Frame Relay - for Faster and More Efficient Data Communications ...

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Fig. 25Information Model of SDH multiplexer63x2 Mbit s signals are transmitted via a 155Mbit s signalManaged ObjectAdaptation FunctionTrail Termination FunctionSub-Network Connection Functionof the managed TPs may be eitherSOURCE, SINK or BIDIRECTIONAL.SDH Information ModelThe SDH Information Model is based onthe Functional Model already presented.Fig. 15 shows the SDH multiplexing structurewith Transport Functions and relatedsignals. Fig. 25 exemplifies the derivationof Managed Objects related to the multiplexingof 63x2 Mbit/s signals into an STM-1 signal. Fig. 26 shows a correspondingexample of an SDH Regenerator. Table 4lists functions, Resources and those ManagedObjects which are based on Resourcesfor the send and receive parts involvedin multiplexing and demultiplexing.SDH multiplexers offer - in addition to themultiplexing function - cross-connectfunctions, which are treated in detail in thenext chapter. (See also Table 5.) The comparisonof SDH and PDH multiplexers clearlyshows the increased management capabilitiesof the SDH concept.The SDH Information Model can be usedto represent, in a general way, all the differentkinds of SDH networks. The correspondinginheritance hierarchy is shown inFig. 27 and the naming tree in Fig. 28.As a general principle, the containment relationshipbetween TTPs and CTPs (TTPcontains CTP) is used for naming. The associationsbetween CTPs and TTPs areeither fixed links represented by Connec-MultiplexerSection LayerFig. 26Information Model of SDH regeneratorERICSSON REVIEW No. 1-2, 1992
Fig. 27, aboveSDH Termination Point inheritance hierarchy* The name of this MO is not included inRec G.774ANSI standardFig. 28, belowSDH naming treeERICSSON REVIEW No. 1-2, 1992
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ERICSSONREVIEW1-21992Frame Relay -
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Page 10 and 11: 8Fig. 11The frame format used for F
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Page 36 and 37: In Search of Managed ObjectsWalter
Page 38 and 39: Fig. 4The telecommunication network
Page 40 and 41: Fig. 6Functional Model illustrating
Page 42 and 43: 40Fig. 9Combination of layering and
Page 44 and 45: 42Table 2Relationship between Funct
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Page 48 and 49: 46Table 4SDH functions, Resources a
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Page 52 and 53: 50Fig. 21Information Model of PDH d
Page 56 and 57: 54Table 5Cross-connect functions, R
Page 58: Fig. 32, leftCross-connect Fragment
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