Network components

Network components

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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.

Chapter Contents:

  • 3.1 Introduction
  • 3.2 Network topologies
  • 3.3 Nodal: concentrator switching
  • 3.4 Nodal: route switching
  • 3.5 Nodal: packet switching and routeing
  • 3.6 Nodal: control (computer processing and storage)
  • 3.7 Nodal: multiplexing
  • 3.7.1 Frequency-division multiplexing
  • 3.7.2 Time-division multiplexing
  • 3.7.3 Code-division multiplexing
  • 3.8 Nodal: grooming
  • 3.9 Nodal: consolidating
  • 3.10 Link component
  • 3.11 Analogue-to-digital conversion
  • 3.11.1 The advantages of digital networks
  • 3.11.2 The analogue-to-digital conversion process
  • 3.12 Summary
  • References

Inspec keywords: subscriber loops; packet radio networks; telecommunication network routing; time division multiplexing; copper; frequency division multiplexing; code division multiplexing

Other keywords: interconnecting routes; two-wire circuits; core transmission networks; A/D conversion process; time division multiplexing; FDM; CDM; four-wire systems; nodal functions; control nodes; telecommunication networks; low-occupancy subscriber lines; circuit switching; code division multiplexing; route switching; transmission links; Cu; packet switching; concentrator switching; copper access network; TDM; concentrator units; network components; frequency division multiplexing

Subjects: Subscriber loops; Communication network design, planning and routing; Communication switching; Radio links and equipment

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