Circuit Switching Networks
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Originally, a connection was set up by physically connecting segments of physical wire to form a continuous electrical circuit.
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At present, the circuit is formed using TDM in the synchronous mode
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Circuit switched network guarantees the bit rate and, usually, constant, predictable latency.
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Downside: cost of the connection depends on the reserved bandwidth, not on actual amount of data transferred over the circuit. No statistical multiplexing.
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Examples: phone lines, ISDN lines
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