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Chapter 6

Chapter 6. Multiplexing and Error Detection/Correction. By Dr. Sukchatri P. Contents. Multiplexing Many to one/one to many Types of multiplexing Telephone system Error Detection/Correction Types of Errors Detection Correction. Multiplexer/Demultiplexer.

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Chapter 6

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  1. Chapter 6 Multiplexing and Error Detection/Correction By Dr.Sukchatri P.

  2. Contents • Multiplexing • Many to one/one to many • Types of multiplexing • Telephone system • Error Detection/Correction • Types of Errors • Detection • Correction

  3. Multiplexer/Demultiplexer

  4. Multiplexer/Demultiplexer

  5. Multiplexing VS No Multiplexing

  6. Catagories of multiplexing

  7. Type of Multiplexer

  8. Frequency Division Multiplex (FDM)

  9. Time Division Multiplex (TDM)

  10. FDM Multiplexing process, Time domain

  11. FDM Multiplexing process, Frequency domain

  12. FDM demultiplexing process, time domian

  13. FDM demultiplexing, frequency domain

  14. Time-Division Multiplexing (TDM)

  15. Synchronous TDM

  16. Synchronous TDM, multiplexing process

  17. Synchronous TDM, demultiplexing process

  18. Framing bits

  19. Data rate calculation for frames

  20. Asynchronous TDM

  21. Examples of asynchronous TDM frames A.Case 1 : only three lines sending data

  22. Examples of asynchronous TDM frames B.Case 2 : only four lines sending data

  23. Examples of asynchronous TDM frames C. Case 3 : all five lines sending data

  24. Multiplexing and inverse multiplexing

  25. Telephone network

  26. Catagories of Telephone service

  27. Catagories of analog services

  28. Analog switched service

  29. Analog leased service

  30. Analog hierarchy

  31. Categories of Digital services

  32. Switched/56 services

  33. DDS services (Digital Data Service) DSU : Digital Service Unit

  34. DS hierarchy (Digital Signal)

  35. T-1 line for multiplexing telephone lines PCM: Plus Code Modulation :> convert analog-digital

  36. T-1 frame structure

  37. Fractional T-1 line DSU : Digital Service Unit CSU : Channel Service Unit

  38. Error Detection and Correction Types of errors

  39. Single-bit error

  40. Multiple-bit error

  41. Burst error of length five

  42. Redundancy

  43. Detection methods

  44. Even parity VRC concept

  45. Longitudinal Redundancy Check (LRC)

  46. VRC and LRC

  47. Cyclic Redundacy Check (CRC) CRC generator and checker

  48. Binary division in a CRC generator

  49. Polynomial

  50. A polynomial representing a divisor

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