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Definition of "Telephone Exchange" |
A telephone exchange is a telecommunication system used in the public switched telephone network or in large enterprises. An exchange consists of electronic components and in older systems also human operators that interconnect telephone subscriber lines or virtual circuits of digital systems to establish telephone calls between subscribers. / A definition of the term path control layer, in relation to networking, is presented. It refers to layer 3 in the Systems Network Architecture architectural model. The function of this layer is to sequence services related to proper data reassembly. In addition, it is also responsible for routing. |
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