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circuit switching |
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circuit switchingA networking technology that provides a temporary, but dedicated, connection between two stations no matter how many switching devices the data are routed through. Circuit switching was originally developed for the analog-based telephone system in order to guarantee steady, consistent service for two people engaged in a phone conversation. Analog circuit switching (FDM) has given way to digital circuit switching (TDM), and the digital counterpart still maintains the connection until broken (one side hangs up). This means bandwidth is continuously reserved and "silence is transmitted" just the same as digital audio. See connection oriented. Contrast with packet switching and message switch.
circuit switching [′sər·kət ‚swich·iŋ] (communications) The method of providing communication service through a switching facility, either from local users or from other switching facilities. A method of transmitting messages through a communications network in which a path from the sender to the receiver of fixed bandwidth or speed is set up for the entire duration of a communication or call.
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The actual voice call is transmitted over a circuit-switched network, but the signaling is done on a separate packet-switched network known as SS7. Voice traffic travels over the same IP network as data and other communications such as e-mail and Web-based communications, versus over a separate circuit-switched network. The actual voice call is transmitted over a circuit-switched network, but the signaling is done on a separate packet-switched network known as SS7. |
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