The synchronous digital hierarchy. Part 2: Survival of the fittest
Mark Matthews, Peter Newcombe · IEE Review · 1991
For pt.I see ibid., vol.37, no.5, p.185-9, 1991. The authors explain how the synchronous digital hierarchy (SDH) offers a solution the problems caused by the digitalisation of the world's telecommunications networks. The principles and the pros and cons of SDH are also outlined.