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

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44No1PPI2PPI3SLTTransport Function(sending)No functionAdaptation totransmission mediaNo functionR---MO---Transport Function(receiving)No functionAdaptation toequipmentLoss of signal checkR--LOSMO——D1TTP4SLABinary to HDB-3conversionHDB-3 to binary codeconversionHDB-3 violation checkBERSINK5PPT6PPA10PPI11PPI12SLT13SLA2 Mbit/s overheadinsertion0.064/2 Mbit/smultiplexingNo functionAdaptationto cableNo functionBinary to CMIcode conversion----2 Mbit/s framealignment2 Mbit/s overheadextraction2/0.064 Mbit/sdemultiplexingNo functionAdaptation toequipmentLoss of signal checkCMI to binarycode conversionCMI code violationcheckLOF, AIS, BERRAI--'-LOS-BERDS1 TTPSINK--D4TTPSINK14PPT140 Mbit/s deframing140 Mbit/s overheadinsertion140 Mbit/s framealignment140 Mbit/s overheadextractionLOF, AIS, BERRAIDS4TTP15PPA34/140 Mbit/smultiplexing140/34 Mbit/sdemultiplexingSINK16PPT34 Mbit/s deframing34 Mbit/s overheadinsertion34 Mbit/s framealignment34 Mbit/s overheadextractionLOF, AIS, BERRAIDS3TTP17PPA8/34 Mbit/smultiplexing34/8 Mbit/sdemultiplexingSINKTable 3PDH Functions, Resources and Managed ObjectsLOSLOFBERAISRAIRMOLoss Of SignalLoss Of FrameBit Error RatioAlarm Indication SignalRemote Alarm IndicationResourceManaged Object18PPT19PPA8 Mbit/s deframing8 Mbit/s overheadinsertion2/8 Mbit/smultiplexing8 Mbit/s framealignment8 MBit/s overheadextraction8/2 Mbit/sdemultiplexingLOF, AIS, BERRAIDS2TTPSINKFig. 14SDH-based Transport Network Layered ModelERICSSON REVIEW No. 1-2, 1992
Fig. 15SDH Transport Functions and SignalsFig. 16Functional Model of SDH multiplexer (63x2 Mbit/sto 155 Mbit/s)TMN will permit SDH-based telecommuni- Fig. 16 shows the Layered Functionalcation networks to be monitored and con- Model of a synchronous digital multiplextrolled.Fig. 14 shows the Transport Net- er converting 63x2 Mbit/s framed signalswork Layered Model based on the SDH -connected via pair cables-into one 155multiplexing rules, and Fig. 15 shows the Mbit/s signal transmitted via a fibre-opticalTransport Functions (as defined in G.783) cable. The figure shows the way in whichand related signals. 2the functional blocks (as defined in G.783)ERICSSON REVIEW No. 1-2,1992
Page 1: ERICSSONREVIEW1-21992Frame Relay -
Page 4 and 5: ERICSSON REVIEWBO HEDFORSPublisher
Page 6 and 7: 4Fig. 2Distributed computer environ
Page 8 and 9: Fig. 7A company's data network shou
Page 10 and 11: 8Fig. 11The frame format used for F
Page 12 and 13: 10er (DE, Fig. 12) should be set to
Page 14 and 15: Computerised System for QualityInsp
Page 16 and 17: Box 1Code39, the first alphanumeric
Page 18 and 19: 16Fig. 6Cable attenuation test at E
Page 20 and 21: 18Fig. 9Installing the Dehlfi syste
Page 22 and 23: Human Factors - A Key to ImprovedQu
Page 24 and 25: 221 Use the user's model2 Introduce
Page 26 and 27: 24Fig. 5Advanced Human Factors desi
Page 28 and 29: Fig. 7User interface for PBX attend
Page 30 and 31: Cell-voltage EqualisersSeries BMP 1
Page 32 and 33: 30Box1CELL-VOLTAGE EQUALISER BMP 16
Page 34 and 35: 32age, the faulty cell or the entir
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
Page 48 and 49: 46Table 4SDH functions, Resources a
Page 50 and 51: The Managed Objects and their prope
Page 52 and 53: 50Fig. 21Information Model of PDH d
Page 54 and 55: Fig. 25Information Model of SDH mul
Page 56 and 57: 54Table 5Cross-connect functions, R
Page 58: Fig. 32, leftCross-connect Fragment

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