Ch 08

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Ch 08

  1. 1. Chapter 8 Circuit Switching and Telephone Network
  2. 2. 8.1 Circuit Switching Space-Division Switch Time-Division Switch TDM Bus Combinations
  3. 3. Figure 8.1 Circuit-switched network
  4. 4. Figure 8.2 A circuit switch
  5. 5. Figure 8.3 A folded switch
  6. 6. Figure 8.4 Crossbar switch
  7. 7. Figure 8.5 Multistage switch
  8. 8. Figure 8.6 Switching path
  9. 9. Figure 8.7 Time-division multiplexing, without and with a time-slot interchange
  10. 10. Figure 8.8 Time-slot interchange
  11. 11. Figure 8.9 TDM bus
  12. 12. Figure 8.10 TST switch
  13. 13. 8.2 Telephone Network Major Components LATAs Making a Connection Analog Services Digital Services A Brief History
  14. 14. Figure 8.11 A telephone system
  15. 15. Intra-LATA services are provided by local exchange carriers. Since 1996, there are two types of LECs: incumbent local exchange carriers and competitive local exchange carriers. Note :
  16. 16. Figure 8.12 Switching offices in a LATA
  17. 17. Figure 8.13 POPs
  18. 18. Figure 8.14 Rotary and touch-tone dialing
  19. 19. Voice communication used analog signals in the past, but is now moving to digital signals. On the other hand, dialing started with digital signals (rotary) and is now moving to analog signals (touch-tone). Note :

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