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- W3022113670 abstract "Publisher SummaryA public-switched telecommunication network contains transmission links between different locations known as nodes. A node may be either a subscriber's station that originates and terminates calls or a switching centre. Thus, any two subscribers may communicate by means of the appropriate combination of transmission links connected together at switching nodes for the duration of their call. The transmission links in a national network act as common bearers for a variety of different services. In the case of the simplest telephone call, the call and clear signals are respectively a loop and a disconnection of the subscriber's line, produced by the off hook and on hook states of the telephone handset. A more complex call may be routed through several nodes. It is then necessary for this signaling information to be transmitted between the exchanges at all these nodes. It can, therefore, be seen that a telecommunication network may be considered to consist of the following interacting sub-systems: transmission systems, switching systems, signaling systems. A national network can be seen to consist of a hierarchy of interconnected networks." @default.
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- W3022113670 date "1993-01-01" @default.
- W3022113670 modified "2023-09-27" @default.
- W3022113670 title "Telephone networks" @default.
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- W3022113670 doi "https://doi.org/10.1016/b978-0-7506-1162-6.50035-6" @default.
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