Содержание
- 2. ASIMMETRICAL DSL TECHNOLOGIES Lecture 4
- 3. Main terms and usage specifications ADSL technology was developed in 90s. The main objective was to
- 4. Thus, in an ADSL system, three streams are transmitted simultaneously: voice at the 0.3...3.4 kHz spectrum,
- 6. Block diagram of the ADSL transmitter The block diagram of a ADSL transmitter by station block
- 7. Fig 4.3
- 8. For service information transmission using integrated working channel - EOC (Embedded Operations Channel), service control channel
- 9. Consider the appointment of blocks transmitter. Block multiplexing combines four simplex (AS0 - AS3) and three
- 10. Formed streams of binary symbols are distributed through the channels (carriers) of the transmitter according to
- 11. Logical channels and frame structure of ADSL There are 7 channels in ADSL. Table 5.1 Logical
- 12. ADSL logical channels are combined and separated in accordance with the frame and the multiframe structure
- 13. Fig 4.4 Fig 4.5
- 14. "Fast" byte, depending on the frame number (0 ... 67) performs four functions: transmission check of
- 15. Features of ADSL deployment in Ukraine Differences between subscribers networks from Western Europe and Ukrainian Significant
- 16. The main differences are: - different construction principles of subscribers netrowks; - different twist and a
- 17. 2. The deployment of digital networks in Ukraine , as a rule , is carried out
- 18. The maximum length of subscriber lines in many European countries is less than 1.5 km .
- 19. In the national local networks core diameter of 0.4 mm is most common with a large
- 20. Table 4.2 – Parameters of access networks
- 21. Recommendations for networks deployment Basing on the results of the research, experimental installations and digital lines
- 22. 2 In the replacing process from the analog TE to digital LE, the area of customer
- 23. This will reduce the noise induced by the network equipment as well as electrical circuits, power
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