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Circuit Switching and Telephone Network - PowerPoint PPT Presentation


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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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Presentation Transcript
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Chapter 8

Circuit SwitchingandTelephone Network

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8.1 Circuit Switching

Space-Division Switch

Time-Division Switch

TDM Bus

Combinations

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8.2 Telephone Network

Major Components

LATAs

Making a Connection

Analog Services

Digital Services

A Brief History

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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.

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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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