Transmission systems
This chapter describes the wide variety of transmission systems used in telecommunication networks today. In doing this, we will be drawing upon the concepts of multiplexing and analogue-to-digital (A/D) conversion introduced in the previous chapter. Earlier chapters have also introduced the important distinction between the Access Network, which serves the subscribers, and the Core Transmission Network, which provides links between network nodes only. In general, the transmission systems described in this chapter may be deployed in both the Access and the Core Transmission Networks - although they are usually more appropriate to one or the others, and this will be indicated. The previous chapter introduced the model of the networks associated with the public switched telephone network (PSTN), in which the Access and Core Transmission Networks act as a common utility for providing circuits to the various specialised networks as well as the PSTN. However, we will leave the description of how the various transmission systems are deployed in the Access and Core Transmission Networks.
Transmission systems, Page 1 of 2
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