The many networks and how they link

The many networks and how they link

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This chapter introduces the concept of the many other telecommunications networks that exist today and how they all interlink. Firstly, we look briefly at the two other types of network, in addition to the PSTN, that carry telephone calls, namely: mobile networks and cable TV networks. It is noted that all three networks use essentially the same type of switching system, but that the mobile networks use radio links and mobility management in place of the fixed wire access of the PSTN and cable TV networks. The necessary interconnection of all these types of networks within a country and to networks in other countries is described. We also introduce the concept of the Internet and how subscribers gain access to it via the PSTN, cable modems over Cable TV networks, xDSL broadband, mobile networks or over leased-lines using optical fibre.

Chapter Contents:

  • 2.1 Introduction
  • 2.2 Other forms of telephone networks
  • 2.2.1 Mobile networks
  • 2.2.2 Cable TV networks
  • 2.3 Interconnection of networks
  • 2.3.1 International calls
  • 2.3.2 Interconnection of a PSTN and a PNO's network
  • 2.3.3 Mobile-to-mobile call via the PSTN
  • 2.4 The Internet
  • 2.5 Access to the Internet
  • 2.5.1 Dial-up via the PSTN and ISDN
  • 2.5.2 Over xDSL broadband links
  • 2.5.3 Over a cable modem
  • 2.5.4 Over optical fibre
  • 2.5.5 Over leased line access
  • 2.5.6 Over mobile network
  • 2.6 The specialist networks associated with a PSTN
  • 2.6.1 Operator-services network
  • 2.6.2 The intelligent network
  • 2.6.3 Business-services network
  • 2.6.4 Leased-lines services network
  • 2.6.5 Data services networks
  • 2.6.6 Telex network
  • 2.7 A model of the set of a Telco's networks
  • 2.8 Summary
  • References

Inspec keywords: mobility management (mobile radio); digital subscriber lines; broadband networks; cable television; telephone networks; modems

Other keywords: telecommunications networks; PSTN networks; mobile networks; switching system; mobility management; optical fibre; public switched telephone network; xDSL broadband networks; cable TV networks; fixed wire access; cable modems; radio links

Subjects: CATV and wired systems; Telephony; Mobile radio systems; Network management; Subscriber loops; Modems

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