit 15? Possible answers: Integrated Services Digital Network. 2. What is ISDN? Let one student speak out the answer. II. Pre-reading Activities 1. Ask the Ss the following two questions related to the theme of the text: 1) What is the character of today’s telecommunication? Possible answers: Specialization. 2) Please give some examples the existing public networks. Possible answers: 1) A telex network transports telex information, i.e. messages of characters, transported at very low speed. The characters are coded based on a specific 5-bit code. . 2) POTS (plain old telephone service) is transported via the public switched telephone network (PSTN). This ubiquitous network offers the customers classical two-way voice conversation. . 3) Computer data are transported in the public domain either by a packet switched data network based on X.25 protocols, or in a very limited number of countries by a circuit switched data network based on X.21 protocols. 2. Teacher leads into the text by saying: From the explanation you gave about telecommunication world, and also you’ve studied telecommunication world before, based on your knowledge about them, I’m sure you can achieve a good understanding of the new text, Now, let’s have a careful study of the text. (1minute) III. While-reading Activities i. New words and phrases Students read the new words and phrases aloud one by one after teacher.( 3 I computer， projector， loud speaker， audio-visual language teaching system， blackboard， recorder， DVD， radio， hanging chart， model