Titlebook: ISDN Technology; R. L. Brewster Book 1993 Chapman & Hall 1993 ISDN.Modulation.Quality of Service.Quality of Service (QoS).Scrambler.Standa

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ATM,X25, frame relay networks use transmission capacity only when there is traffic to send. However, like circuit switching, frame relay is transparent to the data communications protocol used and can switch traffic at relatively high speeds.

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Digital switching,smission techniques, although the way in which it has been implemented in practice makes use of the digital transmission facilities. This development is concerned with the use of digital computers to optimally configure the telecommunications network to obtain efficient user interconnection.

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Book 1993mmunications infrastructure. This evolution is by no means complete and the next few years will see the emergence of a "Broad-band" ISDN as the next stage of evolutionary development. It is important to appreciate the evolutionary nature of the telecommunications infrastructure if one is to properly