This chapter discusses the local network developments leading to the integrated-services digital network. The problem with single local network cable pair is that it is not, by itself, capable of supporting simultaneous bothway digital transmission because of the impossibility of separating the signals in each direction. The burst-mode technique solves the problem by sending the digital information over the local circuit in short bursts, alternately in one direction and then the other.
The integration of public networks and services, Page 1 of 2
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