Circuit Switching and Telephone Network. 8 장 Circuit Switching and Telephone Network. 8.1 회선교환 (Circuit Switching) 8.2 전화망 (Telephone Network). Switching. Switching ~ whenever we have multiple devices, we have the problem of how to connect them to make one-to-one communication possible.
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8.1 회선교환(Circuit Switching)
8.2 전화망 (Telephone Network)
~ whenever we have multiple devices, we have the problem of how to connect them to make one-to-one communication possible.
~ create a direct physical connection between two devices such as phones or computer.
~ can use either two technologies.
~ connect n input to m output in a grid, using electronic microswitch(transistor) at each crosspoint.
: connect n inputs by m output
(ex : 1000 input, 1000 output → 1,000,000 crosspoint)
~ compare the number of crosspoints in a 15-by-15 single-stage crossbar switch with the 15-by-15 multistage switch.
total number of crosspoint : 78
~ is accomplished using TDM(Time-division multiplexing) and TSI(Time-Slot Interchange)
~ combine space-division and time-division technology to take advantage of the best of both