CHAPTER 7Broadband ISDN tools: Synchronous digital hierarchy (SDH)
DOI: 10.1201/9781003420408-7
Chapter 2 included a diagram, Figure 2.13, showing the PCM coding technique in the manner that has become accepted, as a long strip. By redrawing this as shown in Figure 7.1, it is apparent we have all along been using the concept underlying SDH.
Figure 7.1PCM coding techniques[19].
The overhead can and does contain indications of where the remainder of the information in the envelope can be found. Channel 16 can contain the signalling information relating to any of the other channels in the envelope. Of course, it is known where everything is because ...
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