How Circuit-Switched Digital Networks Work
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This document describes how circuit-switched digital networks work. A dial-up router recognizes external data and initiates a call to a destination using a preprogrammed table. A switching matrix then temporarily connects local and long distance lines for the call. The central office switch accepts the incoming call and digitally connects to the destination using high-speed fiber-optic trunks between switches, after which the receiving router packages the data into Ethernet frames.
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How Circuit-Switched Digital Networks Work
- 2. The dial-up router ●It recognizes data with a destination outside the LAN and initiates a call to a destination selected from a preprogrammed table.
- 3. A switching matrix ● It connects local access lines and long distance services on a temporary per- call basis.
- 4. The central office switch ● It accepts the incoming call and makes a digital connection to the destination.
- 5. A high-speed intraswitch truck ● It is a fiber-optic link operating at a minimum of 45 megabits per second.
- 6. The receiving router ● It packaged The TCP/IP packets into Ethernet.