Chapter 8
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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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Chapter 8

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Circuit switching and telephone network

Chapter 8

Circuit SwitchingandTelephone Network


Circuit switching and telephone network

8.1 Circuit Switching

Space-Division Switch

Time-Division Switch

TDM Bus

Combinations


Circuit switching and telephone network

Figure 8.1Circuit-switched network


Circuit switching and telephone network

Figure 8.2A circuit switch


Circuit switching and telephone network

Figure 8.3A folded switch


Circuit switching and telephone network

Figure 8.4Crossbar switch


Circuit switching and telephone network

Figure 8.5Multistage switch


Circuit switching and telephone network

Figure 8.6Switching path


Circuit switching and telephone network

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


Circuit switching and telephone network

Figure 8.8Time-slot interchange


Circuit switching and telephone network

Figure 8.9TDM bus


Circuit switching and telephone network

Figure 8.10TST switch


Circuit switching and telephone network

8.2 Telephone Network

Major Components

LATAs

Making a Connection

Analog Services

Digital Services

A Brief History


Circuit switching and telephone network

Figure 8.11A telephone system


Circuit switching and telephone network

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.


Circuit switching and telephone network

Figure 8.12Switching offices in a LATA


Circuit switching and telephone network

Figure 8.13POPs


Circuit switching and telephone network

Figure 8.14Rotary and touch-tone dialing


Circuit switching and telephone network

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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