Sw2 week11

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Sw2 week11

  1. 1. How Circuit-Switched Digital Networks Work<br />Circuit switching<br />Central office<br />Optical fiber<br />Wireless router<br />
  2. 2. Circuit switching<br />Circuit switching is a telecommunications technology by which two network nodes establish a dedicated communicatins channel(circuit) connecting them for the duration of the communication session before the nodes may communicate. The circuit functions as if the nodes were physically connected with an electrical circuit.<br />
  3. 3. Central office<br />In telephone communication in the United States, a central office (CO) is an office in a locality to which subscriber home and business lines are connected on what is called a local loop. The central office has switching equipment that can switch calls locally or to long-distance carrier phone offices.<br />
  4. 4. Optical fiber<br />Optical fiber (or "fiber optic") refers to the medium and the technology associated with the transmission of information as light pulses along a glass or plastic strand or fiber. Optical fiber carries much more information than conventional copper wire and is in general not subject to electromagnetic interference and the need to retransmit signals.<br />
  5. 5. Wireless router<br />LAN ports, which function in the same manner as the ports of a network switch.<br />A WAN port, to connect to a wide area networking, typically one with Internet access. External destinations are accessed using this port.<br />
  6. 6. Reference<br />http://en.wikipedia.org/wiki/Circuit_switching<br />http://searchnetworking.techtarget.com/definition/central-office<br />http://searchtelecom.techtarget.com/definition/optical-fiber<br />

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