WHILE-LISTENING

Watch the video and answer the following questions:

00:00 – 00:46

5. Why is it a growing need for the development of optical communication network?

6. What bandwidth is being discussed nowadays as the way to upgrade the existing system?

7. When did the development of the world first 40Gbps-technology begin?

00:47 – 01:05

8. Who and what is the speaker?

01:06 – end

9. How is the optical transmission module characterized?

10. How much electricity does it consume?

11. How many modules of this kind have been produced?

12. Why was a test organized?

POST-LISTENING

13. Complete the summary of the video track. Fill in the gaps with a suitable word.

There is a growing need for the optical (1) __________ network with larger data transmission (2)__________ . Optical networks have to connect each home. Nowadays an optical communication (3) __________ with a transmission capacity of 40 Gbps is being (4)__________ . The development of the world first 40Gbps optical transmission (5) __________ began in 2006. The optical transmission (6) __________ is much more compact than any other transmitter. It consumes only 35 watt of (7) __________ . There have been produced 100 modules of this kind. A special (8) __________ was organized to make sure that the module works reliably under operational (9) __________ changes due to fluctuations and (10) __________ and power supply (11)__________ .

HOW THE OPTICAL FIBRE SYSTEM WORKS

(02:47)

PRE-LISTENING

1. What is optical fibre?

2. What is optical fibre used for?

3. Can you explain what “optical fiber system” is?

4. Can you think of how many elements are involved in this system and what are they?

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

“a medium”, “to simplify”, “setting”, “to code (information)”,

“to encode/to decode”.

<== попередня сторінка	\|	наступна сторінка ==>
Now read the text again and find out if the following statements are true (T) or false (F)?	\|	WHILE-LISTENING

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