Now read the text again and find out if the following statements are true (T) or false (F)?

The usage of optical fibre is the only way to transmit signals nowadays.	T	F
There are three components in the system of optical communication.	T	F
Optical fibres are made of one material only.	T	F
Usually there are several fibres in a cable.	T	F
Optical cables are usually located underground.	T	F
There are many kinds of optical fibres.	T	F
Optical fibres appeared in Europe.	T	F
Optical fibres appeared over a century ago.	T	F
Optical fibres are used for exchanging information only.	T	F
There are 2 ways of splicing optical fibres.	T	F

Now read the text again and answer the following questions.
1. What is optical communication?
2. What are the components of an optical communication system?
3. What are the functions of these components?
4. What are optical fibres usually made of?
5. What is the difference between MMF and SMF?
6. How long is the history of optical fibres?
7. What are the spheres of usage of optical fibres?
8. What are two usual ways of splicing of optical fibres?

Part III

(… адрес интернет-странички с видеороликами…)

FIBRE CABLE

(00:24)

PRE-LISTENING

14. What is optical fibre used for?

15. What are the spheres of usage of optical fibre?

16. What is optical fibre made from?

4. Study the meaning of the following words:

jacket = an outer cover around something (ex. - a pipe)

buffer = a protector = a thing that protects something more important

cladding = a covering of a hard material, used as protection

core = the most important and central part of something

Which of these words have a similar meaning and generally one purpose?

WHILE-LISTENING

Watch the video and answer the following questions:

5. How many elements does the cable in the track consist of?

6. What are they?

POST-LISTENING

7. Try to remember the elements of the cable and tell about its structure without watching the video.

OPTICAL TRANSMISSION TECHNOLOGY

(01:35)

PRE-LISTENING

1. What is optical fibre?

2. What is optical fibre used for?

3. What are the advantages of optical fibre usage?

4. Do you know the following words? Study the meaning of the words:

“network”, “data”, “to consume”, “fluctuation”.

<== попередня сторінка	\|	наступна сторінка ==>
OPTICAL FIBRE	\|	WHILE-LISTENING

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