Exercise 5
Date: 2015-10-07; view: 377.
Exercise 4
Find the English equivalents for the following Russian technical word-combinations:
| 1. | низкоскоростные цифровые каналы | |
| 2. | тракты трафика | |
| 3. | предоставлять высококачественные телекоммуникационные услуги | |
| 4. | техническое обеспечение | |
| 5. | пространственная коммутация | |
| 6. | структура цикла | |
| 7. | битовый поток | |
| 8. | исследование стандартов SDH | |
| 9. | изохронные каналы трафика | |
| 10. | циклы фиксированной длины | |
| 11. | пакетирование передаваемой информации | |
| 12. | чувствительные речевые каналы | |
| 13. | оптические волокна | |
| 14. | непроизводительные затраты мультиплексирования | |
| 15. | полезная нагрузка трафика | |
| 16. | синхронная структура цикла | |
| 17. | границы байта |
Answer the following questions:
1. What does the Synchronous Digital Hierarchy mean?
2. What has the SDH developed into due to the business pressures confronting the world's Public Telecommunications Operators (PTOs)?
3.What is the result of implementing the SDH standards?
4.Why is there such a frenetic activity to changeover from PDH to SDH?
5.Is it possible for PTOs to deliver the quality of service demanded by business customers if they continue to operate transmission networks based on the current PDH?
6.What are the three main limitations of the PDH?
7.Which of the three main problem areas of PDH could have been solved and in what way?
8.Does PDH have currently any agreed management channels or protocol stacks?
9.Why is it difficult to overcome the problem of traffic path inflexibility?
10. What is SDH designed for and what is it based on?
11. What is the basic SDH frame structure?
12. How can a Synchronous Container be viewed? What does it consist of?
13.What is the plesiochronous channel synchronized to?
14.What does the Virtual Container allow PTOs to monitor?
15.What does the SDH perform?
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| The concept of pointers | | | The SDH standards |