Network components
In this chapter, we looked at the basic components used in the links and nodes of telecommunication networks. Beginning with the nodes, we considered the two types of circuit switching: concentrator switching, dealing with low-occupancy subscriber lines; route switching, interconnecting routes between concentrator units and with other exchanges. Then, we considered the alternative form of switching, generally known as packet switching, which is the preferred way of conveying data. The remaining nodal functions considered include: control nodes; multiplexing (FDM, TDM, and CDM); Grooming; Consolidation A generalised view of transmission links was then described, noting that within the switched and Core Transmission networks these are four-wire systems, with Go and Return channels, whereas in the copper Access Network two-wire circuits are used for economy. Then we considered the advantages of an IDN and how it can be extended over the Access Network to the subscribers using ISDN. Finally, the important A/D conversion process was described.
Network components, Page 1 of 2
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