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Chapter 8

Chapter 8. Circuit Switching and Telephone Network. 8.1 Circuit Switching. Space-Division Switch Time-Division Switch TDM Bus Combinations. Figure 8.1 Circuit-switched network. Figure 8.2 A circuit switch. Figure 8.3 A folded switch. Figure 8.4 Crossbar switch.

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Chapter 8

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  1. Chapter 8 Circuit SwitchingandTelephone Network

  2. 8.1 Circuit Switching Space-Division Switch Time-Division Switch TDM Bus Combinations

  3. Figure 8.1Circuit-switched network

  4. Figure 8.2A circuit switch

  5. Figure 8.3A folded switch

  6. Figure 8.4Crossbar switch

  7. Figure 8.5Multistage switch

  8. Figure 8.6Switching path

  9. Figure 8.7Time-division multiplexing, without and with a time-slot interchange

  10. Figure 8.8Time-slot interchange

  11. Figure 8.9TDM bus

  12. Figure 8.10TST switch

  13. 8.2 Telephone Network Major Components LATAs Making a Connection Analog Services Digital Services A Brief History

  14. Figure 8.11A telephone system

  15. Note: 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.

  16. Figure 8.12Switching offices in a LATA

  17. Figure 8.13POPs

  18. Figure 8.14Rotary and touch-tone dialing

  19. Note: 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).

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