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.
Circuit SwitchingandTelephone Network
8.1 Circuit Switching
Figure 8.1Circuit-switched network
Figure 8.2A circuit switch
Figure 8.3A folded switch
Figure 8.4Crossbar switch
Figure 8.5Multistage switch
Figure 8.6Switching path
Figure 8.7Time-division multiplexing, without and with a time-slot interchange
Figure 8.8Time-slot interchange
Figure 8.9TDM bus
Figure 8.10TST switch
8.2 Telephone Network
Making a Connection
A Brief History
Figure 8.11A telephone system
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.
Figure 8.12Switching offices in a LATA
Figure 8.14Rotary and touch-tone dialing
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).